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

        public static void Ctor_String_Int_Int_Int(string value, int startIndex, int length)
        {
            var builder = new StringBuilder(value, startIndex, length, 42);

            string expected = value?.Substring(startIndex, length) ?? "";
            Assert.Equal(expected, builder.ToString());
            Assert.Equal(length, builder.Length);
            Assert.Equal(expected.Length, builder.Length);

            Assert.True(builder.Capacity >= 42);
        }