@Test
public void testJoin() {

    assertThat( Strings.join( new ArrayList<String>(), "-" ) ).isEqualTo( "" );
    assertThat( Strings.join( Arrays.asList( "Hello", "World" ), "-" ) ).isEqualTo( "Hello-World" );
    assertThat( Strings.join( Arrays.asList( "Hello" ), "-" ) ).isEqualTo( "Hello" );
}