diff --git a/source/java/org/alfresco/util/schemacomp/ComparisonUtils.java b/source/java/org/alfresco/util/schemacomp/ComparisonUtils.java
new file mode 100644
index 0000000000..189dac3a9a
--- /dev/null
+++ b/source/java/org/alfresco/util/schemacomp/ComparisonUtils.java
@@ -0,0 +1,83 @@
+/*
+ * Copyright (C) 2005-2011 Alfresco Software Limited.
+ *
+ * This file is part of Alfresco
+ *
+ * Alfresco is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Alfresco is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with Alfresco. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package org.alfresco.util.schemacomp;
+
+import java.util.Collection;
+
+import org.alfresco.util.schemacomp.Result.Strength;
+import org.alfresco.util.schemacomp.model.DbObject;
+
+/**
+ * Utilities for comparing data structures in the context of comparing two database schemas.
+ * 
+ * @author Matt Ward
+ */
+public interface ComparisonUtils
+{
+    /**
+     * @param objToFind
+     * @return
+     */
+    DbObject findSameObjectAs(Collection<? extends DbObject> objects, final DbObject objToFind);
+
+    void compareSimpleCollections(Collection<? extends Object> leftCollection,
+                Collection<? extends Object> rightCollection, Differences differences,
+                Strength strength);
+
+    /**
+     * Compare collections, reporting differences using the default {@link Result.Strength}
+     * 
+     * @see #compareCollections(Collection, Collection, Differences, Strength)
+     */
+    void compareCollections(Collection<? extends DbObject> leftCollection,
+                Collection<? extends DbObject> rightCollection, Differences differences);
+
+    /**
+     * Compare collections of {@link DbObject}s using their {@link DbObject#diff(DbObject, Differences)} method.
+     * Differences are reported using the specified {@link Result.Strength}.
+     * 
+     * @param leftCollection
+     * @param rightCollection
+     * @param differences
+     * @param strength
+     */
+    void compareCollections(Collection<? extends DbObject> leftCollection,
+                Collection<? extends DbObject> rightCollection, Differences differences,
+                Strength strength);
+
+    /**
+     * Compare two simple objects. Differences are reported using the default Result.Strength.
+     * 
+     * @see #compareSimple(Object, Object, Differences, Strength)
+     */
+    void compareSimple(Object left, Object right, Differences differences);
+
+    /**
+     * Compare two 'simple' (i.e. non-{@link DbObject} objects) using their {@link Object#equals(Object)} method
+     * to decide if there is a difference. Differences are reported using the Result.Strength specified.
+     * 
+     * @param left
+     * @param right
+     * @param differences
+     * @param strength
+     */
+    void compareSimple(Object left, Object right, Differences differences, Strength strength);
+
+}
\ No newline at end of file
diff --git a/source/java/org/alfresco/util/schemacomp/DefaultComparisonUtils.java b/source/java/org/alfresco/util/schemacomp/DefaultComparisonUtils.java
new file mode 100644
index 0000000000..3c48e649e7
--- /dev/null
+++ b/source/java/org/alfresco/util/schemacomp/DefaultComparisonUtils.java
@@ -0,0 +1,197 @@
+/*
+ * Copyright (C) 2005-2011 Alfresco Software Limited.
+ *
+ * This file is part of Alfresco
+ *
+ * Alfresco is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Alfresco is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with Alfresco. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package org.alfresco.util.schemacomp;
+
+import java.util.Collection;
+
+import org.alfresco.util.schemacomp.Result.Strength;
+import org.alfresco.util.schemacomp.Result.Where;
+import org.alfresco.util.schemacomp.model.DbObject;
+import org.apache.commons.collections.CollectionUtils;
+import org.apache.commons.collections.Predicate;
+
+/**
+ * A collection of utility methods for determining differences between two database schemas.
+ * 
+ * @author Matt Ward
+ */
+public class DefaultComparisonUtils implements ComparisonUtils
+{
+    /**
+     * @param objToFind
+     * @return
+     */
+    @Override
+    public DbObject findSameObjectAs(Collection<? extends DbObject> objects, final DbObject objToFind)
+    {
+        return (DbObject) CollectionUtils.find(objects, new Predicate()
+        {
+            @Override
+            public boolean evaluate(Object o)
+            {
+                DbObject object = (DbObject) o;
+                return object.sameAs(objToFind);
+            }
+        });
+    }
+
+    
+    @Override
+    public void compareSimpleCollections(Collection<? extends Object> leftCollection,
+                Collection<? extends Object> rightCollection, Differences differences, Strength strength)
+    {
+        for (Object leftObj : leftCollection)
+        {
+            if (rightCollection.contains(leftObj))
+            {
+                // The same valued object in the right hand collection as in the left.
+                // Note: it isn't possible to determine a result of Where.IN_BOTH_BUT_DIFFERENCE
+                // with a 'simple' value — as there is no way of knowing if the term represents the same value
+                // (e.g. two strings {red_value, green_value}, are these meant to be the same or different?)
+                differences.add(Where.IN_BOTH_NO_DIFFERENCE, leftObj, leftObj, strength);
+            }
+            else
+            {
+                // No equivalent object in the right hand collection.
+                differences.add(Where.ONLY_IN_LEFT, leftObj, null, strength);
+            }
+        }
+
+        // Identify objects in the right collection but not the left
+        for (Object rightObj : rightCollection)
+        {
+            if (!leftCollection.contains(rightObj))
+            {
+                // No equivalent object in the left hand collection.
+                differences.add(Where.ONLY_IN_RIGHT, null, rightObj, strength);
+            }
+        }
+    }
+
+    /**
+     * Compare collections, reporting differences using the default {@link Result.Strength}
+     * 
+     * @see #compareCollections(Collection, Collection, Differences, Strength)
+     */
+    @Override
+    public void compareCollections(Collection<? extends DbObject> leftCollection,
+                Collection<? extends DbObject> rightCollection, Differences differences)
+    {
+        compareCollections(leftCollection, rightCollection, differences, null);
+    }
+    
+    /**
+     * Compare collections of {@link DbObject}s using their {@link DbObject#diff(DbObject, Differences)} method.
+     * Differences are reported using the specified {@link Result.Strength}.
+     * 
+     * @param leftCollection
+     * @param rightCollection
+     * @param differences
+     * @param strength
+     */
+    @Override
+    public void compareCollections(Collection<? extends DbObject> leftCollection,
+                Collection<? extends DbObject> rightCollection, Differences differences, Strength strength)
+    {
+        for (DbObject leftObj : leftCollection)
+        {
+            DbObject rightObj = findSameObjectAs(rightCollection, leftObj);
+
+            if (rightObj != null)
+            {
+                // There is an equivalent object in the right hand collection as
+                // in the left.
+                leftObj.diff(rightObj, differences, strength);
+            }
+            else
+            {
+                // No equivalent object in the right hand collection.
+                differences.add(Where.ONLY_IN_LEFT, leftObj, null, strength);
+            }
+        }
+
+        // Identify objects in the right collection but not the left
+        for (DbObject rightObj : rightCollection)
+        {
+            if (!leftCollection.contains(rightObj))
+            {
+                // No equivalent object in the left hand collection.
+                differences.add(Where.ONLY_IN_RIGHT, null, rightObj, strength);
+            }
+        }
+    }
+
+    /**
+     * Compare two simple objects. Differences are reported using the default Result.Strength.
+     * 
+     * @see #compareSimple(Object, Object, Differences, Strength)
+     */
+    @Override
+    public void compareSimple(Object left, Object right, Differences differences)
+    {
+        compareSimple(left, right, differences, null);
+    }
+    
+    /**
+     * Compare two 'simple' (i.e. non-{@link DbObject} objects) using their {@link Object#equals(Object)} method
+     * to decide if there is a difference. Differences are reported using the Result.Strength specified.
+     * 
+     * @param left
+     * @param right
+     * @param differences
+     * @param strength
+     */
+    @Override
+    public void compareSimple(Object left, Object right, Differences differences, Strength strength)
+    {
+        
+        Where where = null;
+        
+        if (left == right)
+        {
+            // Same object, or both nulls
+            where = Where.IN_BOTH_NO_DIFFERENCE;
+        }
+        else if (left == null)
+        {
+            // right can't be null, or left == right would have been true
+            where = Where.ONLY_IN_RIGHT;
+        }
+        else if (right == null)
+        {
+            // left can't be null, or left == right would have been true
+            where = Where.ONLY_IN_LEFT;
+        }
+        else
+        {
+            // neither are null
+            if (left.equals(right))
+            {
+                where = Where.IN_BOTH_NO_DIFFERENCE;
+            }
+            else
+            {
+                where = Where.IN_BOTH_BUT_DIFFERENCE;
+            }
+        }
+        
+        differences.add(where, left, right, strength);
+    }
+}
diff --git a/source/java/org/alfresco/util/schemacomp/DefaultComparisonUtilsTest.java b/source/java/org/alfresco/util/schemacomp/DefaultComparisonUtilsTest.java
new file mode 100644
index 0000000000..b712b3ee7d
--- /dev/null
+++ b/source/java/org/alfresco/util/schemacomp/DefaultComparisonUtilsTest.java
@@ -0,0 +1,193 @@
+/*
+ * Copyright (C) 2005-2011 Alfresco Software Limited.
+ *
+ * This file is part of Alfresco
+ *
+ * Alfresco is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Alfresco is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with Alfresco. If not, see <http://www.gnu.org/licenses/>.
+ */
+package org.alfresco.util.schemacomp;
+
+
+import static org.junit.Assert.assertNull;
+import static org.junit.Assert.assertSame;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.when;
+
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.Collections;
+import java.util.List;
+
+import org.alfresco.util.schemacomp.Result.Strength;
+import org.alfresco.util.schemacomp.Result.Where;
+import org.alfresco.util.schemacomp.model.DbObject;
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.Mock;
+import org.mockito.runners.MockitoJUnitRunner;
+
+/**
+ * Tests for the SchemaUtils class.
+ * 
+ * @author Matt Ward
+ */
+@RunWith(MockitoJUnitRunner.class)
+public class DefaultComparisonUtilsTest
+{
+    private @Mock Differences differences;
+    private DefaultComparisonUtils comparisonUtils;
+    
+    @Before
+    public void setUp()
+    {
+        comparisonUtils = new DefaultComparisonUtils();
+    }
+    
+    @Test
+    public void compareSimple()
+    {
+        comparisonUtils.compareSimple(null, null, differences, Strength.ERROR);
+        verify(differences).add(Where.IN_BOTH_NO_DIFFERENCE, null, null, Strength.ERROR);
+        
+        comparisonUtils.compareSimple("not_null_string", "not_null_string", differences, Strength.ERROR);
+        verify(differences).add(Where.IN_BOTH_NO_DIFFERENCE, "not_null_string", "not_null_string", Strength.ERROR);
+        
+        comparisonUtils.compareSimple("left", "right", differences, Strength.ERROR);
+        verify(differences).add(Where.IN_BOTH_BUT_DIFFERENCE, "left", "right", Strength.ERROR);
+        
+        comparisonUtils.compareSimple("left", null, differences, Strength.ERROR);
+        verify(differences).add(Where.ONLY_IN_LEFT, "left", null, Strength.ERROR);
+        
+        comparisonUtils.compareSimple(null, "right", differences, Strength.ERROR);
+        verify(differences).add(Where.ONLY_IN_RIGHT, null, "right", Strength.ERROR);
+    }
+    
+    
+    @Test
+    public void compareCollections()
+    {
+        DbObject db1 = mock(DbObject.class);
+        when(db1.sameAs(db1)).thenReturn(true);
+        DbObject db2 = mock(DbObject.class); // only in left
+        when(db2.sameAs(db2)).thenReturn(true);
+        DbObject db3 = mock(DbObject.class); // only in right
+        when(db3.sameAs(db3)).thenReturn(true);
+        DbObject db4 = mock(DbObject.class);
+        when(db4.sameAs(db4)).thenReturn(true);
+
+        Collection<DbObject> left = new ArrayList<DbObject>();
+        Collections.addAll(left, db1, db2, db4);
+        
+        Collection<DbObject> right = new ArrayList<DbObject>();
+        Collections.addAll(right, db1, db3, db4);
+        
+        comparisonUtils.compareCollections(left, right, differences, Strength.ERROR);
+        
+        // Objects in both are asked for their differences
+        verify(db1).diff(db1, differences, Strength.ERROR);
+        verify(db4).diff(db4, differences, Strength.ERROR);
+        
+        // Objects in only one collections are marked as such
+        verify(differences).add(Where.ONLY_IN_LEFT, db2, null, Strength.ERROR);
+        verify(differences).add(Where.ONLY_IN_RIGHT, null, db3, Strength.ERROR);
+    }
+    
+    
+    @Test
+    public void compareSimpleCollections()
+    {
+        Collection<Object> leftCollection = new ArrayList<Object>();
+        leftCollection.add(123);
+        leftCollection.add("both");
+        Collection<Object> subCollectionLeft = new ArrayList<Object>();
+        subCollectionLeft.add(3);
+        subCollectionLeft.add("my string");
+        subCollectionLeft.add(10);
+        subCollectionLeft.add("another");
+        leftCollection.add(subCollectionLeft);
+        leftCollection.add(456);
+        leftCollection.add("left only");
+        
+        Collection<Object> rightCollection = new ArrayList<Object>();
+        rightCollection.add(123);
+        rightCollection.add(789);
+        Collection<Object> subCollectionRight = new ArrayList<Object>(subCollectionLeft);
+        rightCollection.add(subCollectionRight);
+        rightCollection.add("right only");
+        rightCollection.add("both");
+        rightCollection.add("one more right only");
+        
+        comparisonUtils.compareSimpleCollections(leftCollection, rightCollection, differences, Strength.WARN);
+        
+        verify(differences).add(Where.IN_BOTH_NO_DIFFERENCE, 123, 123, Strength.WARN);
+        verify(differences).add(Where.IN_BOTH_NO_DIFFERENCE, "both", "both", Strength.WARN);
+        verify(differences).add(Where.IN_BOTH_NO_DIFFERENCE, subCollectionLeft, subCollectionRight, Strength.WARN);
+        verify(differences).add(Where.ONLY_IN_LEFT, 456, null, Strength.WARN);
+        verify(differences).add(Where.ONLY_IN_LEFT, "left only", null, Strength.WARN);
+
+        verify(differences).add(Where.ONLY_IN_RIGHT, null, 789, Strength.WARN);
+        verify(differences).add(Where.ONLY_IN_RIGHT, null, "right only", Strength.WARN);
+        verify(differences).add(Where.ONLY_IN_RIGHT, null, "one more right only", Strength.WARN);
+    }
+    
+    
+    @Test
+    public void findSameObjectAsSuccessfulFind()
+    {
+        // Make a list of mock DbOjbect objects to test against
+        int numObjects = 20;
+        List<DbObject> dbObjects = createMockDbObjects(numObjects);
+        
+        // The reference that will be used to look for one 'the same' in the collection.
+        DbObject toFind = mock(DbObject.class);
+        
+        // For all other objects sameAs() will return false
+        DbObject objShouldBeFound = dbObjects.get(12);
+        when(objShouldBeFound.sameAs(toFind)).thenReturn(true);
+        
+        DbObject found = comparisonUtils.findSameObjectAs(dbObjects, toFind);
+        
+        assertSame("Found the wrong DbObject", objShouldBeFound, found);
+    }
+    
+    
+    @Test
+    public void findSameObjectAsNotFound()
+    {
+        // Make a list of mock DbOjbect objects to test against
+        int numObjects = 20;
+        List<DbObject> dbObjects = createMockDbObjects(numObjects);
+        
+        // The reference that will be used to look for one 'the same' in the collection.
+        DbObject toFind = mock(DbObject.class);
+        
+        DbObject found = comparisonUtils.findSameObjectAs(dbObjects, toFind);
+        
+        assertNull("Should not have found a matching DbObject", found);
+    }
+    
+    private List<DbObject> createMockDbObjects(int size)
+    {
+        ArrayList<DbObject> dbObjects = new ArrayList<DbObject>(size);
+        for (int i = 0; i < size; i++)
+        {
+            DbObject dbo = mock(DbObject.class);
+            when(dbo.toString()).thenReturn("Mock DbObject " + i);
+            dbObjects.add(dbo);
+        }
+        return dbObjects;
+    }
+}
diff --git a/source/java/org/alfresco/util/schemacomp/Differences.java b/source/java/org/alfresco/util/schemacomp/Differences.java
index f4289c2023..6bb8971638 100644
--- a/source/java/org/alfresco/util/schemacomp/Differences.java
+++ b/source/java/org/alfresco/util/schemacomp/Differences.java
@@ -23,6 +23,7 @@ import java.util.Iterator;
 import java.util.List;
 import java.util.Stack;
 
+import org.alfresco.util.schemacomp.Result.Strength;
 import org.alfresco.util.schemacomp.Result.Where;
 import org.alfresco.util.schemacomp.model.DbObject;
 import org.apache.commons.lang.StringUtils;
@@ -61,10 +62,11 @@ public class Differences implements Iterable<Result>
      * @param where The type of difference, see {@link Where}
      * @param left Left value, or null if the item appears in the right, but not left schema.
      * @param right Right value, or null if the item appears in the left, but not right schema.
+     * @param strength The Result.Strength of the difference, e.g. WARN or ERROR.
      */
-    public void add(Where where, Object left, Object right)
+    public void add(Where where, Object left, Object right, Strength strength)
     {
-        Result result = new Result(where, left, right, path.getCurrentPath());
+        Result result = new Result(where, left, right, path.getCurrentPath(), strength);
         items.add(result);
     }
     
diff --git a/source/java/org/alfresco/util/schemacomp/Result.java b/source/java/org/alfresco/util/schemacomp/Result.java
index 5b694ba517..708efedc7a 100644
--- a/source/java/org/alfresco/util/schemacomp/Result.java
+++ b/source/java/org/alfresco/util/schemacomp/Result.java
@@ -29,18 +29,25 @@ public final class Result
 {
     /** Specifies the type of differences */
     public enum Where { ONLY_IN_LEFT, ONLY_IN_RIGHT, IN_BOTH_NO_DIFFERENCE, IN_BOTH_BUT_DIFFERENCE };
+    public enum Strength { WARN, ERROR };
     private final Where where;
     private final Object left;
     private final Object right;
     private final String path;
-    
+    private final Strength strength;
     
     public Result(Where where, Object left, Object right, String path)
+    {
+        this(where, left, right, path, null);
+    }
+    
+    public Result(Where where, Object left, Object right, String path, Strength strength)
     {
         this.where = where;
         this.left = left;
         this.right = right;
         this.path = path;
+        this.strength = (strength != null ? strength : Strength.ERROR);
     }
 
 
@@ -80,11 +87,22 @@ public final class Result
         return this.path;
     }
 
+    
+    
+    /**
+     * @return the strength
+     */
+    public Strength getStrength()
+    {
+        return this.strength;
+    }
 
+    
+    
     @Override
     public String toString()
     {
         return "Result [where=" + this.where + ", left=" + this.left + ", right=" + this.right
-                    + ", path=" + this.path + "]";
+                    + ", path=" + this.path + ", strength=" + this.strength + "]";
     }
 }
diff --git a/source/java/org/alfresco/util/schemacomp/SchemaCompTestSuite.java b/source/java/org/alfresco/util/schemacomp/SchemaCompTestSuite.java
new file mode 100644
index 0000000000..f2f5bf7a8b
--- /dev/null
+++ b/source/java/org/alfresco/util/schemacomp/SchemaCompTestSuite.java
@@ -0,0 +1,37 @@
+/*
+ * Copyright (C) 2005-2011 Alfresco Software Limited.
+ *
+ * This file is part of Alfresco
+ *
+ * Alfresco is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Alfresco is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with Alfresco. If not, see <http://www.gnu.org/licenses/>.
+ */
+package org.alfresco.util.schemacomp;
+
+import org.junit.runner.RunWith;
+import org.junit.runners.Suite;
+
+/**
+ * Test suite for tests in the schemacomp package.
+ * 
+ * @author Matt Ward
+ */
+@RunWith(Suite.class)
+@Suite.SuiteClasses(
+{
+            DefaultComparisonUtilsTest.class,
+            SchemaComparatorTest.class
+})
+public class SchemaCompTestSuite
+{
+}
diff --git a/source/java/org/alfresco/util/schemacomp/SchemaComparator.java b/source/java/org/alfresco/util/schemacomp/SchemaComparator.java
index 130fa058a4..caa01d46d0 100644
--- a/source/java/org/alfresco/util/schemacomp/SchemaComparator.java
+++ b/source/java/org/alfresco/util/schemacomp/SchemaComparator.java
@@ -18,6 +18,7 @@
  */
 package org.alfresco.util.schemacomp;
 
+import org.alfresco.util.schemacomp.Result.Strength;
 import org.alfresco.util.schemacomp.model.Schema;
 
 /**
@@ -48,7 +49,7 @@ public class SchemaComparator
     public void compare()
     {
         // Check the left schema against the right schema and record any differences.
-        leftSchema.diff(rightSchema, differences);
+        leftSchema.diff(rightSchema, differences, Strength.ERROR);
     }
 
 
diff --git a/source/java/org/alfresco/util/schemacomp/SchemaComparatorTest.java b/source/java/org/alfresco/util/schemacomp/SchemaComparatorTest.java
index a4712a0835..80b6b43a7c 100644
--- a/source/java/org/alfresco/util/schemacomp/SchemaComparatorTest.java
+++ b/source/java/org/alfresco/util/schemacomp/SchemaComparatorTest.java
@@ -19,15 +19,19 @@
 package org.alfresco.util.schemacomp;
 
 
-import static org.junit.Assert.*;
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertNull;
+import static org.junit.Assert.assertTrue;
 
 import java.util.Arrays;
 import java.util.Collection;
 import java.util.Iterator;
 import java.util.List;
 
+import org.alfresco.util.schemacomp.Result.Strength;
 import org.alfresco.util.schemacomp.Result.Where;
 import org.alfresco.util.schemacomp.model.Column;
+import org.alfresco.util.schemacomp.model.DbObject;
 import org.alfresco.util.schemacomp.model.ForeignKey;
 import org.alfresco.util.schemacomp.model.Index;
 import org.alfresco.util.schemacomp.model.PrimaryKey;
@@ -55,11 +59,6 @@ public class SchemaComparatorTest
         right = new Schema("right_schema");
     }
     
-    @Test
-    public void check()
-    {
-        
-    }
 
     @Test
     public void canPerformDiff()
@@ -87,6 +86,8 @@ public class SchemaComparatorTest
         dumpDiffs(comparator.getDifferences(), true);
 
         Iterator<Result> it = comparator.getDifferences().iterator();
+        
+        assertHasDifference("left_schema", "left_schema", "right_schema", it.next()); // schema names
         assertNoDifference("left_schema.tbl_no_diff", "tbl_no_diff", it.next());
         assertNoDifference("left_schema.tbl_no_diff.id", "id", it.next());
         assertNoDifference("left_schema.tbl_no_diff.id", "NUMBER(10)", it.next());        
@@ -126,20 +127,72 @@ public class SchemaComparatorTest
         assertOnlyInOne("left_schema.tbl_has_diff_pk.pk_is_diff", Where.ONLY_IN_RIGHT, "nodeRef", it.next()); // first (& only) column of list
         
         // Items that are ONLY_IN_RIGHT always come at the end
+        assertEquals("Should be table with correct name", "tbl_has_diff_pk", ((DbObject) it.next().getRight()).getName());
         assertOnlyInOne("left_schema", Where.ONLY_IN_RIGHT, table("table_in_right"), it.next());
     }
     
     
+    @Test
+    public void canReportWarnings()
+    {
+        // Left hand side's database objects.
+        left.add(new Table("tbl_example", columns("id NUMBER(10)"), pk("pk_tbl_example", "id"), fkeys(),
+                    indexes("idx_specified_name id")));
+        
+        // Right hand side's database objects.
+        right.add(new Table("tbl_example", columns("id NUMBER(10)"), pk("pk_tbl_example", "id"), fkeys(),
+                    indexes("sys_random_idx_name id")));
+        
+        
+        comparator = new SchemaComparator(left, right);
+        comparator.compare();
+        
+        dumpDiffs(comparator.getDifferences(), true);
+
+        Iterator<Result> it = comparator.getDifferences().iterator();
+        assertHasDifference("left_schema", "left_schema", "right_schema", it.next());
+        assertNoDifference("left_schema.tbl_example", "tbl_example", it.next());
+        assertNoDifference("left_schema.tbl_example.id", "id", it.next());
+        assertNoDifference("left_schema.tbl_example.id", "NUMBER(10)", it.next());        
+        assertNoDifference("left_schema.tbl_example.id", Boolean.FALSE, it.next());
+        assertNoDifference("left_schema.tbl_example.pk_tbl_example", "pk_tbl_example", it.next());
+        assertNoDifference("left_schema.tbl_example.pk_tbl_example", "id", it.next());
+        
+        assertHasWarning(
+                    "left_schema.tbl_example.idx_specified_name",
+                    "idx_specified_name",
+                    "sys_random_idx_name",
+                    it.next());
+    }
+    
     /**
      * Assert that the result shows the value to have different values in the left and right items.
      */
-    private void assertHasDifference(String path, Object leftValue, Object rightValue, Result result)
+    private void assertHasDifference(String path, Object leftValue, Object rightValue,
+                Result result, Strength strength)
     {
+        assertEquals(strength, result.getStrength());
         assertEquals(Where.IN_BOTH_BUT_DIFFERENCE, result.getWhere());
         assertEquals(path, result.getPath());
         assertEquals(leftValue, result.getLeft());
         assertEquals(rightValue, result.getRight());
     }
+    
+    /**
+     * @see #assertHasDifference(String, Object, Object, Result, Strength)
+     */
+    private void assertHasDifference(String path, Object leftValue, Object rightValue, Result result)
+    {
+        assertHasDifference(path, leftValue, rightValue, result, Strength.ERROR);
+    }
+    
+    /**
+     * @see #assertHasDifference(String, Object, Object, Result, Strength)
+     */
+    private void assertHasWarning(String path, Object leftValue, Object rightValue, Result result)
+    {
+        assertHasDifference(path, leftValue, rightValue, result, Strength.WARN);
+    }
 
     /**
      * Assert that the result shows the value to be present only in either the left or right items.
@@ -212,9 +265,7 @@ public class SchemaComparatorTest
     private PrimaryKey pk(String name, String... columnNames)
     {
         assertTrue("No columns specified", columnNames.length > 0);
-        PrimaryKey pk = new PrimaryKey();
-        pk.setName(name);
-        pk.setColumnNames(Arrays.asList(columnNames));
+        PrimaryKey pk = new PrimaryKey(name, Arrays.asList(columnNames));
         return pk;
     }
     
diff --git a/source/java/org/alfresco/util/schemacomp/SchemaUtils.java b/source/java/org/alfresco/util/schemacomp/SchemaUtils.java
deleted file mode 100644
index 146e523d7c..0000000000
--- a/source/java/org/alfresco/util/schemacomp/SchemaUtils.java
+++ /dev/null
@@ -1,132 +0,0 @@
-/*
- * Copyright (C) 2005-2011 Alfresco Software Limited.
- *
- * This file is part of Alfresco
- *
- * Alfresco is free software: you can redistribute it and/or modify
- * it under the terms of the GNU Lesser General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * Alfresco is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public License
- * along with Alfresco. If not, see <http://www.gnu.org/licenses/>.
- */
-
-package org.alfresco.util.schemacomp;
-
-import java.util.Collection;
-
-import org.alfresco.util.schemacomp.Result.Where;
-import org.alfresco.util.schemacomp.model.DbObject;
-import org.apache.commons.collections.CollectionUtils;
-import org.apache.commons.collections.Predicate;
-
-/**
- * TODO: comment me!
- * 
- * @author Matt Ward
- */
-public abstract class SchemaUtils
-{
-    /**
-     * @param objToFind
-     * @return
-     */
-    public static DbObject findSameObjectAs(Collection<? extends DbObject> objects,
-                final DbObject objToFind)
-    {
-        return (DbObject) CollectionUtils.find(objects, new Predicate()
-        {
-            @Override
-            public boolean evaluate(Object o)
-            {
-                DbObject object = (DbObject) o;
-                return object.sameAs(objToFind);
-            }
-        });
-    }
-
-    public static void compareSimpleCollections(Collection<? extends Object> leftCollection,
-                Collection<? extends Object> rightCollection, Differences differences)
-    {
-        for (Object leftObj : leftCollection)
-        {
-            if (rightCollection.contains(leftObj))
-            {
-                // The same valued object in the right hand collection as in the left.
-                differences.add(Where.IN_BOTH_NO_DIFFERENCE, leftObj, leftObj);
-            }
-            else
-            {
-                // No equivalent object in the right hand collection.
-                differences.add(Where.ONLY_IN_LEFT, leftObj, null);
-            }
-        }
-
-        // Identify objects in the right collection but not the left
-        for (Object rightObj : rightCollection)
-        {
-            if (!leftCollection.contains(rightObj))
-            {
-                // No equivalent object in the left hand collection.
-                differences.add(Where.ONLY_IN_RIGHT, null, rightObj);
-            }
-        }
-    }
-
-    public static void compareCollections(Collection<? extends DbObject> leftCollection,
-                Collection<? extends DbObject> rightCollection, Differences differences)
-    {
-        for (DbObject leftObj : leftCollection)
-        {
-            DbObject rightObj = SchemaUtils.findSameObjectAs(rightCollection, leftObj);
-
-            if (rightObj != null)
-            {
-                // There is an equivalent object in the right hand collection as
-                // in the left.
-                leftObj.diff(rightObj, differences);
-            }
-            else
-            {
-                // No equivalent object in the right hand collection.
-                differences.add(Where.ONLY_IN_LEFT, leftObj, null);
-            }
-        }
-
-        // Identify objects in the right collection but not the left
-        for (DbObject rightObj : rightCollection)
-        {
-            if (!leftCollection.contains(rightObj))
-            {
-                // No equivalent object in the left hand collection.
-                differences.add(Where.ONLY_IN_RIGHT, null, rightObj);
-            }
-        }
-    }
-
-    public static void compareSimple(Object left, Object right, Differences differences)
-    {
-        if (left == null && right == null)
-        {
-            differences.add(Where.IN_BOTH_NO_DIFFERENCE, null, null);
-        }
-        else if (left != null && left.equals(right))
-        {
-            differences.add(Where.IN_BOTH_NO_DIFFERENCE, left, right);
-        }
-        else if (left == null && right != null)
-        {
-            differences.add(Where.ONLY_IN_RIGHT, null, right);
-        }
-        else if (left != null && right == null)
-        {
-            differences.add(Where.ONLY_IN_LEFT, left, null);
-        }
-    }
-}
diff --git a/source/java/org/alfresco/util/schemacomp/model/AbstractDbObject.java b/source/java/org/alfresco/util/schemacomp/model/AbstractDbObject.java
index 178e8eb020..0456cec4b4 100644
--- a/source/java/org/alfresco/util/schemacomp/model/AbstractDbObject.java
+++ b/source/java/org/alfresco/util/schemacomp/model/AbstractDbObject.java
@@ -18,8 +18,10 @@
  */
 package org.alfresco.util.schemacomp.model;
 
+import org.alfresco.util.schemacomp.ComparisonUtils;
 import org.alfresco.util.schemacomp.Differences;
-import org.alfresco.util.schemacomp.SchemaUtils;
+import org.alfresco.util.schemacomp.Result.Strength;
+import org.alfresco.util.schemacomp.DefaultComparisonUtils;
 import org.springframework.util.StringUtils;
 
 /**
@@ -30,7 +32,10 @@ import org.springframework.util.StringUtils;
 public abstract class AbstractDbObject implements DbObject
 {
     private String name;
-
+    /** How differences in the name field should be reported */
+    private Strength nameStrength = Strength.ERROR;
+    protected ComparisonUtils comparisonUtils = new DefaultComparisonUtils();
+    
     /**
      * Default constructor
      */
@@ -64,6 +69,22 @@ public abstract class AbstractDbObject implements DbObject
         this.name = name;
     }
     
+    /**
+     * @return the nameStrength
+     */
+    public Strength getNameStrength()
+    {
+        return this.nameStrength;
+    }
+
+    /**
+     * @param nameStrength the nameStrength to set
+     */
+    public void setNameStrength(Strength nameStrength)
+    {
+        this.nameStrength = nameStrength;
+    }
+
     @Override
     public boolean sameAs(DbObject other)
     {
@@ -133,7 +154,7 @@ public abstract class AbstractDbObject implements DbObject
      * its diff correctly.
      */
     @Override
-    public void diff(DbObject right, Differences differences)
+    public void diff(DbObject right, Differences differences, Strength strength)
     {
         if (name != null && StringUtils.hasText(name))
         {
@@ -143,19 +164,30 @@ public abstract class AbstractDbObject implements DbObject
         {
             differences.pushPath("<" + getClass().getSimpleName() + ">");
         }
-        SchemaUtils.compareSimple(name, right.getName(), differences);
-        doDiff(right, differences);
+        comparisonUtils.compareSimple(name, right.getName(), differences, getNameStrength());
+        doDiff(right, differences, strength);
         differences.popPath();
     }
 
-
     /**
      * Override this method to provide subclass specific diffing logic.
      * 
      * @param right
      * @param differences
+     * @param strength
      */
-    protected void doDiff(DbObject right, Differences differences)
+    protected void doDiff(DbObject right, Differences differences, Strength strength)
     {
     }
+
+    /**
+     * If a ComparisonUtils other than the default is required, then this setter can be used.
+     * Useful for testing, where a mock can be injected.
+     * 
+     * @param comparisonUtils the comparisonUtils to set
+     */
+    public void setComparisonUtils(ComparisonUtils comparisonUtils)
+    {
+        this.comparisonUtils = comparisonUtils;
+    }
 }
diff --git a/source/java/org/alfresco/util/schemacomp/model/AbstractDbObjectTest.java b/source/java/org/alfresco/util/schemacomp/model/AbstractDbObjectTest.java
new file mode 100644
index 0000000000..c86a22a209
--- /dev/null
+++ b/source/java/org/alfresco/util/schemacomp/model/AbstractDbObjectTest.java
@@ -0,0 +1,114 @@
+/*
+ * Copyright (C) 2005-2011 Alfresco Software Limited.
+ *
+ * This file is part of Alfresco
+ *
+ * Alfresco is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Alfresco is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with Alfresco. If not, see <http://www.gnu.org/licenses/>.
+ */
+package org.alfresco.util.schemacomp.model;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertTrue;
+import static org.mockito.Mockito.inOrder;
+
+import org.alfresco.util.schemacomp.Differences;
+import org.alfresco.util.schemacomp.Result.Strength;
+import org.alfresco.util.schemacomp.Result.Where;
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.InOrder;
+import org.mockito.Mock;
+import org.mockito.runners.MockitoJUnitRunner;
+
+/**
+ * Tests for the AbstractDbObject base class.
+ * 
+ * @author Matt Ward
+ */
+@RunWith(MockitoJUnitRunner.class)
+public class AbstractDbObjectTest
+{
+    private ConcreteDbObject dbObject;
+    private @Mock Differences differences;
+    
+    /**
+     * @throws java.lang.Exception
+     */
+    @Before
+    public void setUp() throws Exception
+    {
+        dbObject = new ConcreteDbObject("the_object");
+    }
+
+    @Test
+    public void defaultNameStrength()
+    {
+        assertEquals(Strength.ERROR, dbObject.getNameStrength());
+    }
+    
+    @Test
+    public void sameAs()
+    {
+        dbObject.setName(null);
+        assertFalse("Not the same.", dbObject.sameAs(null));
+        assertFalse("Not the same.", dbObject.sameAs(new ConcreteDbObject("other_obj_name")));
+        assertTrue("The very same", dbObject.sameAs(dbObject));
+        
+        dbObject.setName("the_name");
+        assertFalse("Not the same.", dbObject.sameAs(null));
+        assertFalse("Not the same.", dbObject.sameAs(new ConcreteDbObject("different_name")));        
+        assertTrue("Logically the same object.", dbObject.sameAs(new ConcreteDbObject("the_name")));
+        assertTrue("The very same object with non-null name", dbObject.sameAs(dbObject));
+    }
+    
+    
+    @Test
+    public void diff()
+    {
+        ConcreteDbObject otherObject = new ConcreteDbObject("the_other_object");
+        dbObject.setNameStrength(Strength.WARN);
+        
+        dbObject.diff(otherObject, differences, Strength.ERROR);
+        
+        InOrder inOrder = inOrder(differences);
+        // The name of the object should be pushed on to the differences path.
+        inOrder.verify(differences).pushPath("the_object");
+        // The name of the object should be diffed
+        inOrder.verify(differences).add(Where.IN_BOTH_BUT_DIFFERENCE, "the_object", "the_other_object", Strength.WARN);
+        // Then the doDiff() method should be processed
+        inOrder.verify(differences).add(Where.IN_BOTH_BUT_DIFFERENCE, "left", "right", Strength.ERROR);
+        // Later, the path should be popped again
+        inOrder.verify(differences).popPath();
+    }
+
+    
+    /**
+     * Concrete DbObject for testing the AbstractDbObject base class.
+     */
+    private static class ConcreteDbObject extends AbstractDbObject
+    {
+        public ConcreteDbObject(String name)
+        {
+            super(name);
+        }
+
+        @Override
+        protected void doDiff(DbObject right, Differences differences, Strength strength)
+        {
+            differences.add(Where.IN_BOTH_BUT_DIFFERENCE, "left", "right", strength);
+        }
+    }
+}
diff --git a/source/java/org/alfresco/util/schemacomp/model/Column.java b/source/java/org/alfresco/util/schemacomp/model/Column.java
index bd3891125d..67ad47a393 100644
--- a/source/java/org/alfresco/util/schemacomp/model/Column.java
+++ b/source/java/org/alfresco/util/schemacomp/model/Column.java
@@ -19,7 +19,7 @@
 package org.alfresco.util.schemacomp.model;
 
 import org.alfresco.util.schemacomp.Differences;
-import org.alfresco.util.schemacomp.SchemaUtils;
+import org.alfresco.util.schemacomp.Result.Strength;
 
 /**
  * Represents a column in a database table.
@@ -105,10 +105,10 @@ public class Column extends AbstractDbObject
     }
 
     @Override
-    protected void doDiff(DbObject right, Differences differences)
+    protected void doDiff(DbObject right, Differences differences, Strength strength)
     {
         Column rightColumn = (Column) right;
-        SchemaUtils.compareSimple(type, rightColumn.type, differences);
-        SchemaUtils.compareSimple(nullable, rightColumn.nullable, differences);        
+        comparisonUtils.compareSimple(type, rightColumn.type, differences);
+        comparisonUtils.compareSimple(nullable, rightColumn.nullable, differences);        
     }
 }
diff --git a/source/java/org/alfresco/util/schemacomp/model/ColumnTest.java b/source/java/org/alfresco/util/schemacomp/model/ColumnTest.java
new file mode 100644
index 0000000000..edb52c1e29
--- /dev/null
+++ b/source/java/org/alfresco/util/schemacomp/model/ColumnTest.java
@@ -0,0 +1,60 @@
+/*
+ * Copyright (C) 2005-2011 Alfresco Software Limited.
+ *
+ * This file is part of Alfresco
+ *
+ * Alfresco is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Alfresco is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with Alfresco. If not, see <http://www.gnu.org/licenses/>.
+ */
+package org.alfresco.util.schemacomp.model;
+
+
+import org.junit.Before;
+
+/**
+ * Tests for the Column class.
+ * @author Matt Ward
+ */
+public class ColumnTest extends DbObjectTestBase<Column>
+{
+    private Column thisColumn;
+    private Column thatColumn;
+    
+    
+    @Before
+    public void setUp() throws Exception
+    {
+        thisColumn = new Column("this_column", "VARCHAR2(100)", false);
+        thatColumn = new Column("this_column", "NUMBER(10)", true);
+    }
+
+    @Override
+    protected Column getThisObject()
+    {
+        return thisColumn;
+    }
+
+    @Override
+    protected Column getThatObject()
+    {
+        return thatColumn;
+    }
+
+    @Override
+    protected void doDiffTests()
+    {
+        inOrder.verify(comparisonUtils).compareSimple(thisColumn.getType(), thatColumn.getType(), differences);
+        inOrder.verify(comparisonUtils).compareSimple(thisColumn.isNullable(), thatColumn.isNullable(), differences);
+    }
+
+}
diff --git a/source/java/org/alfresco/util/schemacomp/model/DbObject.java b/source/java/org/alfresco/util/schemacomp/model/DbObject.java
index af002fe3ae..66707bbd9f 100644
--- a/source/java/org/alfresco/util/schemacomp/model/DbObject.java
+++ b/source/java/org/alfresco/util/schemacomp/model/DbObject.java
@@ -19,6 +19,7 @@
 package org.alfresco.util.schemacomp.model;
 
 import org.alfresco.util.schemacomp.Differences;
+import org.alfresco.util.schemacomp.Result.Strength;
 
 /**
  * All database objects to be modelled for schema comparisons must implement this interface, examples
@@ -31,6 +32,11 @@ public interface DbObject
     /**
      * Are the two <code>DbObject</code>s logically the same? For example two Index objects may have
      * different names, but are the same index as they both index the same columns for the same table.
+     * <p>
+     * If two objects a and b have the same logical identity, it does not mean that <code>a.equals(b) == true</code>.
+     * The two objects may well have differences and will be flagged as such by the schema comparison tool. When
+     * <code>a.sameAs(b) == true</code> it makes it easier to show the differences as related, i.e. a and b are
+     * different rather than, a is only in the 'left' tree and b is only in the 'right' tree. 
      *  
      * @param other
      * @return
@@ -52,5 +58,5 @@ public interface DbObject
      * @param right The object to compare against.
      * @param differences A collector of differences.
      */
-    void diff(DbObject right, Differences differences);
+    void diff(DbObject right, Differences differences, Strength strength);
 }
diff --git a/source/java/org/alfresco/util/schemacomp/model/DbObjectTestBase.java b/source/java/org/alfresco/util/schemacomp/model/DbObjectTestBase.java
new file mode 100644
index 0000000000..85351a36e0
--- /dev/null
+++ b/source/java/org/alfresco/util/schemacomp/model/DbObjectTestBase.java
@@ -0,0 +1,102 @@
+/*
+ * Copyright (C) 2005-2011 Alfresco Software Limited.
+ *
+ * This file is part of Alfresco
+ *
+ * Alfresco is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Alfresco is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with Alfresco. If not, see <http://www.gnu.org/licenses/>.
+ */
+package org.alfresco.util.schemacomp.model;
+
+import static org.mockito.Mockito.inOrder;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import org.alfresco.util.schemacomp.ComparisonUtils;
+import org.alfresco.util.schemacomp.Differences;
+import org.alfresco.util.schemacomp.Result.Strength;
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.InOrder;
+import org.mockito.Mock;
+import org.mockito.runners.MockitoJUnitRunner;
+
+/**
+ * Abstract base class for tests for AbstractDbObject subclasses.
+ * 
+ * @author Matt Ward
+ */
+@RunWith(MockitoJUnitRunner.class)
+public abstract class DbObjectTestBase<T extends AbstractDbObject>
+{
+    protected @Mock Differences differences;
+    protected @Mock ComparisonUtils comparisonUtils;
+    protected InOrder inOrder;
+    protected abstract T getThisObject();
+    protected abstract T getThatObject();
+    
+    @Before
+    public void setUpMockito()
+    {
+        // Check that the correct calls happened in the correct order.
+        List<Object> mocks = getMocksUsedInDiff();
+        inOrder = inOrder(mocks.toArray());
+    }
+    
+    
+    /**
+     * Override to add additional mocks to the InOrder call verification.
+     * 
+     * @return List<Object>
+     */
+    protected List<Object> getMocksUsedInDiff()
+    {
+        List<Object> objects = new ArrayList<Object>();
+        objects.add(differences);
+        objects.add(comparisonUtils);
+        return objects;
+    }
+    
+    
+    @Test
+    public void canDiffObjects()
+    {
+        AbstractDbObject thisObject = getThisObject();
+        thisObject.setComparisonUtils(comparisonUtils);
+        AbstractDbObject thatObject = getThatObject();
+        thatObject.setComparisonUtils(comparisonUtils);
+        
+        // Invoke the method under test
+        thisObject.diff(thatObject, differences, Strength.ERROR);
+        
+        // The name of the object should be pushed on to the differences path.
+        inOrder.verify(differences).pushPath(thisObject.getName());
+        
+        // The name of the object should be diffed
+        inOrder.verify(comparisonUtils).compareSimple(
+                    thisObject.getName(),
+                    thatObject.getName(),
+                    differences,
+                    thisObject.getNameStrength());
+        
+        // Then the doDiff() method should be processed...
+        doDiffTests();
+        
+        // Later, the path should be popped again
+        inOrder.verify(differences).popPath();
+    }
+    
+    protected abstract void doDiffTests();
+}
diff --git a/source/java/org/alfresco/util/schemacomp/model/ForeignKey.java b/source/java/org/alfresco/util/schemacomp/model/ForeignKey.java
index 5dddb6dddf..24cb734b14 100644
--- a/source/java/org/alfresco/util/schemacomp/model/ForeignKey.java
+++ b/source/java/org/alfresco/util/schemacomp/model/ForeignKey.java
@@ -19,7 +19,7 @@
 package org.alfresco.util.schemacomp.model;
 
 import org.alfresco.util.schemacomp.Differences;
-import org.alfresco.util.schemacomp.SchemaUtils;
+import org.alfresco.util.schemacomp.Result.Strength;
 
 
 /**
@@ -137,11 +137,11 @@ public class ForeignKey extends AbstractDbObject
     
     
     @Override
-    protected void doDiff(DbObject right, Differences differences)
+    protected void doDiff(DbObject right, Differences differences, Strength strength)
     {
         ForeignKey rightFK = (ForeignKey) right;
-        SchemaUtils.compareSimple(localColumn, rightFK.localColumn, differences);
-        SchemaUtils.compareSimple(targetTable, rightFK.targetTable, differences);
-        SchemaUtils.compareSimple(targetColumn, rightFK.targetColumn, differences);        
+        comparisonUtils.compareSimple(localColumn, rightFK.localColumn, differences);
+        comparisonUtils.compareSimple(targetTable, rightFK.targetTable, differences);
+        comparisonUtils.compareSimple(targetColumn, rightFK.targetColumn, differences);        
     }    
 }
diff --git a/source/java/org/alfresco/util/schemacomp/model/ForeignKeyTest.java b/source/java/org/alfresco/util/schemacomp/model/ForeignKeyTest.java
new file mode 100644
index 0000000000..af49e4c8e9
--- /dev/null
+++ b/source/java/org/alfresco/util/schemacomp/model/ForeignKeyTest.java
@@ -0,0 +1,63 @@
+/*
+ * Copyright (C) 2005-2011 Alfresco Software Limited.
+ *
+ * This file is part of Alfresco
+ *
+ * Alfresco is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Alfresco is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with Alfresco. If not, see <http://www.gnu.org/licenses/>.
+ */
+package org.alfresco.util.schemacomp.model;
+
+
+import org.junit.Before;
+
+/**
+ * Tests for the ForeignKey class.
+ * 
+ * @author Matt Ward
+ */
+public class ForeignKeyTest extends DbObjectTestBase<ForeignKey>
+{
+    private ForeignKey thisFK, thatFK;
+    
+
+    @Before
+    public void setUp() throws Exception
+    {
+        thisFK = new ForeignKey("this_fk", "local_col", "target_table", "target_col");
+        thatFK = new ForeignKey("that_fk", "local_col", "target_table", "target_col");
+    }
+
+
+    @Override
+    protected ForeignKey getThisObject()
+    {
+        return thisFK;
+    }
+
+
+    @Override
+    protected ForeignKey getThatObject()
+    {
+        return thatFK;
+    }
+
+
+    @Override
+    protected void doDiffTests()
+    {
+        inOrder.verify(comparisonUtils).compareSimple(thisFK.getLocalColumn(), thatFK.getLocalColumn(), differences);
+        inOrder.verify(comparisonUtils).compareSimple(thisFK.getTargetTable(), thatFK.getTargetTable(), differences);
+        inOrder.verify(comparisonUtils).compareSimple(thisFK.getTargetColumn(), thatFK.getTargetColumn(), differences);
+    }
+}
diff --git a/source/java/org/alfresco/util/schemacomp/model/Index.java b/source/java/org/alfresco/util/schemacomp/model/Index.java
index 5e7a0f774b..b01ba50d7f 100644
--- a/source/java/org/alfresco/util/schemacomp/model/Index.java
+++ b/source/java/org/alfresco/util/schemacomp/model/Index.java
@@ -21,7 +21,7 @@ package org.alfresco.util.schemacomp.model;
 import java.util.List;
 
 import org.alfresco.util.schemacomp.Differences;
-import org.alfresco.util.schemacomp.SchemaUtils;
+import org.alfresco.util.schemacomp.Result.Strength;
 
 /**
  * Represents an index on a table.
@@ -40,6 +40,7 @@ public class Index extends AbstractDbObject
     {
         super(name);
         this.columnNames = columnNames;
+        setNameStrength(Strength.WARN);
     }
 
     /**
@@ -105,10 +106,11 @@ public class Index extends AbstractDbObject
         return false;
     }
 
+    
     @Override
-    protected void doDiff(DbObject right, Differences differences)
+    protected void doDiff(DbObject right, Differences differences, Strength strength)
     {
         Index rightIndex = (Index) right;
-        SchemaUtils.compareSimpleCollections(columnNames, rightIndex.columnNames, differences);
+        comparisonUtils.compareSimpleCollections(columnNames, rightIndex.columnNames, differences, strength);
     }
 }
diff --git a/source/java/org/alfresco/util/schemacomp/model/IndexTest.java b/source/java/org/alfresco/util/schemacomp/model/IndexTest.java
new file mode 100644
index 0000000000..fbe8f25102
--- /dev/null
+++ b/source/java/org/alfresco/util/schemacomp/model/IndexTest.java
@@ -0,0 +1,93 @@
+/*
+ * Copyright (C) 2005-2011 Alfresco Software Limited.
+ *
+ * This file is part of Alfresco
+ *
+ * Alfresco is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Alfresco is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with Alfresco. If not, see <http://www.gnu.org/licenses/>.
+ */
+package org.alfresco.util.schemacomp.model;
+
+import java.util.Arrays;
+
+import org.alfresco.util.schemacomp.Result.Strength;
+import org.junit.Before;
+import org.junit.Test;
+import static org.junit.Assert.*;
+
+
+/**
+ * Tests for the Index class.
+ * @author Matt Ward
+ */
+public class IndexTest extends DbObjectTestBase<Index>
+{
+    private Index thisIndex;
+    private Index thatIndex;
+
+    @Before
+    public void setUp()
+    {
+        thisIndex = new Index("this_index", Arrays.asList("id", "name", "age"));
+        thatIndex = new Index("that_index", Arrays.asList("a", "b"));        
+    }
+    
+    @Override
+    protected Index getThisObject()
+    {
+        return thisIndex;
+    }
+
+    @Override
+    protected Index getThatObject()
+    {
+        return thatIndex;
+    }
+
+    @Override
+    protected void doDiffTests()
+    {
+        inOrder.verify(comparisonUtils).compareSimpleCollections(
+                    thisIndex.getColumnNames(), 
+                    thatIndex.getColumnNames(), 
+                    differences, 
+                    Strength.ERROR);
+    }
+
+    
+    @Test
+    public void differentNamesResultInWarningsNotErrors()
+    {
+        assertEquals("Name differences should be reported as warnings.", Strength.WARN, thisIndex.getNameStrength());
+    }
+    
+    
+    @Test
+    public void sameAs()
+    {
+       assertTrue("Indexes should be logically the same.",
+                   thisIndex.sameAs(new Index("this_index", Arrays.asList("id", "name", "age"))));
+       
+       assertTrue("Indexes should be logically the same, despite different names (as same column order)",
+                   thisIndex.sameAs(new Index("different_name", Arrays.asList("id", "name", "age")))); 
+
+       assertTrue("Indexes should be identified as the same despite different column order (as same name).",
+                   thisIndex.sameAs(new Index("this_index", Arrays.asList("name", "id", "age")))); 
+
+       assertFalse("Indexes should be identified different (different name and column order)",
+                   thisIndex.sameAs(new Index("different_name", Arrays.asList("name", "id", "age")))); 
+       
+       assertFalse("Indexes should be identified different (different name & different columns)",
+                   thisIndex.sameAs(new Index("different_name", Arrays.asList("node_ref", "url"))));
+    }
+}
diff --git a/source/java/org/alfresco/util/schemacomp/model/ModelTestSuite.java b/source/java/org/alfresco/util/schemacomp/model/ModelTestSuite.java
new file mode 100644
index 0000000000..6c7d8714c7
--- /dev/null
+++ b/source/java/org/alfresco/util/schemacomp/model/ModelTestSuite.java
@@ -0,0 +1,44 @@
+/*
+ * Copyright (C) 2005-2011 Alfresco Software Limited.
+ *
+ * This file is part of Alfresco
+ *
+ * Alfresco is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Alfresco is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with Alfresco. If not, see <http://www.gnu.org/licenses/>.
+ */
+package org.alfresco.util.schemacomp.model;
+
+import org.junit.runner.RunWith;
+import org.junit.runners.Suite;
+
+/**
+ * Test suite for all the model tests.
+ * 
+ * @author Matt Ward
+ */
+@RunWith(Suite.class)
+@Suite.SuiteClasses(
+{
+    AbstractDbObjectTest.class,
+    ColumnTest.class,
+    ForeignKeyTest.class,
+    IndexTest.class,
+    PrimaryKeyTest.class,
+    SchemaTest.class,
+    SequenceTest.class,
+    TableTest.class
+})
+public class ModelTestSuite
+{
+    // Suite defined by annotation above.
+}
diff --git a/source/java/org/alfresco/util/schemacomp/model/PrimaryKey.java b/source/java/org/alfresco/util/schemacomp/model/PrimaryKey.java
index c740d5cf98..0c15ab4749 100644
--- a/source/java/org/alfresco/util/schemacomp/model/PrimaryKey.java
+++ b/source/java/org/alfresco/util/schemacomp/model/PrimaryKey.java
@@ -21,7 +21,7 @@ package org.alfresco.util.schemacomp.model;
 import java.util.List;
 
 import org.alfresco.util.schemacomp.Differences;
-import org.alfresco.util.schemacomp.SchemaUtils;
+import org.alfresco.util.schemacomp.Result.Strength;
 
 /**
  * Primary key on a table.
@@ -33,6 +33,17 @@ public class PrimaryKey extends AbstractDbObject
     private List<String> columnNames;
 
 
+    /**
+     * Constructor
+     * @param name
+     * @param columnNames
+     */
+    public PrimaryKey(String name, List<String> columnNames)
+    {
+        super(name);
+        this.columnNames = columnNames;
+    }
+
     /**
      * @return the columnNames
      */
@@ -74,9 +85,9 @@ public class PrimaryKey extends AbstractDbObject
     }
 
     @Override
-    protected void doDiff(DbObject right, Differences differences)
+    protected void doDiff(DbObject right, Differences differences, Strength strength)
     {
         PrimaryKey rightPK = (PrimaryKey) right;        
-        SchemaUtils.compareSimpleCollections(columnNames, rightPK.columnNames, differences);
+        comparisonUtils.compareSimpleCollections(columnNames, rightPK.columnNames, differences, strength);
     }
 }
diff --git a/source/java/org/alfresco/util/schemacomp/model/PrimaryKeyTest.java b/source/java/org/alfresco/util/schemacomp/model/PrimaryKeyTest.java
new file mode 100644
index 0000000000..7a4ebaefa4
--- /dev/null
+++ b/source/java/org/alfresco/util/schemacomp/model/PrimaryKeyTest.java
@@ -0,0 +1,66 @@
+/*
+ * Copyright (C) 2005-2011 Alfresco Software Limited.
+ *
+ * This file is part of Alfresco
+ *
+ * Alfresco is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Alfresco is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with Alfresco. If not, see <http://www.gnu.org/licenses/>.
+ */
+package org.alfresco.util.schemacomp.model;
+
+import java.util.Arrays;
+
+import org.alfresco.util.schemacomp.Result.Strength;
+import org.junit.Before;
+
+
+/**
+ * Tests for the PrimaryKey class.
+ * 
+ * @author Matt Ward
+ */
+public class PrimaryKeyTest extends DbObjectTestBase<PrimaryKey>
+{
+    private PrimaryKey thisPK;
+    private PrimaryKey thatPK;
+
+    @Before
+    public void setUp()
+    {
+        thisPK = new PrimaryKey("this_pk", Arrays.asList("id", "name", "age"));
+        thatPK = new PrimaryKey("that_pk", Arrays.asList("a", "b"));        
+    }
+    
+    @Override
+    protected PrimaryKey getThisObject()
+    {
+        return thisPK;
+    }
+
+    @Override
+    protected PrimaryKey getThatObject()
+    {
+        return thatPK;
+    }
+
+    @Override
+    protected void doDiffTests()
+    {
+        inOrder.verify(comparisonUtils).compareSimpleCollections(
+                    thisPK.getColumnNames(), 
+                    thatPK.getColumnNames(), 
+                    differences, 
+                    Strength.ERROR);
+    }
+
+}
diff --git a/source/java/org/alfresco/util/schemacomp/model/Schema.java b/source/java/org/alfresco/util/schemacomp/model/Schema.java
index 89f65cbd5f..da5ee3a261 100644
--- a/source/java/org/alfresco/util/schemacomp/model/Schema.java
+++ b/source/java/org/alfresco/util/schemacomp/model/Schema.java
@@ -23,7 +23,7 @@ import java.util.Iterator;
 import java.util.List;
 
 import org.alfresco.util.schemacomp.Differences;
-import org.alfresco.util.schemacomp.SchemaUtils;
+import org.alfresco.util.schemacomp.Result.Strength;
 
 /**
  * Instances of this class represent a database schema.
@@ -32,7 +32,7 @@ import org.alfresco.util.schemacomp.SchemaUtils;
  */
 public class Schema extends AbstractDbObject implements Iterable<DbObject>
 {
-    private final List<DbObject> objects = new ArrayList<DbObject>();
+    protected final List<DbObject> objects = new ArrayList<DbObject>();
 
     /**
      * Construct a schema with the given name.
@@ -90,9 +90,9 @@ public class Schema extends AbstractDbObject implements Iterable<DbObject>
     
     
     @Override
-    protected void doDiff(DbObject right, Differences differences)
+    protected void doDiff(DbObject right, Differences differences, Strength strength)
     {
         Schema rightSchema = (Schema) right;
-        SchemaUtils.compareCollections(objects, rightSchema.objects, differences);
+        comparisonUtils.compareCollections(objects, rightSchema.objects, differences);
     }
 }
diff --git a/source/java/org/alfresco/util/schemacomp/model/SchemaTest.java b/source/java/org/alfresco/util/schemacomp/model/SchemaTest.java
new file mode 100644
index 0000000000..899d4529f1
--- /dev/null
+++ b/source/java/org/alfresco/util/schemacomp/model/SchemaTest.java
@@ -0,0 +1,62 @@
+/*
+ * Copyright (C) 2005-2011 Alfresco Software Limited.
+ *
+ * This file is part of Alfresco
+ *
+ * Alfresco is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Alfresco is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with Alfresco. If not, see <http://www.gnu.org/licenses/>.
+ */
+package org.alfresco.util.schemacomp.model;
+
+import org.junit.Before;
+import org.junit.runner.RunWith;
+import org.mockito.runners.MockitoJUnitRunner;
+
+/**
+ * Tests for the Schema class.
+ * 
+ * @author Matt Ward
+ */
+@RunWith(MockitoJUnitRunner.class)
+public class SchemaTest extends DbObjectTestBase<Schema>
+{
+    private Schema left;
+    private Schema right;
+    
+    @Before
+    public void setUp()
+    {
+        left = new Schema("left_schema");
+        right = new Schema("right_schema");
+    }
+    
+    @Override
+    protected Schema getThisObject()
+    {
+        return left;
+    }
+
+    @Override
+    protected Schema getThatObject()
+    {
+        return right;
+    }
+
+    @Override
+    protected void doDiffTests()
+    {
+        // In addition to the base class functionality, Schema.diff() compares
+        // the DbObjects held in the other schema with its own DbObjects.
+        inOrder.verify(comparisonUtils).compareCollections(left.objects, right.objects, differences);
+    }
+}
diff --git a/source/java/org/alfresco/util/schemacomp/model/SequenceTest.java b/source/java/org/alfresco/util/schemacomp/model/SequenceTest.java
new file mode 100644
index 0000000000..a53ef1844b
--- /dev/null
+++ b/source/java/org/alfresco/util/schemacomp/model/SequenceTest.java
@@ -0,0 +1,36 @@
+/*
+ * Copyright (C) 2005-2011 Alfresco Software Limited.
+ *
+ * This file is part of Alfresco
+ *
+ * Alfresco is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Alfresco is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with Alfresco. If not, see <http://www.gnu.org/licenses/>.
+ */
+package org.alfresco.util.schemacomp.model;
+
+import org.junit.Ignore;
+import org.junit.Test;
+
+/**
+ * Tests for the Sequence class.
+ * @author Matt Ward
+ */
+public class SequenceTest
+{
+    @Ignore
+    @Test
+    public void noTestsRequired()
+    {
+        // No functionality over and above AbstractDbObject at present.
+    }
+}
diff --git a/source/java/org/alfresco/util/schemacomp/model/Table.java b/source/java/org/alfresco/util/schemacomp/model/Table.java
index e79fc36614..8a9d2811a5 100644
--- a/source/java/org/alfresco/util/schemacomp/model/Table.java
+++ b/source/java/org/alfresco/util/schemacomp/model/Table.java
@@ -23,7 +23,7 @@ import java.util.Collection;
 import java.util.List;
 
 import org.alfresco.util.schemacomp.Differences;
-import org.alfresco.util.schemacomp.SchemaUtils;
+import org.alfresco.util.schemacomp.Result.Strength;
 
 /**
  * Instances of this class represent a database table.
@@ -165,24 +165,22 @@ public class Table extends AbstractDbObject
             if (other.indexes != null) return false;
         }
         else if (!this.indexes.equals(other.indexes)) return false;
-        // TODO: this is difficult, equals probably should include this, but diffs shouldn't -
-        // decide what to do about this.
-//        if (this.primaryKey == null)
-//        {
-//            if (other.primaryKey != null) return false;
-//        }
-//        else if (!this.primaryKey.equals(other.primaryKey)) return false;
+        if (this.primaryKey == null)
+        {
+            if (other.primaryKey != null) return false;
+        }
+        else if (!this.primaryKey.equals(other.primaryKey)) return false;
         return true;
     }
 
 
     @Override
-    protected void doDiff(DbObject other, Differences differences)
+    protected void doDiff(DbObject other, Differences differences, Strength strength)
     {        
         Table rightTable = (Table) other; 
-        SchemaUtils.compareCollections(columns, rightTable.columns, differences);
-        primaryKey.diff(rightTable.primaryKey, differences);
-        SchemaUtils.compareCollections(foreignKeys, rightTable.foreignKeys, differences);
-        SchemaUtils.compareCollections(indexes, rightTable.indexes, differences);
+        comparisonUtils.compareCollections(columns, rightTable.columns, differences);
+        primaryKey.diff(rightTable.primaryKey, differences, strength);
+        comparisonUtils.compareCollections(foreignKeys, rightTable.foreignKeys, differences);
+        comparisonUtils.compareCollections(indexes, rightTable.indexes, differences);
     }
 }
diff --git a/source/java/org/alfresco/util/schemacomp/model/TableTest.java b/source/java/org/alfresco/util/schemacomp/model/TableTest.java
new file mode 100644
index 0000000000..6cb9fe21ed
--- /dev/null
+++ b/source/java/org/alfresco/util/schemacomp/model/TableTest.java
@@ -0,0 +1,102 @@
+/*
+ * Copyright (C) 2005-2011 Alfresco Software Limited.
+ *
+ * This file is part of Alfresco
+ *
+ * Alfresco is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Alfresco is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with Alfresco. If not, see <http://www.gnu.org/licenses/>.
+ */
+package org.alfresco.util.schemacomp.model;
+
+
+import static java.util.Arrays.asList;
+
+import java.util.Collection;
+import java.util.List;
+
+import org.alfresco.util.schemacomp.Result.Strength;
+import org.junit.Before;
+import org.junit.runner.RunWith;
+import org.mockito.Mock;
+import org.mockito.runners.MockitoJUnitRunner;
+
+/**
+ * Tests for the Table class.
+ * 
+ * @author Matt Ward
+ */
+@RunWith(MockitoJUnitRunner.class)
+public class TableTest extends DbObjectTestBase<Table>
+{
+    private Table table;
+    private Table otherTable;
+    private Collection<Column> columns;
+    private @Mock PrimaryKey primaryKey;
+    private Collection<ForeignKey> foreignKeys;
+    private Collection<Index> indexes;
+    
+    
+    @Before
+    public void setUp() throws Exception
+    {
+        columns = asList(
+                    new Column("columnA", "VARCHAR2(50)", false),
+                    new Column("columnB", "VARCHAR2(100)", false),
+                    new Column("columnC", "VARCHAR2(200)", true));
+        
+        foreignKeys = asList(new ForeignKey("fk", "localcolumn", "targettable", "targetcolumn"));
+        
+        indexes = asList(new Index("an_index", asList("columnA", "columnC")));
+        
+        table = new Table("the_table", columns, primaryKey, foreignKeys, indexes);
+        otherTable = new Table("the_other_table", columns, primaryKey, foreignKeys, indexes);
+    }
+    
+    
+    @Override
+    protected List<Object> getMocksUsedInDiff()
+    {
+        List<Object> mocks = super.getMocksUsedInDiff();
+        mocks.add(primaryKey);
+        return mocks;
+    }
+
+    public void doDiffTests()
+    {
+        // Check columns
+        inOrder.verify(comparisonUtils).compareCollections(table.getColumns(), otherTable.getColumns(), differences);
+        
+        // Check primary key
+        inOrder.verify(primaryKey).diff(otherTable.getPrimaryKey(), differences, Strength.ERROR);
+        
+        // Check foreign keys
+        inOrder.verify(comparisonUtils).compareCollections(
+                    table.getForeignKeys(), otherTable.getForeignKeys(), differences);
+                
+        // Check indexes
+        inOrder.verify(comparisonUtils).compareCollections(
+                    table.getIndexes(), otherTable.getIndexes(), differences);
+    }
+
+    @Override
+    protected Table getThisObject()
+    {
+        return table;
+    }
+
+    @Override
+    protected Table getThatObject()
+    {
+        return otherTable;
+    }
+}