1 WrapperTest.java

  public static class DegenerateTests {
    @Test
    public void wrap_EmptyString_ShouldBeEmpty() throws Exception {
      assertThat(wrap("", 1), equalTo(""));
    }

    @Test
    public void stringShorterThanColDoesNotWrap() throws Exception {
      assertThat(wrap("word", 10), equalTo("word"));
    }
  }

2 Wrapper.java

public class Wrapper {
  public static String wrap(String s, int col) {
      return s;
  }
}