public void FileSystemQuery_GetFilesListing_NoSeperator_ExpectNoResults()
{
var dir = new Mock<IDirectory>();
dir.Setup(a => a.GetFileSystemEntries(It.IsAny<string>(), It.IsAny<string>())).Returns(new[] { "a", "b", "c" });
var files = FileSystemQuery.GetFilesListing("bob", 'c', dir.Object);
Assert.AreEqual(files.Count, 0);
}