public void Test1()
{
//initial examples
var result = _functions.FindCommonCharacters("abcde", "axcye");
Assert.AreEqual("ace", result);
result = _functions.FindCommonCharacters("fghij", "fguij");
Assert.AreEqual("fgij", result);
// all differ, all different chars
result = _functions.FindCommonCharacters("abcde", "fghij");
Assert.AreEqual("", result);
// all differ, same chars, different order
result = _functions.FindCommonCharacters("abcde", "bcdea");
Assert.AreEqual("", result);
// 1 character differs
result = _functions.FindCommonCharacters("abcde", "fbcde");
Assert.AreEqual("bcde", result);
result = _functions.FindCommonCharacters("abcde", "afcde");
Assert.AreEqual("acde", result);
result = _functions.FindCommonCharacters("abcde", "abfde");
Assert.AreEqual("abde", result);
result = _functions.FindCommonCharacters("abcde", "abcfe");
Assert.AreEqual("abce", result);
result = _functions.FindCommonCharacters("abcde", "abcdf");
Assert.AreEqual("abcd", result);
// 2 characters differ
result = _functions.FindCommonCharacters("abcde", "ffcde");
Assert.AreEqual("cde", result);
result = _functions.FindCommonCharacters("abcde", "affde");
Assert.AreEqual("ade", result);
result = _functions.FindCommonCharacters("abcde", "abffe");
Assert.AreEqual("abe", result);
result = _functions.FindCommonCharacters("abcde", "abcff");
Assert.AreEqual("abc", result);
// 3 characters differ
result = _functions.FindCommonCharacters("abcde", "fffde");
Assert.AreEqual("de", result);
result = _functions.FindCommonCharacters("abcde", "afffe");
Assert.AreEqual("ae", result);
result = _functions.FindCommonCharacters("abcde", "abfff");
Assert.AreEqual("ab", result);
// 4 characters differ
result = _functions.FindCommonCharacters("abcde", "ffffe");
Assert.AreEqual("e", result);
result = _functions.FindCommonCharacters("abcde", "affff");
Assert.AreEqual("a", result);
}
