public void Should_Not_Install_Addins_Present_On_Disk() { // Given var fixture = new ScriptProcessorFixture(); fixture.GivenAddinFilesAlreadyHaveBeenDownloaded(); // When fixture.InstallAddins(); // Then fixture.Installer.Received(0) .InstallPackage(Arg.Any <NuGetPackage>(), Arg.Any <DirectoryPath>()); }