public void TestSelectOrRemoveDirectoryForMultipleSelection()
{
string myDocuments = Environment.GetFolderPath(Environment.SpecialFolder.MyDocuments);
string myPictures = Environment.GetFolderPath(Environment.SpecialFolder.MyPictures);
string myMusic = Environment.GetFolderPath(Environment.SpecialFolder.MyMusic);
FileSystemController fileSystemController = new FileSystemController();
Assert.False(fileSystemController.SelectedDirectories.Any());
fileSystemController.SelectOrRemoveDirectoryForMultipleSelection(myDocuments);
fileSystemController.SelectOrRemoveDirectoryForMultipleSelection(myPictures);
fileSystemController.SelectOrRemoveDirectoryForMultipleSelection(myMusic);
Assert.Contains(fileSystemController.SelectedDirectories, directory => directory.FullName == myDocuments);
Assert.Contains(fileSystemController.SelectedDirectories, directory => directory.FullName == myPictures);
Assert.Contains(fileSystemController.SelectedDirectories, directory => directory.FullName == myMusic);
fileSystemController.SelectOrRemoveDirectoryForMultipleSelection(myMusic);
Assert.Contains(fileSystemController.SelectedDirectories, directory => directory.FullName == myDocuments);
Assert.Contains(fileSystemController.SelectedDirectories, directory => directory.FullName == myPictures);
Assert.DoesNotContain(fileSystemController.SelectedDirectories, directory => directory.FullName == myMusic);
}