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androidunit-testingjunittextutils

TextUtils.join returns NULL on Unit Test

I'm joining a list of strings by using TextUtils.join but it's returning NULL. I'm doing this on a simple unit test.

Here's the code in question:

@Test
public void testJoinText(){
    List<String> letters = Lists.newArrayList();
    letters.add("A");
    letters.add("B");
    letters.add("C");
    letters.add("D");
    letters.add("E");

    String joinedLetters = TextUtils.join(";", letters); //This is returning null.
}

Am I doing something wrong?

Solution

  • TextUtils class is in android.util.*. So you cannot use TextUtils' functions in test package. You should test this code in androidTest package.