New 'core:/utils/ObjectUtils', additional unit tests

ng2-components/ng2-alfresco-core/src/utils/object-utils.spec.ts

@@ -0,0 +1,59 @@
+/*!
+ * @license
+ * Copyright 2016 Alfresco Software, Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import {
+    it,
+    describe,
+    expect
+} from '@angular/core/testing';
+import { ObjectUtils } from './object-utils';
+
+describe('ObjectUtils', () => {
+
+    it('should get top level property value', () => {
+        let obj = {
+            id: 1
+        };
+        expect(ObjectUtils.getValue(obj, 'id')).toBe(1);
+    });
+
+    it('should not get top level property value', () => {
+        let obj = {};
+        expect(ObjectUtils.getValue(obj, 'missing')).toBeUndefined();
+    });
+
+    it('should get nested property value', () => {
+        let obj = {
+            name: {
+                firstName: 'John',
+                lastName: 'Doe'
+            }
+        };
+
+        expect(ObjectUtils.getValue(obj, 'name.lastName')).toBe('Doe');
+    });
+
+    it('should not get nested property value', () => {
+        let obj = {};
+        expect(ObjectUtils.getValue(obj, 'some.missing.property')).toBeUndefined();
+    });
+
+    it('should return undefined when getting value for missing target', () => {
+        expect(ObjectUtils.getValue(null, 'id')).toBeUndefined();
+    });
+
+});

ng2-components/ng2-alfresco-core/src/utils/object-utils.ts

@@ -0,0 +1,50 @@
+/*!
+ * @license
+ * Copyright 2016 Alfresco Software, Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+export class ObjectUtils {
+    /**
+     * Gets a value from an object by composed key
+     * ObjectUtils.getValue({ item: { nodeType: 'cm:folder' }}, 'item.nodeType') ==> 'cm:folder'
+     * @param target
+     * @param key
+     * @returns {string}
+     */
+    static getValue(target: any, key: string): any {
+
+        if (!target) {
+            return undefined;
+        }
+
+        let keys = key.split('.');
+        key = '';
+
+        do {
+            key += keys.shift();
+            let value = target[key];
+            if (value !== undefined && (typeof value === 'object' || !keys.length)) {
+                target = value;
+                key = '';
+            } else if (!keys.length) {
+                target = undefined;
+            } else {
+                key += '.';
+            }
+        } while (keys.length);
+
+        return target;
+    }
+}