public void GetFiles()
{
Assert.AreEqual(new string[0], _sut.GetFiles(_testRoot, "*"));
File.Create(Path.Combine(_testRoot, "a")).Close();
File.Create(Path.Combine(_testRoot, "b")).Close();
Directory.CreateDirectory(Path.Combine(_testRoot, "C"));
var actuals = _sut.GetFiles(_testRoot, "*");
var expecteds = new[] { Path.Combine(_testRoot, "a"), Path.Combine(_testRoot, "b") };
Assert.AreEqual(expecteds, actuals);
}