fix(module:image): unsubscribe old src (#7102)

Co-authored-by: jiangchunlin <jiang_c_l@foxmail.com>
NG-ZORRO · Jan 14, 2022 · 87a3e27 · 87a3e27
1 parent b12f43a
commit 87a3e27
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Showing 2 changed files with 84 additions and 5 deletions.
diff --git a/components/image/image.directive.ts b/components/image/image.directive.ts
@@ -51,7 +51,8 @@ export class NzImageDirective implements OnInit, OnChanges, OnDestroy {
 
   dir?: Direction;
   backLoadImage!: HTMLImageElement;
-  private status: ImageStatusType = 'normal';
+  status: ImageStatusType = 'normal';
+  private backLoadDestroy$: Subject<void> = new Subject();
   private destroy$: Subject<void> = new Subject();
 
   get previewable(): boolean {
@@ -129,6 +130,10 @@ export class NzImageDirective implements OnInit, OnChanges, OnDestroy {
     this.backLoadImage.srcset = this.nzSrcset;
     this.status = 'loading';
 
+    // unsubscribe last backLoad
+    this.backLoadDestroy$.next();
+    this.backLoadDestroy$.complete();
+    this.backLoadDestroy$ = new Subject();
     if (this.backLoadImage.complete) {
       this.status = 'normal';
       this.getElement().nativeElement.src = this.nzSrc;
@@ -145,15 +150,15 @@ export class NzImageDirective implements OnInit, OnChanges, OnDestroy {
       // The `nz-image` directive can be destroyed before the `load` or `error` event is dispatched,
       // so there's no sense to keep capturing `this`.
       fromEvent(this.backLoadImage, 'load')
-        .pipe(takeUntil(this.destroy$))
+        .pipe(takeUntil(this.backLoadDestroy$), takeUntil(this.destroy$))
         .subscribe(() => {
           this.status = 'normal';
           this.getElement().nativeElement.src = this.nzSrc;
           this.getElement().nativeElement.srcset = this.nzSrcset;
         });
 
       fromEvent(this.backLoadImage, 'error')
-        .pipe(takeUntil(this.destroy$))
+        .pipe(takeUntil(this.backLoadDestroy$), takeUntil(this.destroy$))
         .subscribe(() => {
           this.status = 'error';
           if (this.nzFallback) {

diff --git a/components/image/image.spec.ts b/components/image/image.spec.ts
@@ -39,14 +39,74 @@ import {
   NzImageService
 } from 'ng-zorro-antd/image';
 
-const SRC = 'https://zos.alipayobjects.com/rmsportal/jkjgkEfvpUPVyRjUImniVslZfWPnJuuZ.png`';
+const SRC = 'https://zos.alipayobjects.com/rmsportal/jkjgkEfvpUPVyRjUImniVslZfWPnJuuZ.png';
 const QUICK_SRC =
   'data:image/svg+xml;base64,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';
 const PLACEHOLDER =
   'https://zos.alipayobjects.com/rmsportal/jkjgkEfvpUPVyRjUImniVslZfWPnJuuZ.png?x-oss-process=image/blur,r_50,s_50/quality,q_1/resize,m_mfit,h_200,w_200';
 const FALLBACK =
   'data:image/png;base64,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';
 
+describe('Basics', () => {
+  let fixture: ComponentFixture<TestImageBasicsComponent>;
+  let context: TestImageBasicsComponent;
+  let debugElement: DebugElement;
+
+  beforeEach(fakeAsync(() => {
+    TestBed.configureTestingModule({
+      imports: [NzImageModule, TestImageModule, NoopAnimationsModule],
+      providers: [{ provide: Overlay, useClass: Overlay }]
+    });
+    TestBed.compileComponents();
+  }));
+
+  beforeEach(() => {
+    fixture = TestBed.createComponent(TestImageBasicsComponent);
+    fixture.detectChanges();
+    context = fixture.componentInstance;
+    debugElement = fixture.debugElement;
+  });
+
+  it('should only latest src work', fakeAsync(() => {
+    const ERROR_SRC = 'error.png';
+    context.src = ERROR_SRC;
+    context.placeholder = null;
+    const image = debugElement.nativeElement.querySelector('img');
+    fixture.detectChanges();
+    const oldBackLoadImage = context.nzImage.backLoadImage;
+    context.src = SRC;
+    fixture.detectChanges();
+    tick(1000);
+    context.nzImage.backLoadImage.dispatchEvent(new Event('load'));
+    fixture.detectChanges();
+    expect(image.src).toBe(SRC);
+    tick(1000);
+    oldBackLoadImage.dispatchEvent(new ErrorEvent('error'));
+    fixture.detectChanges();
+    expect(image.src).toBe(SRC);
+    expect(context.nzImage.status).toBe('normal');
+  }));
+
+  it('should keep placeholder when latest src is loading', fakeAsync(() => {
+    context.src = SRC;
+    context.placeholder = PLACEHOLDER;
+    const image = debugElement.nativeElement.querySelector('img');
+    fixture.detectChanges();
+    const oldBackLoadImage = context.nzImage.backLoadImage;
+    const SECOND_SRC = 'https://test.com/SECOND_SRC.png';
+    context.src = SECOND_SRC;
+    fixture.detectChanges();
+    tick(1000);
+    oldBackLoadImage.dispatchEvent(new Event('load'));
+    fixture.detectChanges();
+    expect(image.src).toBe(PLACEHOLDER);
+    tick(1000);
+    context.nzImage.backLoadImage.dispatchEvent(new Event('load'));
+    fixture.detectChanges();
+    expect(image.src).toBe(SECOND_SRC);
+  }));
+});
+
 describe('Placeholder', () => {
   let fixture: ComponentFixture<TestImagePlaceholderComponent>;
   let context: TestImagePlaceholderComponent;
@@ -466,6 +526,15 @@ describe('Preview', () => {
   });
 });
 
+@Component({
+  template: ` <img nz-image [nzSrc]="src" [nzPlaceholder]="placeholder" /> `
+})
+export class TestImageBasicsComponent {
+  @ViewChild(NzImageDirective) nzImage!: NzImageDirective;
+  src = '';
+  placeholder: string | null = '';
+}
+
 @Component({
   template: ` <img nz-image [nzSrc]="src" [nzPlaceholder]="placeholder" [nzDisablePreview]="disablePreview" /> `
 })
@@ -511,7 +580,12 @@ export class TestImagePreviewGroupComponent {
   }
 }
 
-const TEST_COMPONENTS = [TestImageFallbackComponent, TestImagePlaceholderComponent, TestImagePreviewGroupComponent];
+const TEST_COMPONENTS = [
+  TestImageBasicsComponent,
+  TestImageFallbackComponent,
+  TestImagePlaceholderComponent,
+  TestImagePreviewGroupComponent
+];
 
 @NgModule({
   imports: [NzImageModule],