public void AvaliableThemes()
{
// Arrange
var mockParentDir = new Mock <VirtualDirectory>("parent");
mockParentDir.SetupGet(v => v.Name).Returns("parent");
var mockDir = new Mock <VirtualDirectory>("bar");
mockDir.SetupGet(v => v.Name).Returns("bar");
mockParentDir.SetupGet(v => v.Directories).Returns(new[] { mockDir.Object });
var vpp = new Mock <VirtualPathProvider>();
vpp.Setup(v => v.GetDirectory("parent")).Returns(mockParentDir.Object);
// Act
var actual = Themes.GetAvailableThemes(vpp.Object, "parent");
// Assert
Assert.AreEqual(1, actual.Count);
Assert.AreEqual("bar", actual[0]);
}