String test1 = "test";
String test2 = "testing";
int result = StringHelper.stringDifference(test1, test2);
assertTrue(result == 4);
test2 = "foo";
result = StringHelper.stringDifference(test1, test2);
assertTrue(result == 0);
test2 = "test";
result = StringHelper.stringDifference(test1, test2);
assertTrue(result == 4);