@Test
public void testSplitMixedCaseWord_happyPath_oneWordWithAllCaps() {

    List<String> actual = SpellChecker.splitMixedCaseWord("HTMLValidator");
    Assert.assertEquals("Unexpected split word count, actual = " + String.join(", ", actual), 2, actual.size());
    Assert.assertEquals("HTML", actual.get(0));
    Assert.assertEquals("Validator", actual.get(1));
}