fix(progressbar): toggle striped and animate states (#4581)

fixes #3864

src/progressbar/progressbar.component.ts

@@ -16,10 +16,23 @@ import { BarComponent } from './bar.component';
   ]
 })
 export class ProgressbarComponent {
-  /** if `true` changing value of progress bar will be animated*/
-  @Input() animate: boolean;
+  /** if `true` changing value of progress bar will be animated */
+  @Input()
+  set animate(value: boolean) {
+    this._animate = value;
+    this.bars.forEach((b: BarComponent) => {
+      b.animate = value;
+    });
+  }
   /** If `true`, striped classes are applied */
-  @Input() striped: boolean;
+  @Input()
+  set striped(value: boolean) {
+    this._striped = value;
+    this.bars.forEach((b: BarComponent) => {
+      b.striped = value;
+    });
+  }
+
   /** provide one of the four supported contextual classes: `success`, `info`, `warning`, `danger` */
   @Input() type: string;
   /** current value of progress bar. Could be a number or array of objects
@@ -31,6 +44,8 @@ export class ProgressbarComponent {
     this._value = value;
   }
   isStacked = false;
+  _striped: boolean;
+  _animate: boolean;
   _value: number | any[];
   get isBs3(): boolean {
     return isBs3();
@@ -60,8 +75,8 @@ export class ProgressbarComponent {
     Object.assign(this, config);
   }
   addBar(bar: BarComponent): void {
-    bar.animate = this.animate;
-    bar.striped = this.striped;
+    bar.animate = this._animate;
+    bar.striped = this._striped;
 
     this.bars.push(bar);
   }

src/spec/progressbar.component.spec.ts

@@ -13,6 +13,37 @@ class TestProgressbarComponent extends ProgressbarComponent {}
 describe('Component: Progress Bar', () => {
   let fixture: ComponentFixture<TestProgressbarComponent>;
   let element: any;
+  let component: ProgressbarComponent;
+
+  it('check animate setter when _animate is equal to setter\'s argument', () => {
+    TestBed.configureTestingModule({
+      declarations: [TestProgressbarComponent],
+      imports: [ProgressbarModule.forRoot()]
+    });
+    fixture = TestBed.createComponent(TestProgressbarComponent);
+    component = fixture.componentInstance;
+    component._animate = false;
+    component.bars = [{}];
+
+    component.animate = true;
+
+    expect(component._animate).toBeTruthy();
+  });
+
+  it('check striped setter when _striped is equal to setter\'s argument', () => {
+    TestBed.configureTestingModule({
+      declarations: [TestProgressbarComponent],
+      imports: [ProgressbarModule.forRoot()]
+    });
+    fixture = TestBed.createComponent(TestProgressbarComponent);
+    component = fixture.componentInstance;
+    component._striped = false;
+    component.bars = [{}];
+
+    component.striped = true;
+
+    expect(component._striped).toBeTruthy();
+  });
 
   it('should work correctly with default values', () => {
     const tpl = `<progressbar></progressbar>`;