public void GiveResultTest()
{
StringStream stringStream = new StringStream();
char[] array = new char[5] {
'\0', 'a', '\0', 'i', '\0'
};
stringStream.countVowel = new int[5] {
0, 3, 1, 0, 2
};
var result = stringStream.GiveResult(array);
Assert.AreEqual('i', result);
}