@Test
public void testRemoveDuplicateChars2() {
String str;
str = testClass.removeDuplicateChars2("Duplicatecharcheck");
assertTrue("Unique chars check", testClass.findDuplicatesChars2(str));
str = testClass.removeDuplicateChars2("abcd");
assertTrue("Unique chars check", testClass.findDuplicatesChars2(str));
str = testClass.removeDuplicateChars2("aaaa");
assertTrue("Unique chars check", testClass.findDuplicatesChars2(str));
str = testClass.removeDuplicateChars2("aaaabbb");
assertTrue("Unique chars check", testClass.findDuplicatesChars2(str));
}
@Test
public void testFindDuplicatesChars2() {
assertTrue("Unique chars check", testClass.findDuplicatesChars2("length"));
assertFalse("Duplicate char check", testClass.findDuplicatesChars2("seen"));
}