I have below test which is returning false. Am I missing something?
TextUtils.isEmpty("")
Update: For some reason I am not able to answer to my question or add comment. I am running JUNit test case and not the instrumentation test case. As, suggested I found out that the above method returns incorrect value when we don't run as an Instrumentation. Thanks every one for help. I have upvoted the answer and correct comment.
It should return true for empty string. From the source of TextUtils:
public static boolean isEmpty(@Nullable CharSequence str) {
if (str == null || str.length() == 0)
return true;
else
return false;
}
In tests try using something like:
mockStatic(TextUtils.class);
when(TextUtils.isEmpty(any(CharSequence.class))).thenAnswer(new Answer<Boolean>() {
@Override
public Boolean answer(InvocationOnMock invocation) throws Throwable {
Object[] args = invocation.getArguments();
String string = (String) args[0];
return (string == null || string.length() == 0);
}
});
false because the method is mocked.
If you are using Kotlin use isNullOrBlank() or isNullOrEmpty() methods instead. You don't need any mocking for tests.
