public void to_decimal() { Assert.Throws <ArgumentNullException>(() => ConvertExtensions.Decimal(null, new object())); Assert.Null(Convert.To.Decimal(null)); Assert.Equal(decimal.MinValue, Convert.To.Decimal(decimal.MinValue)); Assert.Equal(decimal.MinValue, Convert.To.Decimal(decimal.MinValue.ToString(CultureInfo.InvariantCulture))); Assert.Null(Convert.To.Decimal(new object())); }