@Test
void testReplaceAll() {

	Charray ch2 = a.clone();
	ch2.replaceAll('a', 'b');
	assertEquals("b", ch2.toString());
	assertEquals("a", a.toString());
	Charray aaaba = new Charray("aaaba");
	aaaba.replaceAll('a', 'z');
	assertEquals("zzzbz", aaaba.toString());
}