How to use the @ephox/agar.Assertions.assertEq function in @ephox/agar

Chain.op((v) => {
        // Should be dirty after user input but remain untouched
        fakeKeyUp(v.editorComponent.editor, 'X');
        v.fixture.detectChanges();

        Assertions.assertEq('ngModel should not be pristine', false, v.ngModel.pristine);
        Assertions.assertEq('ngModel should not be touched', false, v.ngModel.touched);

        // If the editor loses focus, it should should remain dirty but should also turn touched
        v.editorComponent.editor.fire('blur');
        v.fixture.detectChanges();

        Assertions.assertEq('ngModel should not be pristine', false, v.ngModel.pristine);
        Assertions.assertEq('ngModel should be touched', true, v.ngModel.touched);
      }),
      cTeardown

Chain.op((v) => {
        // Should be dirty after user input but remain untouched
        fakeKeyUp(v.editorComponent.editor, 'X');
        v.fixture.detectChanges();

        Assertions.assertEq('ngModel should not be pristine', false, v.ngModel.pristine);
        Assertions.assertEq('ngModel should not be touched', false, v.ngModel.touched);

        // If the editor loses focus, it should should remain dirty but should also turn touched
        v.editorComponent.editor.fire('blur');
        v.fixture.detectChanges();

        Assertions.assertEq('ngModel should not be pristine', false, v.ngModel.pristine);
        Assertions.assertEq('ngModel should be touched', true, v.ngModel.touched);
      }),
      cTeardown

Chain.op((v) => {
        Assertions.assertEq('ngModel should be valid', true, v.ngModel.valid);
        Assertions.assertEq('ngModel should be pristine', true, v.ngModel.pristine);
        Assertions.assertEq('ngModel should not be touched', false, v.ngModel.touched);
      }),
      cTeardown

Chain.op((v) => {
        v.editorComponent.writeValue('New Value');
        v.fixture.detectChanges();

        Assertions.assertEq('ngModel should be valid', true, v.ngModel.valid);
        Assertions.assertEq('ngModel should be pristine', true, v.ngModel.pristine);
        Assertions.assertEq('ngModel should not be touched', false, v.ngModel.touched);

        Assertions.assertEq(
          'Value should have been written to the editor',
          v.editorComponent.editor.getContent({ format: 'text' }),
          'New Value'
        );
      }),
      cTeardown

Chain.op((v) => {
        v.editorComponent.writeValue('New Value');
        v.fixture.detectChanges();

        Assertions.assertEq('ngModel should be valid', true, v.ngModel.valid);
        Assertions.assertEq('ngModel should be pristine', true, v.ngModel.pristine);
        Assertions.assertEq('ngModel should not be touched', false, v.ngModel.touched);

        Assertions.assertEq(
          'Value should have been written to the editor',
          v.editorComponent.editor.getContent({ format: 'text' }),
          'New Value'
        );
      }),
      cTeardown

Chain.op((v) => {
        Assertions.assertEq('ngModel should be valid', true, v.ngModel.valid);
        Assertions.assertEq('ngModel should be pristine', true, v.ngModel.pristine);
        Assertions.assertEq('ngModel should not be touched', false, v.ngModel.touched);
      }),
      cTeardown