fix(material/dialog): provide defaults for dialog animation

Even though we provide defaults when we construct the animation object, some internal cases break because there are no defaults in the animation definition itself. These changes provide the defaults in the animation definition as well.

Author: crisbeto

src/material/dialog/dialog-animations.ts

@@ -17,6 +17,14 @@ import {
   group,
 } from '@angular/animations';
 
+/**
+ * Default parameters for the animation for backwards compatibility.
+ * @docs-private
+ */
+export const defaultParams = {
+  params: {enterAnimationDuration: '150ms', exitAnimationDuration: '75ms'},
+};
+
 /**
  * Animations used by MatDialog.
  * @docs-private
@@ -40,13 +48,15 @@ export const matDialogAnimations: {
         ),
         query('@*', animateChild(), {optional: true}),
       ]),
+      defaultParams,
     ),
     transition(
       '* => void, * => exit',
       group([
         animate('{{exitAnimationDuration}} cubic-bezier(0.4, 0.0, 0.2, 1)', style({opacity: 0})),
         query('@*', animateChild(), {optional: true}),
       ]),
+      defaultParams,
     ),
   ]),
 };

src/material/dialog/dialog-container.ts

@@ -38,7 +38,7 @@ import {
   ViewChild,
   ViewEncapsulation,
 } from '@angular/core';
-import {matDialogAnimations} from './dialog-animations';
+import {matDialogAnimations, defaultParams} from './dialog-animations';
 import {MatDialogConfig} from './dialog-config';
 
 /** Event that captures the state of dialog container animations. */
@@ -365,8 +365,10 @@ export class MatDialogContainer extends _MatDialogContainerBase {
     return {
       value: this._state,
       params: {
-        enterAnimationDuration: this._config.enterAnimationDuration || '150ms',
-        exitAnimationDuration: this._config.exitAnimationDuration || '75ms',
+        enterAnimationDuration:
+          this._config.enterAnimationDuration || defaultParams.params.enterAnimationDuration,
+        exitAnimationDuration:
+          this._config.exitAnimationDuration || defaultParams.params.exitAnimationDuration,
       },
     };
   }

src/material/dialog/public-api.ts

@@ -12,4 +12,4 @@ export * from './dialog-container';
 export * from './dialog-content-directives';
 export * from './dialog-config';
 export * from './dialog-ref';
-export * from './dialog-animations';
+export {matDialogAnimations} from './dialog-animations';