Merge pull request #1983 from satanTime/issues/1957

test: covering #1957

Author: satanTime

tests/issue-1957/test.spec.ts

@@ -0,0 +1,48 @@
+import { CommonModule, DatePipe } from '@angular/common';
+import { Component, NgModule } from '@angular/core';
+import { MockBuilder, MockRender, ngMocks } from 'ng-mocks';
+
+@Component({
+  selector: 'target',
+  template: `{{ '2022-03-03' | date }}`,
+})
+class TargetComponent {}
+
+@NgModule({
+  declarations: [TargetComponent],
+  imports: [CommonModule],
+})
+class TargetModule {}
+
+// @see https://github.com/ike18t/ng-mocks/issues/1957
+describe('issue-1957:MockBuilder', () => {
+  describe('mock', () => {
+    const dateSpy = (value: string) => value.length;
+    ngMocks.faster();
+
+    beforeAll(() =>
+      MockBuilder(TargetComponent, TargetModule).mock(
+        DatePipe,
+        dateSpy,
+      ),
+    );
+
+    it('uses a mock', () => {
+      const fixture = MockRender(TargetComponent);
+      const text = ngMocks.formatText(fixture);
+      expect(text).toEqual('10');
+    });
+  });
+
+  describe('restored', () => {
+    ngMocks.faster();
+
+    beforeAll(() => MockBuilder(TargetComponent, TargetModule));
+
+    it('uses a mock', () => {
+      const fixture = MockRender(TargetComponent);
+      const text = ngMocks.formatText(fixture);
+      expect(text).toEqual('Mar 3, 2022');
+    });
+  });
+});