public void WritesCorrectly()
{
var io = new StringIO("");
io.Write("test");
io.Write(" {0} {1}", 123, 456);
Assert.AreEqual("test 123 456", io.output);
}
public void WritesLinesCorrectly()
{
var io = new StringIO("");
io.WriteLine("aaa");
io.Write("bbb");
io.WriteLine(" {0} {1}", 123, 456);
Assert.AreEqual("aaa\nbbb 123 456\n", io.output);
}