fix(platform): add missing methods to platform

platform mock is breaking slides as it's missing some hidden methods

BREAKING CHANGE: registerCallBackButtonAction has been changed

Author: stonelasley

src/angular/platform.spec.ts

@@ -0,0 +1,29 @@
+import {PlatformMock} from './platform';
+
+describe('PlatformMock', () => {
+    let classUnderTest;
+
+    beforeEach(() => {
+        classUnderTest = PlatformMock.instance();
+    });
+
+    describe('dir', () => {
+        it('should return empty string', () => {
+            expect(classUnderTest.dir()).toEqual('');
+        });
+    });
+
+    describe('hasFocus', () => {
+        it('should return true', () => {
+            expect(classUnderTest.hasFocus()).toBeTruthy();
+        });
+    });
+
+    describe('registerListener', () => {
+        let callback = () => 'foo';
+
+        it('should return function that was passed in', () => {
+            expect(classUnderTest.registerListener(callback).call()).toEqual('foo');
+        });
+    });
+});

src/angular/platform.ts

@@ -26,7 +26,10 @@ export class PlatformMock {
             'registerListener',
             'win',
             'getActiveElement',
-            'raf'
+            'raf',
+            'hasFocus',
+            'getElementComputedStyle',
+            'timeout'
         ]);
 
         instance.dir.and.returnValue('');
@@ -38,16 +41,23 @@ export class PlatformMock {
         instance.lang.and.returnValue('en');
         instance.platforms.and.returnValue([]);
         instance.ready.and.returnValue(Promise.resolve());
-        instance.registerBackButtonAction.and.returnValue(() => {
-        });
+        instance.registerBackButtonAction.and.callFake(callback => callback);
+        instance.registerListener.and.callFake(callback => callback);
         instance.url.and.returnValue('');
         instance.version.and.returnValue([]);
         instance.width.and.returnValue(0);
         instance.doc.and.returnValue(document);
         instance.win.and.returnValue(window);
         instance.getActiveElement.and.returnValue(document['activeElement']);
         instance.raf.and.returnValue(1);
-
+        instance.hasFocus.and.returnValue(true);
+        instance.getElementComputedStyle.and.returnValue({
+            paddingLeft: '10',
+            paddingTop: '10',
+            paddingRight: '10',
+            paddingBottom: '10'
+        });
+        instance.timeout.and.callFake((callback: any, timer: number) => setTimeout(callback, timer));
         return instance;
     }
 }