### Question:
TranscribeUtils { public static String getFirstWords(String text, int numberOfWords) { if (text != null) { String[] words = StringUtils.split(text, " "); return words.length > numberOfWords ? StringUtils.join(words, " ", 0, numberOfWords) + " ..." : StringUtils.join(words, " ", 0, words.length); } return ""; }  static String getFirstWords(String text, int numberOfWords); static String extractMediaType(String mimeType); static Predicate<T> distinctByProperty(Function<? super T, ?> propertyExtractor); static List<TranscribeItem> clone(List<TranscribeItem> items); static String getText(List<TranscribeItem> items);  }### Answer:
@Test public void getFirstWords_MoreThanRequired() { String sentence = "This is just some testing sentence with some words in it."; String expectedResult = "This is just some testing ..."; String actualResult = TranscribeUtils.getFirstWords(sentence, 5); assertEquals(expectedResult, actualResult); }
@Test public void getFirstWords2_EqualThanRequired() { String sentence = "This is just some testing."; String expectedResult = "This is just some testing."; String actualResult = TranscribeUtils.getFirstWords(sentence, 5); assertEquals(expectedResult, actualResult); }
@Test public void getFirstWords3_LessThanRequired() { String sentence = "This is shorter."; String expectedResult = "This is shorter."; String actualResult = TranscribeUtils.getFirstWords(sentence, 5); assertEquals(expectedResult, actualResult); }
@Test public void getFirstWords4_EmptyString() { String sentence = ""; String expectedResult = ""; String actualResult = TranscribeUtils.getFirstWords(sentence, 5); assertEquals(expectedResult, actualResult); }
@Test public void getFirstWords5_Null() { String sentence = null; String expectedResult = ""; String actualResult = TranscribeUtils.getFirstWords(sentence, 5); assertEquals(expectedResult, actualResult); }