public void AddFilesAddFilesToProjectSystem()
{
// Arrange
var fileSystem = new MockProjectSystem();
var files = PackageUtility.CreateFiles(new[] { "A", "B", "C" });
// Act
fileSystem.AddFiles(files, String.Empty);
// Assert
Assert.True(fileSystem.FileExists("A"));
Assert.True(fileSystem.FileExists("B"));
Assert.True(fileSystem.FileExists("C"));
}