	@Test
	public void testTrimPreffix() {

		assertEquals("toto", Utils.trimPreffix("toto", "titi"));
		assertEquals("toto", Utils.trimPreffix("tititoto", "titi"));
		assertEquals("tototiti", Utils.trimPreffix("tototiti", "titi"));
		assertEquals("toto", Utils.trimPreffix("toto", ""));
		assertEquals("", Utils.trimPreffix("titi", "titi"));
		assertEquals("", Utils.trimPreffix("", "titi"));
	}