iOS unit test: How to unit test firstResponderStatus

Question

I am writing a test to confirm the if a method shifts the focus to next textField. I tried the code from iOS unit test: How to set/update/examine firstResponder? . But it fails.

- (void)testFocusMovedToYearField {
  UIWindow *window = [[UIWindow alloc] init];
  [window addSubview:self.dateCell.txtDay];
  [window addSubview:self.dateCell.txtYear];   
  [self.dateCell completionBlockHelper];
  [[NSRunLoop currentRunLoop] runUntilDate:[NSDate dateWithTimeIntervalSinceNow:5.0]]; 
  XCTAssertTrue([self.kioskDateCell.txtYear isFirstResponder]);
}

The function completionBlockHelper contains the code to make the txtYear become first responder.

Any suggestions will be helpful.

Answer 1

The window needs to become the key window. In Swift: window.makeKeyAndVisible()