System.Data.Tests.DataTableReaderTest.GetCharsTest C# (CSharp) Метод

        public void GetCharsTest()
        {
            _dt.Columns.Add("col2", typeof(char[]));

            _dt.Rows.Clear();
            _dt.Rows.Add(new object[] { 1, "string", "string".ToCharArray() });
            _dt.Rows.Add(new object[] { 2, "string1", null });
            DataTableReader rdr = _dt.CreateDataReader();

            rdr.Read();

            try
            {
                rdr.GetChars(1, 0, null, 0, 10);
                Assert.False(true);
            }
            catch (InvalidCastException e)
            {
                // Never premise English.
                //Assert.Equal ("Unable to cast object of type 'System.String'" +
                //	" to type 'System.Char[]'.", e.Message, "#1");
            }
            char[] char_arr = null;
            long len = 0;

            len = rdr.GetChars(2, 0, null, 0, 0);
            Assert.Equal(6, len);

            char_arr = new char[len];
            len = rdr.GetChars(2, 0, char_arr, 0, 0);
            Assert.Equal(0, len);

            len = rdr.GetChars(2, 0, null, 0, 0);
            char_arr = new char[len + 2];
            len = rdr.GetChars(2, 0, char_arr, 2, 100);
            Assert.Equal(6, len);
            char[] val = (char[])rdr.GetValue(2);
            for (int i = 0; i < len; ++i)
                Assert.Equal(val[i], char_arr[i + 2]);
        }