@Test
public void testIsRotation_Left() {
String s1 = "abcd";
String s2 = "bcda";
assertTrue(Question_1_9.isRotation(s1, s2));
}
@Test
public void testIsRotation_Null() {
String s1 = "abc";
String s2 = null;
assertFalse(Question_1_9.isRotation(s1, s2));
}
@Test
public void testIsRotation_Empty() {
String s1 = "";
String s2 = "bcd";
assertFalse(Question_1_9.isRotation(s1, s2));
}
@Test
public void testIsRotation_DifferentLength() {
String s1 = "abcd";
String s2 = "bcd";
assertFalse(Question_1_9.isRotation(s1, s2));
}
@Test
public void testIsRotation_False() {
String s1 = "abcd";
String s2 = "acbd";
assertFalse(Question_1_9.isRotation(s1, s2));
}
@Test
public void testIsRotation_Right() {
String s1 = "abcd";
String s2 = "dabc";
assertTrue(Question_1_9.isRotation(s1, s2));
}
