public void MemoryFileSystemProvider_GetFiles_ReturnsCollectionOfFiles()
{
var provider = new MemoryFileSystemProvider();
Assert.False(provider.GetFiles("/").Any());
provider.CreateFile("input.dat");
Assert.Single(provider.GetFiles("/"));
Assert.Equal("/input.dat", provider.GetFiles("/").First());
provider.CreateFolder("home");
provider.CreateFile("/home/input1.dat");
provider.CreateFile("/home/input2.dat");
Assert.Equal(2, provider.GetFiles("/home").Count());
Assert.Equal("/home/input1.dat", provider.GetFiles("/home").First());
Assert.Equal("/home/input2.dat", provider.GetFiles("/home").Last());
}
