System.Tests.StringTests.Substring C# (CSharp) 메소드

        public static void Substring(string s, int startIndex, int length, string expected)
        {
            if (startIndex + length == s.Length)
            {
                Assert.Equal(expected, s.Substring(startIndex));
            }
            Assert.Equal(expected, s.Substring(startIndex, length));
        }