Force IOException in Linux while reading a file

[eduherminio]

The following test needs to be skipped since it fails in Travis CI env (no exception is thrown).

        [Fact(Skip ="No exception is thrown in Linux (CI env)")]
        void IOException()
        {
            string fileName = "Any.txt";
            StreamWriter writer = new StreamWriter(fileName);
            using (writer)
            {
                Assert.Throws<IOException>(() => FileReader.Parse(fileName));
            }
        }

If no way of forcing IOException in Linux is found, test would better be deleted.