System.Text.Tests.StringBuilderTests.Insert_String_Count_Invalid C# (CSharp) Method

        public static void Insert_String_Count_Invalid()
        {
            var builder = new StringBuilder(0, 6);
            builder.Append("Hello");

            Assert.Throws<ArgumentOutOfRangeException>("index", () => builder.Insert(-1, "")); // Index < 0
            Assert.Throws<ArgumentOutOfRangeException>("index", () => builder.Insert(-1, "", 0)); // Index < 0

            Assert.Throws<ArgumentOutOfRangeException>("index", () => builder.Insert(builder.Length + 1, "")); // Index > builder.Length
            Assert.Throws<ArgumentOutOfRangeException>("index", () => builder.Insert(builder.Length + 1, "", 0)); // Index > builder.Length

            Assert.Throws<ArgumentOutOfRangeException>("count", () => builder.Insert(0, "", -1)); // Count < 0

            Assert.Throws<ArgumentOutOfRangeException>("requiredLength", () => builder.Insert(builder.Length, "aa")); // New length > builder.MaxCapacity
            Assert.Throws<OutOfMemoryException>(() => builder.Insert(builder.Length, "aa", 1)); // New length > builder.MaxCapacity
            Assert.Throws<OutOfMemoryException>(() => builder.Insert(builder.Length, "a", 2)); // New length > builder.MaxCapacity
        }