public void ChangelogTaskTest() { // update dummy assemblyInfo File.Delete(dummyAssemblyInfo); using (var writer = new StreamWriter(dummyAssemblyInfo)) { writer.WriteLine("[assembly: AssemblyVersion(\"2.0.0.0\")]"); writer.Close(); } Changelog task = new Changelog { AssemblyInfoPath = dummyAssemblyInfo, BuildEngine = new DummyBuildEngine() }; bool result = task.Execute(); Assert.IsTrue(result); }