diff --git a/ng2-components/ng2-activiti-form/src/components/widgets/dropdown/dropdown.widget.spec.ts b/ng2-components/ng2-activiti-form/src/components/widgets/dropdown/dropdown.widget.spec.ts
new file mode 100644
index 0000000000..2fdaf83374
--- /dev/null
+++ b/ng2-components/ng2-activiti-form/src/components/widgets/dropdown/dropdown.widget.spec.ts
@@ -0,0 +1,212 @@
+/*!
+ * @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, beforeEach } from '@angular/core/testing';
+import { Http, RequestOptionsArgs, Response, ResponseOptions } from '@angular/http';
+import { Observable } from 'rxjs/Rx';
+import { DropdownWidget } from './dropdown.widget';
+import { FormModel } from './../core/form.model';
+import { FormFieldModel } from './../core/form-field.model';
+
+describe('DropdownWidget', () => {
+
+    let http: Http;
+    let widget: DropdownWidget;
+
+    beforeEach(() => {
+        http = <Http> {
+            get(url: string, options?: RequestOptionsArgs): Observable<Response> {
+                return null;
+            }
+        };
+        widget = new DropdownWidget(http);
+    });
+
+    it('should fetch and parse REST data on init', () => {
+
+        let data = [
+            { uid: '1', text: 'One' },
+            { uid: '2', text: 'Two' }
+        ];
+
+        spyOn(http, 'get').and.callFake((url) => {
+            return Observable.create(observer => {
+                let options = new ResponseOptions({
+                    body: data,
+                    url: url
+                });
+                let response = new Response(options);
+                observer.next(response);
+                observer.complete();
+            });
+        });
+
+        let field = new FormFieldModel(new FormModel(), {
+            optionType: 'rest',
+            restUrl: 'http://<address>',
+            restIdProperty: 'uid',
+            restLabelProperty: 'text'
+        });
+
+        widget.field = field;
+        widget.ngOnInit();
+
+
+        expect((<any>http.get).calls.argsFor(0)).toEqual([field.restUrl]);
+        expect(field.options.length).toBe(2);
+
+        expect(field.options[0].id).toBe(data[0].uid);
+        expect(field.options[0].name).toBe(data[0].text);
+
+        expect(field.options[1].id).toBe(data[1].uid);
+        expect(field.options[1].name).toBe(data[1].text);
+    });
+
+    it('should require REST settings to fetch data', () => {
+        let form = new FormModel();
+        spyOn(http, 'get').and.stub();
+
+        // 1) Null field
+        widget.field = null;
+        widget.ngOnInit();
+        expect(http.get).not.toHaveBeenCalled();
+
+        // 2) Missing [optionType]
+        widget.field = new FormFieldModel(form, {
+            optionType: null,
+            restUrl: 'http://<address>',
+            restIdProperty: 'uid',
+            restLabelProperty: 'text'
+        });
+        widget.ngOnInit();
+        expect(http.get).not.toHaveBeenCalled();
+
+        // 3) Missing [restUrl]
+        widget.field = new FormFieldModel(form, {
+            optionType: 'rest',
+            restUrl: null,
+            restIdProperty: 'uid',
+            restLabelProperty: 'text'
+        });
+        widget.ngOnInit();
+        expect(http.get).not.toHaveBeenCalled();
+
+        // 4) Missing [restIdProperty]
+        widget.field = new FormFieldModel(form, {
+            optionType: 'rest',
+            restUrl: 'http://<address>',
+            restIdProperty: null,
+            restLabelProperty: 'text'
+        });
+        widget.ngOnInit();
+        expect(http.get).not.toHaveBeenCalled();
+
+        // 4) Missing [restLabelProperty]
+        widget.field = new FormFieldModel(form, {
+            optionType: 'rest',
+            restUrl: 'http://<address>',
+            restIdProperty: null,
+            restLabelProperty: null
+        });
+        widget.ngOnInit();
+        expect(http.get).not.toHaveBeenCalled();
+    });
+
+    it('should parse only array response', () => {
+        expect(widget.loadFromJson([])).toBeFalsy();
+
+        widget.field = new FormFieldModel(new FormModel());
+        expect(widget.loadFromJson([])).toBeTruthy();
+
+        expect(widget.loadFromJson(null)).toBeFalsy();
+        expect(widget.loadFromJson({})).toBeFalsy();
+    });
+
+    it('should bind to nested properties', () => {
+        let data = [
+            { uid: { value: 1 }, name: { fullName: 'John Doe' } }
+        ];
+
+        spyOn(http, 'get').and.callFake((url) => {
+            return Observable.create(observer => {
+                let options = new ResponseOptions({
+                    body: data,
+                    url: url
+                });
+                let response = new Response(options);
+                observer.next(response);
+                observer.complete();
+            });
+        });
+
+        let field = new FormFieldModel(new FormModel(), {
+            optionType: 'rest',
+            restUrl: 'http://<address>',
+            restIdProperty: 'uid.value',
+            restLabelProperty: 'name.fullName'
+        });
+
+        widget.field = field;
+        widget.ngOnInit();
+
+        expect(field.options.length).toBe(1);
+        expect(field.options[0].id).toBe(data[0].uid.value.toString());
+        expect(field.options[0].name).toBe(data[0].name.fullName);
+    });
+
+    it('should update form upon loading REST data', () => {
+        let field = new FormFieldModel(new FormModel());
+        widget.field = field;
+
+        spyOn(field, 'updateForm').and.stub();
+
+        expect(widget.loadFromJson([])).toBeTruthy();
+        expect(field.updateForm).toHaveBeenCalled();
+    });
+
+    it('should handle error with generic message', () => {
+        spyOn(console, 'error').and.stub();
+
+        widget.handleError(null);
+        expect(console.error).toHaveBeenCalledWith(DropdownWidget.UNKNOWN_ERROR_MESSAGE);
+    });
+
+    it('should handle error with error message', () => {
+        spyOn(console, 'error').and.stub();
+
+        const message = '<error>';
+        widget.handleError({ message: message });
+
+        expect(console.error).toHaveBeenCalledWith(message);
+    });
+
+    it('should handle error with detailed message', () => {
+        spyOn(console, 'error').and.stub();
+        widget.handleError({
+            status: '400',
+            statusText: 'Bad request'
+        });
+        expect(console.error).toHaveBeenCalledWith('400 - Bad request');
+    });
+
+    it('should handle error with generic message', () => {
+        spyOn(console, 'error').and.stub();
+        widget.handleError({});
+        expect(console.error).toHaveBeenCalledWith(DropdownWidget.GENERIC_ERROR_MESSAGE);
+    });
+
+});
diff --git a/ng2-components/ng2-activiti-form/src/components/widgets/dropdown/dropdown.widget.ts b/ng2-components/ng2-activiti-form/src/components/widgets/dropdown/dropdown.widget.ts
index c5d61526e5..5e47fd41b9 100644
--- a/ng2-components/ng2-activiti-form/src/components/widgets/dropdown/dropdown.widget.ts
+++ b/ng2-components/ng2-activiti-form/src/components/widgets/dropdown/dropdown.widget.ts
@@ -16,7 +16,6 @@
  */
 
 import { Component, OnInit } from '@angular/core';
-import { Observable } from 'rxjs/Rx';
 import { Http } from '@angular/http';
 import { ObjectUtils } from 'ng2-alfresco-core';
 import { WidgetComponent } from './../widget.component';
@@ -32,6 +31,9 @@ declare var componentHandler;
 })
 export class DropdownWidget extends WidgetComponent implements OnInit {
 
+    static UNKNOWN_ERROR_MESSAGE: string = 'Unknown error';
+    static GENERIC_ERROR_MESSAGE: string = 'Server error';
+
     constructor(private http: Http) {
         super();
     }
@@ -51,13 +53,12 @@ export class DropdownWidget extends WidgetComponent implements OnInit {
                 },
                 this.handleError
             );
-
         }
     }
 
     // TODO: support 'restResponsePath'
-    private loadFromJson(json: any) {
-        if (json instanceof Array) {
+    loadFromJson(json: any): boolean {
+        if (this.field && json && json instanceof Array) {
             let options = json.map(obj => {
                 return {
                     id: ObjectUtils.getValue(obj, this.field.restIdProperty).toString(),
@@ -66,16 +67,19 @@ export class DropdownWidget extends WidgetComponent implements OnInit {
             });
             this.field.options = options;
             this.field.updateForm();
+            return true;
         }
+        return false;
     }
 
-    private handleError (error: any) {
-        // In a real world app, we might use a remote logging infrastructure
-        // We'd also dig deeper into the error to get a better message
-        let errMsg = (error.message) ? error.message :
-            error.status ? `${error.status} - ${error.statusText}` : 'Server error';
-        console.error(errMsg); // log to console instead
-        return Observable.throw(errMsg);
+
+    handleError(error: any) {
+        let errMsg = DropdownWidget.UNKNOWN_ERROR_MESSAGE;
+        if (error) {
+            errMsg = (error.message) ? error.message :
+                error.status ? `${error.status} - ${error.statusText}` : DropdownWidget.GENERIC_ERROR_MESSAGE;
+        }
+        console.error(errMsg);
     }
 
 }
diff --git a/ng2-components/ng2-activiti-form/src/components/widgets/hyperlink/hyperlink.widget.spec.ts b/ng2-components/ng2-activiti-form/src/components/widgets/hyperlink/hyperlink.widget.spec.ts
new file mode 100644
index 0000000000..9b6be175ae
--- /dev/null
+++ b/ng2-components/ng2-activiti-form/src/components/widgets/hyperlink/hyperlink.widget.spec.ts
@@ -0,0 +1,97 @@
+/*!
+ * @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, beforeEach } from '@angular/core/testing';
+import { HyperlinkWidget } from './hyperlink.widget';
+import { FormModel } from './../core/form.model';
+import { FormFieldModel } from './../core/form-field.model';
+
+describe('HyperlinkWidget', () => {
+
+    let widget: HyperlinkWidget;
+
+    beforeEach(() => {
+        widget = new HyperlinkWidget();
+    });
+
+    it('should get link text from field display text', () => {
+        const text = 'hello world';
+
+        widget.field = new FormFieldModel(new FormModel(), {
+            displayText: text
+        });
+
+        expect(widget.linkText).toBe(text);
+    });
+
+    it('should get link text from field url', () => {
+        const url = 'http://<address>';
+
+        widget.field = new FormFieldModel(new FormModel(), {
+            displayText: null,
+            hyperlinkUrl: url
+        });
+
+        expect(widget.linkText).toBe(url);
+    });
+
+    it('should require field to get link text', () => {
+        widget.field = null;
+        expect(widget.linkText).toBeNull();
+    });
+
+    it('should not return link text', () => {
+        widget.field = new FormFieldModel(new FormModel(), {
+            displayText: null,
+            hyperlinkUrl: null
+        });
+
+        expect(widget.linkText).toBeNull();
+    });
+
+    it('should return default url for missing field', () => {
+        widget.field = null;
+        expect(widget.linkUrl).toBe(HyperlinkWidget.DEFAULT_URL);
+    });
+
+    it('should return default url for missing field property', () => {
+        widget.field = new FormFieldModel(new FormModel(), {
+            hyperlinkUrl: null
+        });
+
+        expect(widget.linkUrl).toBe(HyperlinkWidget.DEFAULT_URL);
+    });
+
+    it('should prepend url with scheme', () => {
+        const url = 'www.alfresco.com';
+        widget.field = new FormFieldModel(new FormModel(), {
+            hyperlinkUrl: url
+        });
+
+        expect(widget.linkUrl).toBe(`${HyperlinkWidget.DEFAULT_URL_SCHEME}${url}`);
+    });
+
+    it('should not prepend url with scheme', () => {
+        const url = 'https://<secure/address>';
+        widget.field = new FormFieldModel(new FormModel(), {
+            hyperlinkUrl: url
+        });
+
+        expect(widget.linkUrl).toBe(url);
+    });
+
+});
diff --git a/ng2-components/ng2-activiti-form/src/components/widgets/hyperlink/hyperlink.widget.ts b/ng2-components/ng2-activiti-form/src/components/widgets/hyperlink/hyperlink.widget.ts
index 5f7139efed..dd9c7e3fd2 100644
--- a/ng2-components/ng2-activiti-form/src/components/widgets/hyperlink/hyperlink.widget.ts
+++ b/ng2-components/ng2-activiti-form/src/components/widgets/hyperlink/hyperlink.widget.ts
@@ -29,21 +29,27 @@ declare var componentHandler;
 })
 export class HyperlinkWidget extends WidgetComponent {
 
+    static DEFAULT_URL: string = '#';
+    static DEFAULT_URL_SCHEME: string = 'http://';
+
     get linkUrl(): string {
-        let url = '#';
+        let url = HyperlinkWidget.DEFAULT_URL;
 
         if (this.field && this.field.hyperlinkUrl) {
             url = this.field.hyperlinkUrl;
             if (!/^https?:\/\//i.test(url)) {
-                url = 'http://' + url;
+                url = HyperlinkWidget.DEFAULT_URL_SCHEME + url;
             }
         }
 
         return url;
     }
 
-    get linkText() {
-        return this.field.displayText || this.field.hyperlinkUrl;
+    get linkText(): string {
+        if (this.field) {
+            return this.field.displayText || this.field.hyperlinkUrl;
+        }
+        return null;
     }
 
 }
diff --git a/ng2-components/ng2-activiti-form/src/components/widgets/tabs/tabs.widget.spec.ts b/ng2-components/ng2-activiti-form/src/components/widgets/tabs/tabs.widget.spec.ts
new file mode 100644
index 0000000000..2ffc23f974
--- /dev/null
+++ b/ng2-components/ng2-activiti-form/src/components/widgets/tabs/tabs.widget.spec.ts
@@ -0,0 +1,60 @@
+/*!
+ * @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, beforeEach } from '@angular/core/testing';
+import { TabsWidget } from './tabs.widget';
+import { TabModel } from './../core/tab.model';
+
+describe('TabsWidget', () => {
+
+    let componentHandler;
+    let widget: TabsWidget;
+
+    beforeEach(() => {
+        widget = new TabsWidget();
+
+        componentHandler = jasmine.createSpyObj('componentHandler', [
+            'upgradeAllRegistered'
+        ]);
+
+        window['componentHandler'] = componentHandler;
+    });
+
+    it('should check tabs', () => {
+        widget.tabs = null;
+        expect(widget.hasTabs()).toBeFalsy();
+
+        widget.tabs = [];
+        expect(widget.hasTabs()).toBeFalsy();
+
+        widget.tabs = [new TabModel(null)];
+        expect(widget.hasTabs()).toBeTruthy();
+    });
+
+    it('should upgrade MDL content on view init', () => {
+        widget.ngAfterViewInit();
+        expect(componentHandler.upgradeAllRegistered).toHaveBeenCalled();
+    });
+
+    it('should setup MDL content only if component handler available', () => {
+        expect(widget.setupMaterialComponents()).toBeTruthy();
+
+        window['componentHandler'] = null;
+        expect(widget.setupMaterialComponents()).toBeFalsy();
+    });
+
+});
diff --git a/ng2-components/ng2-activiti-form/src/components/widgets/tabs/tabs.widget.ts b/ng2-components/ng2-activiti-form/src/components/widgets/tabs/tabs.widget.ts
index acd9536b84..8c4d9de949 100644
--- a/ng2-components/ng2-activiti-form/src/components/widgets/tabs/tabs.widget.ts
+++ b/ng2-components/ng2-activiti-form/src/components/widgets/tabs/tabs.widget.ts
@@ -39,9 +39,15 @@ export class TabsWidget implements AfterViewInit {
     }
 
     ngAfterViewInit() {
+        this.setupMaterialComponents();
+    }
+
+    setupMaterialComponents(): boolean {
         // workaround for MDL issues with dynamic components
         if (componentHandler) {
             componentHandler.upgradeAllRegistered();
+            return true;
         }
+        return false;
     }
 }