@Test
public void testTrimTrailingWhitespace() throws Exception {
assertEquals(null, StringUtils.trimTrailingWhitespace(null));
assertEquals("", StringUtils.trimTrailingWhitespace(""));
assertEquals("", StringUtils.trimTrailingWhitespace(" "));
assertEquals("", StringUtils.trimTrailingWhitespace("\t"));
assertEquals("a", StringUtils.trimTrailingWhitespace("a "));
assertEquals(" a", StringUtils.trimTrailingWhitespace(" a"));
assertEquals(" a", StringUtils.trimTrailingWhitespace(" a "));
assertEquals(" a b", StringUtils.trimTrailingWhitespace(" a b "));
assertEquals(" a b c", StringUtils.trimTrailingWhitespace(" a b c "));
}
