@Test // empty parameter value == included in output as empty
public void addQueryParameters_emptyparamvalue() {

	assertEquals("http://test.com/a?b=", StringUtils.addQueryParameters("http://test.com/a", "b", ""));
	assertEquals("http://test.com/a?b=&c=2", StringUtils.addQueryParameters("http://test.com/a", "b", "", "c", "2"));
}