public void TexstyleReturnValidHtml()
        {
            //Arrange
            string expectedExceptionMessage = "<h1>Voodoo</h1>\r\n";
            var    converterUnderTest       = new TextileConverter();

            //Act
            string result = converterUnderTest.ScriptToHtml("h1. Voodoo");

            //Assert
            Assert.AreEqual(expectedExceptionMessage, result);
        }
        public void ThrowArgumentNullExceptionWhenContextIsNull()
        {
            //Arrange
            string expectedExceptionMessage = "script";
            var    converterUnderTest       = new TextileConverter();

            //Act & Assert
            var exc = Assert.Throws <ArgumentNullException>(() => converterUnderTest.ScriptToHtml(null));

            //Assert
            StringAssert.Contains(expectedExceptionMessage, exc.Message);
        }