Enhancement: improve doc details close behavior (#8937)

src-ui/src/app/services/component-router.service.spec.ts

@@ -0,0 +1,102 @@
+import { TestBed } from '@angular/core/testing'
+import { ActivationStart, Router } from '@angular/router'
+import { Subject } from 'rxjs'
+import { ComponentRouterService } from './component-router.service'
+
+describe('ComponentRouterService', () => {
+  let service: ComponentRouterService
+  let router: Router
+  let eventsSubject: Subject<any>
+
+  beforeEach(() => {
+    eventsSubject = new Subject<any>()
+    TestBed.configureTestingModule({
+      providers: [
+        ComponentRouterService,
+        {
+          provide: Router,
+          useValue: {
+            events: eventsSubject.asObservable(),
+          },
+        },
+      ],
+    })
+    service = TestBed.inject(ComponentRouterService)
+    router = TestBed.inject(Router)
+  })
+
+  it('should add to history and componentHistory on ActivationStart event', () => {
+    eventsSubject.next(
+      new ActivationStart({
+        url: 'test-url',
+        component: { name: 'TestComponent' },
+      } as any)
+    )
+
+    expect((service as any).history).toEqual(['test-url'])
+    expect((service as any).componentHistory).toEqual(['TestComponent'])
+  })
+
+  it('should not add duplicate component names to componentHistory', () => {
+    eventsSubject.next(
+      new ActivationStart({
+        url: 'test-url-1',
+        component: { name: 'TestComponent' },
+      } as any)
+    )
+    eventsSubject.next(
+      new ActivationStart({
+        url: 'test-url-2',
+        component: { name: 'TestComponent' },
+      } as any)
+    )
+
+    expect((service as any).componentHistory.length).toBe(1)
+    expect((service as any).componentHistory).toEqual(['TestComponent'])
+  })
+
+  it('should return the URL of the component before the current one', () => {
+    eventsSubject.next(
+      new ActivationStart({
+        url: 'test-url-1',
+        component: { name: 'TestComponent1' },
+      } as any)
+    )
+    eventsSubject.next(
+      new ActivationStart({
+        url: 'test-url-2',
+        component: { name: 'TestComponent2' },
+      } as any)
+    )
+
+    expect(service.getComponentURLBefore()).toBe('test-url-1')
+  })
+
+  it('should update the URL of the current component if the same component is loaded via a different URL', () => {
+    eventsSubject.next(
+      new ActivationStart({
+        url: 'test-url-1',
+        component: { name: 'TestComponent' },
+      } as any)
+    )
+    eventsSubject.next(
+      new ActivationStart({
+        url: 'test-url-2',
+        component: { name: 'TestComponent' },
+      } as any)
+    )
+
+    expect((service as any).history).toEqual(['test-url-2'])
+  })
+
+  it('should return null if there is no previous component', () => {
+    eventsSubject.next(
+      new ActivationStart({
+        url: 'test-url',
+        component: { name: 'TestComponent' },
+      } as any)
+    )
+
+    expect(service.getComponentURLBefore()).toBeNull()
+  })
+})