villebro commented on code in PR #22015:
URL: https://github.com/apache/superset/pull/22015#discussion_r1012567730


##########
superset-frontend/packages/superset-ui-core/test/utils/featureFlag.test.ts:
##########
@@ -16,48 +16,41 @@
  * specific language governing permissions and limitations
  * under the License.
  */
-
-import { FeatureFlag, isFeatureEnabled } from '@superset-ui/core';
-
-const originalFeatureFlags = window.featureFlags;
-// eslint-disable-next-line no-console
-const originalConsoleError = console.error;
-const reset = () => {
-  window.featureFlags = originalFeatureFlags;
-  // eslint-disable-next-line no-console
-  console.error = originalConsoleError;
-};
+import mockConsole from 'jest-mock-console';
+import { isFeatureEnabled, FeatureFlag } from '@superset-ui/core';
 
 it('returns false and raises console error if feature flags have not been 
initialized', () => {
-  // eslint-disable-next-line no-console
-  console.error = jest.fn();
-  delete (window as any).featureFlags;
-  
expect(isFeatureEnabled(FeatureFlag.ALLOW_DASHBOARD_DOMAIN_SHARDING)).toEqual(
-    false,
-  );
-
-  // eslint-disable-next-line no-console
-  expect(console.error).toHaveBeenNthCalledWith(
-    1,
-    'Failed to query feature flag ALLOW_DASHBOARD_DOMAIN_SHARDING (see error 
below)',
+  mockConsole();
+  Object.defineProperty(window, 'featureFlags', {
+    value: undefined,
+  });
+
+  expect(
+    isFeatureEnabled(FeatureFlag.ALLOW_DASHBOARD_DOMAIN_SHARDING),
+  ).toBeFalsy();
+  expect(console.error).toHaveBeenCalled();
+  // @ts-expect-error
+  expect(console.error.mock.calls[0][0]).toEqual(
+    'Failed to query feature flag ALLOW_DASHBOARD_DOMAIN_SHARDING',
   );
-
-  reset();
 });
 
 it('returns false for unset feature flag', () => {
-  
expect(isFeatureEnabled(FeatureFlag.ALLOW_DASHBOARD_DOMAIN_SHARDING)).toEqual(
-    false,
-  );
+  Object.defineProperty(window, 'featureFlags', {
+    value: {},
+  });
 
-  reset();
+  expect(
+    isFeatureEnabled(FeatureFlag.ALLOW_DASHBOARD_DOMAIN_SHARDING),
+  ).toBeFalsy();

Review Comment:
   same here



##########
superset-frontend/packages/superset-ui-core/test/utils/featureFlag.test.ts:
##########
@@ -16,48 +16,41 @@
  * specific language governing permissions and limitations
  * under the License.
  */
-
-import { FeatureFlag, isFeatureEnabled } from '@superset-ui/core';
-
-const originalFeatureFlags = window.featureFlags;
-// eslint-disable-next-line no-console
-const originalConsoleError = console.error;
-const reset = () => {
-  window.featureFlags = originalFeatureFlags;
-  // eslint-disable-next-line no-console
-  console.error = originalConsoleError;
-};
+import mockConsole from 'jest-mock-console';
+import { isFeatureEnabled, FeatureFlag } from '@superset-ui/core';
 
 it('returns false and raises console error if feature flags have not been 
initialized', () => {
-  // eslint-disable-next-line no-console
-  console.error = jest.fn();
-  delete (window as any).featureFlags;
-  
expect(isFeatureEnabled(FeatureFlag.ALLOW_DASHBOARD_DOMAIN_SHARDING)).toEqual(
-    false,
-  );
-
-  // eslint-disable-next-line no-console
-  expect(console.error).toHaveBeenNthCalledWith(
-    1,
-    'Failed to query feature flag ALLOW_DASHBOARD_DOMAIN_SHARDING (see error 
below)',
+  mockConsole();
+  Object.defineProperty(window, 'featureFlags', {
+    value: undefined,
+  });
+
+  expect(
+    isFeatureEnabled(FeatureFlag.ALLOW_DASHBOARD_DOMAIN_SHARDING),
+  ).toBeFalsy();

Review Comment:
   If we're expecting a `boolean` value (which this PR is making more 
specific), I'd prefer to make the assertion more specific, too:
   ```suggestion
     expect(
       isFeatureEnabled(FeatureFlag.ALLOW_DASHBOARD_DOMAIN_SHARDING),
     ).toEqual(false);
   ```



##########
superset-frontend/packages/superset-ui-core/test/utils/featureFlag.test.ts:
##########
@@ -16,48 +16,41 @@
  * specific language governing permissions and limitations
  * under the License.
  */
-
-import { FeatureFlag, isFeatureEnabled } from '@superset-ui/core';
-
-const originalFeatureFlags = window.featureFlags;
-// eslint-disable-next-line no-console
-const originalConsoleError = console.error;
-const reset = () => {
-  window.featureFlags = originalFeatureFlags;
-  // eslint-disable-next-line no-console
-  console.error = originalConsoleError;
-};
+import mockConsole from 'jest-mock-console';
+import { isFeatureEnabled, FeatureFlag } from '@superset-ui/core';
 
 it('returns false and raises console error if feature flags have not been 
initialized', () => {
-  // eslint-disable-next-line no-console
-  console.error = jest.fn();
-  delete (window as any).featureFlags;
-  
expect(isFeatureEnabled(FeatureFlag.ALLOW_DASHBOARD_DOMAIN_SHARDING)).toEqual(
-    false,
-  );
-
-  // eslint-disable-next-line no-console
-  expect(console.error).toHaveBeenNthCalledWith(
-    1,
-    'Failed to query feature flag ALLOW_DASHBOARD_DOMAIN_SHARDING (see error 
below)',
+  mockConsole();
+  Object.defineProperty(window, 'featureFlags', {
+    value: undefined,
+  });
+
+  expect(
+    isFeatureEnabled(FeatureFlag.ALLOW_DASHBOARD_DOMAIN_SHARDING),
+  ).toBeFalsy();
+  expect(console.error).toHaveBeenCalled();
+  // @ts-expect-error
+  expect(console.error.mock.calls[0][0]).toEqual(
+    'Failed to query feature flag ALLOW_DASHBOARD_DOMAIN_SHARDING',
   );
-
-  reset();
 });
 
 it('returns false for unset feature flag', () => {
-  
expect(isFeatureEnabled(FeatureFlag.ALLOW_DASHBOARD_DOMAIN_SHARDING)).toEqual(
-    false,
-  );
+  Object.defineProperty(window, 'featureFlags', {
+    value: {},
+  });
 
-  reset();
+  expect(
+    isFeatureEnabled(FeatureFlag.ALLOW_DASHBOARD_DOMAIN_SHARDING),
+  ).toBeFalsy();
 });
 
 it('returns true for set feature flag', () => {
-  window.featureFlags = {
-    [FeatureFlag.CLIENT_CACHE]: true,
-  };
+  Object.defineProperty(window, 'featureFlags', {
+    value: {
+      CLIENT_CACHE: true,
+    },
+  });
 
-  expect(isFeatureEnabled(FeatureFlag.CLIENT_CACHE)).toEqual(true);
-  reset();
+  expect(isFeatureEnabled(FeatureFlag.CLIENT_CACHE)).toBeTruthy();

Review Comment:
   and here



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