fix(navigation): move onWillDismiss and onDidDismiss, add unit tests

Author: mattbryan9

src/navigation/test/view-controller.spec.ts

@@ -1,4 +1,4 @@
-import { mockView } from '../../util/mock-providers';
+import { mockNavController, mockView, mockViews } from '../../util/mock-providers';
 
 
 describe('ViewController', () => {
@@ -87,6 +87,38 @@ describe('ViewController', () => {
     }, 10000);
   });
 
+  describe('willDismiss', () => {
+    it('should have data in the willDismiss', (done) => {
+      // arrange
+      let viewController = mockView();
+      let navControllerBase = mockNavController();
+      mockViews(navControllerBase, [viewController]);
+
+      viewController.onWillDismiss((data: any) => {
+        expect(data).toEqual('willDismiss data');
+        done();
+      });
+
+      viewController.dismiss('willDismiss data');
+    }, 10000);
+  });
+
+  describe('didDismiss', () => {
+    it('should have data in the didDismiss', (done) => {
+      // arrange
+      let viewController = mockView();
+      let navControllerBase = mockNavController();
+      mockViews(navControllerBase, [viewController]);
+
+      viewController.onDidDismiss((data: any) => {
+        expect(data).toEqual('didDismiss data');
+        done();
+      });
+
+      viewController.dismiss('didDismiss data');
+    }, 10000);
+  });
+
   afterEach(() => {
     if (subscription) {
       subscription.unsubscribe();

src/navigation/view-controller.ts

@@ -179,7 +179,7 @@ export class ViewController {
     this._onWillDismiss && this._onWillDismiss(data, role);
     return this._nav.remove(this._nav.indexOf(this), 1, options).then(() => {
       this._onDidDismiss && this._onDidDismiss(data, role);
-      this._onWillDismiss = null;
+      this._onDidDismiss = null;
       return data;
     });
   }
@@ -515,7 +515,7 @@ export class ViewController {
       }
     }
 
-    this._nav = this._cmp = this.instance = this._cntDir = this._cntRef = this._hdrDir = this._ftrDir = this._nb = this._onDidDismiss = null;
+    this._nav = this._cmp = this.instance = this._cntDir = this._cntRef = this._hdrDir = this._ftrDir = this._nb = this._onWillDismiss = null;
   }
 
   /**