public void TestTextReader()
{
Assert.AreEqual(TextRender.ChangeVowelCase("abceE"), "AbcEe");
Assert.AreEqual(TextRender.ChangeVowelCase("sdf"), "sdf");
Assert.AreEqual(TextRender.ChangeVowelCase("ыва"), "џвј");
Assert.AreEqual(TextRender.ChangeVowelCase("цц"), "цц");
Assert.AreEqual(TextRender.ChangeVowelCase(""), "");
}
