UITests-How to get current language in UITests - ios

Question

XCUIApplication *app = [[XCUIApplication alloc] init];
[app.buttons[#"login"] tap];
See as above, in tests.m file, I want get login button by string "login", But, my app support multi-languages. How to get current language of my app.
The method below is the method how I get current Language. User set language in setting view of my app. I store current Language in NSUserDefaults.
+ (NSString*)currentLanguage
{
NSUserDefaults *lanUser = [NSUserDefaults standardUserDefaults];
NSString *currentLanguage = [lanUser valueForKey:kCNOGASingularLanguage];
if([currentLanguage length]==0)
currentLanguage = kApplicationLanguageEnglish;
return currentLanguage;
}

Answer 1

Storing the user's language in your app's UserDefaults and then accessing that from your UITest won't work. Your app and the UITest are running as separate processes, which means that your UITest cannot access your app's UserDefaults
There is a simple solution: To become independent from the users language you can set the accessibilityIdentifier on your UIButton and then access the button via the accessibilityIdentifier:
In your app:
button.accessibilityIdentifier = #"login";
In your UITest:
[app.buttons[#"login"] tap];
The accessibilityIdentifier is never displayed and VoiceOver also does not read it, so it does not have to be localized. Just make sure you are using accessibilityIdentifier and not accessibilityLabel. Because accessibilityLabel will be read by VoiceOver for handicapped users and should be localized.
ALTERNATIVE
If you cannot use accessibilityIdentifier to query your UI elements you could use your app's LocalizableStrings file in your UITests to get the localized button title (in this case):
First add your Localizable.strings file to your UITest target, then access the file via the UITest bundle to get the localized strings (I use a little helper method for that):
func localized(_ key: String) -> String {
let uiTestBundle = Bundle(for: AClassFromYourUITests.self)
return NSLocalizedString(key, bundle: uiTestBundle, comment: "")
}
I wrote a little blog post about this a while back with some more details.