tests(theme-shared): add loading.directive.spec

#2537

npm/ng-packs/packages/theme-shared/src/lib/tests/loading.directive.spec.ts

@@ -0,0 +1,82 @@
+import { SpectatorDirective, createDirectiveFactory } from '@ngneat/spectator/jest';
+import { LoadingDirective } from '../directives';
+import { LoadingComponent } from '../components';
+
+import { Component } from '@angular/core';
+
+@Component({
+  selector: 'abp-dummy',
+  template: '<div id="dummy">Testing Loading Directive</div>',
+})
+export class DummyComponent {}
+
+describe('LoadingDirective', () => {
+  let spectator: SpectatorDirective<LoadingDirective>;
+  const createDirective = createDirectiveFactory({
+    directive: LoadingDirective,
+    declarations: [LoadingComponent, DummyComponent],
+    entryComponents: [LoadingComponent],
+  });
+
+  describe('default', () => {
+    beforeEach(() => {
+      spectator = createDirective('<div [abpLoading]="status">Testing Loading Directive</div>', {
+        hostProps: { status: true },
+      });
+    });
+
+    it('should create the loading component', done => {
+      setTimeout(() => {
+        expect(spectator.directive.rootNode).toBeTruthy();
+        expect(spectator.directive.componentRef).toBeTruthy();
+        done();
+      }, 0);
+    });
+  });
+
+  describe('with custom target', () => {
+    const mockTarget = document.createElement('div');
+    const spy = jest.spyOn(mockTarget, 'appendChild');
+
+    beforeEach(() => {
+      spectator = createDirective(
+        '<div [abpLoading]="status" [abpLoadingTargetElement]="target">Testing Loading Directive</div>',
+        {
+          hostProps: { status: true, target: mockTarget },
+        },
+      );
+    });
+
+    it('should add the loading component to the DOM', done => {
+      setTimeout(() => {
+        expect(spy).toHaveBeenCalled();
+        done();
+      }, 0);
+    });
+
+    it('should remove the loading component to the DOM', done => {
+      const spy = jest.spyOn(spectator.directive['renderer'], 'removeChild');
+      spectator.setHostInput({ status: false });
+      setTimeout(() => {
+        expect(spy).toHaveBeenCalled();
+        expect(spectator.directive.rootNode).toBeFalsy();
+        done();
+      }, 0);
+    });
+  });
+
+  describe('with a component selector', () => {
+    beforeEach(() => {
+      spectator = createDirective('<abp-dummy [abpLoading]="status"></abp-dummy>', {
+        hostProps: { status: true },
+      });
+    });
+
+    it('should select the child element', done => {
+      setTimeout(() => {
+        expect(spectator.directive.targetElement.id).toBe('dummy');
+        done();
+      }, 0);
+    });
+  });
+});