mgr/dashboard: Verify the RGW mail reset behavior

The current behavior when submitting an empty mail field in the RGW user form
that was previously filled was to replace it with "false".

This was a regression introduced through the use of "CdFormGroup" which had
a "_filterValue" method which converted empty strings into false, but it was
removed now.

Fixes: http://tracker.ceph.com/issues/26861
Signed-off-by: Stephan Müller <smueller@suse.com>

src/pybind/mgr/dashboard/frontend/src/app/ceph/rgw/rgw-user-form/rgw-user-form.component.spec.ts

@@ -15,6 +15,8 @@ import { RgwUserFormComponent } from './rgw-user-form.component';
 describe('RgwUserFormComponent', () => {
   let component: RgwUserFormComponent;
   let fixture: ComponentFixture<RgwUserFormComponent>;
+  let rgwUserService: RgwUserService;
+  let formHelper: FormHelper;
 
   configureTestBed({
     declarations: [RgwUserFormComponent],
@@ -26,17 +28,16 @@ describe('RgwUserFormComponent', () => {
     fixture = TestBed.createComponent(RgwUserFormComponent);
     component = fixture.componentInstance;
     fixture.detectChanges();
+    rgwUserService = TestBed.get(RgwUserService);
+    formHelper = new FormHelper(component.userForm);
   });
 
   it('should create', () => {
     expect(component).toBeTruthy();
   });
 
   describe('s3 key management', () => {
-    let rgwUserService: RgwUserService;
-
     beforeEach(() => {
-      rgwUserService = TestBed.get(RgwUserService);
       spyOn(rgwUserService, 'addS3Key').and.stub();
     });
 
@@ -113,13 +114,8 @@ describe('RgwUserFormComponent', () => {
   });
 
   describe('username validation', () => {
-    let rgwUserService: RgwUserService;
-    let formHelper: FormHelper;
-
     beforeEach(() => {
-      rgwUserService = TestBed.get(RgwUserService);
       spyOn(rgwUserService, 'enumerate').and.returnValue(observableOf(['abc', 'xyz']));
-      formHelper = new FormHelper(component.userForm);
     });
 
     it('should validate that username is required', () => {
@@ -144,4 +140,19 @@ describe('RgwUserFormComponent', () => {
       })
     );
   });
+
+  describe('onSubmit', () => {
+    it('should be able to clear the mail field on update', () => {
+      spyOn(rgwUserService, 'update');
+      component.editing = true;
+      formHelper.setValue('email', '', true);
+      component.onSubmit();
+      expect(rgwUserService.update).toHaveBeenCalledWith(null, {
+        display_name: null,
+        email: '',
+        max_buckets: 1000,
+        suspended: false
+      });
+    });
+  });
 });