public void Run()
            {
                if (executor.progressMonitor.IsCanceled)
                {
                    outcome = TestOutcome.Canceled;
                    return;
                }

                TestOutcome instanceOutcome;

                try
                {
                    PatternTestInstanceActions decoratedTestInstanceActions = testState.TestActions.TestInstanceActions.Copy();

                    instanceOutcome = primaryContext.Sandbox.Run(TestLog.Writer,
                                                                 new DecorateTestInstanceAction(testState, decoratedTestInstanceActions).Run, "Decorate Child Test");

                    if (instanceOutcome.Status == TestStatus.Passed)
                    {
                        bool invisibleTestInstance = true;

                        PatternTestStep testStep;
                        if (reusePrimaryTestStep)
                        {
                            testStep = testState.PrimaryTestStep;
                            invisibleTestInstance = false;

                            PropertyBag map = DataItemUtils.GetMetadata(bindingItem);
                            foreach (KeyValuePair <string, string> entry in map.Pairs)
                            {
                                primaryContext.AddMetadata(entry.Key, entry.Value);
                            }
                        }
                        else
                        {
                            testStep = new PatternTestStep(testState.Test, testState.PrimaryTestStep,
                                                           testState.Test.Name, testState.Test.CodeElement, false);
                            testStep.Kind = testState.Test.Kind;

                            testStep.IsDynamic = bindingItem.IsDynamic;
                            bindingItem.PopulateMetadata(testStep.Metadata);
                        }

                        var bodyAction        = new RunTestInstanceAction(executor, testCommand);
                        var testInstanceState = new PatternTestInstanceState(testStep, decoratedTestInstanceActions, testState, bindingItem, bodyAction.Run);
                        bodyAction.TestInstanceState = testInstanceState;

                        instanceOutcome = instanceOutcome.CombineWith(primaryContext.Sandbox.Run(
                                                                          TestLog.Writer, new BeforeTestInstanceAction(testInstanceState).Run, "Before Test Instance"));

                        if (instanceOutcome.Status == TestStatus.Passed)
                        {
                            executor.progressMonitor.SetStatus(testStep.Name);

                            TestContext context = reusePrimaryTestStep
                                ? primaryContext
                                : TestContext.PrepareContext(testCommand.StartStep(testStep), primaryContext.Sandbox.CreateChild());
                            testState.SetInContext(context);
                            testInstanceState.SetInContext(context);
                            invisibleTestInstance = false;

                            using (context.Enter())
                            {
                                if (RunTestInstanceBodyAction.CanOptimizeCallChainAndInvokeBodyActionDirectly(testInstanceState))
                                {
                                    bodyAction.SkipProtect = true;
                                    instanceOutcome        = instanceOutcome.CombineWith(bodyAction.Run());
                                }
                                else
                                {
                                    var         runTestInstanceBodyAction = new RunTestInstanceBodyAction(testInstanceState);
                                    TestOutcome sandboxOutcome            = context.Sandbox.Run(TestLog.Writer, runTestInstanceBodyAction.Run, "Body");

                                    instanceOutcome = instanceOutcome.CombineWith(runTestInstanceBodyAction.Outcome.CombineWith(sandboxOutcome));
                                }
                            }

                            if (!reusePrimaryTestStep)
                            {
                                context.FinishStep(instanceOutcome);
                            }

                            executor.progressMonitor.SetStatus("");
                        }

                        instanceOutcome = instanceOutcome.CombineWith(primaryContext.Sandbox.Run(
                                                                          TestLog.Writer, new AfterTestInstanceAction(testInstanceState).Run, "After Test Instance"));

                        if (invisibleTestInstance)
                        {
                            instanceOutcome = PublishOutcomeFromInvisibleTest(testCommand, testStep, instanceOutcome).Outcome;
                        }
                    }
                }
                catch (Exception ex)
                {
                    string message = String.Format("An exception occurred while preparing an instance of test '{0}'.", testState.Test.FullName);

                    if (reusePrimaryTestStep)
                    {
                        TestLog.Failures.WriteException(ex, message);
                        instanceOutcome = TestOutcome.Error;
                    }
                    else
                    {
                        instanceOutcome = ReportTestError(testCommand, testState.PrimaryTestStep, ex, message).Outcome;
                    }
                }

                outcome = instanceOutcome;
            }
            public void Run()
            {
                var test = (PatternTest)testCommand.Test;

                TestContextCookie? parentContextCookie = null;
                try
                {
                    if (parentContext != null)
                        parentContextCookie = parentContext.Enter();

                    // The first time we call Run, we check whether the ApartmentState of the
                    // Thread is correct.  If it is not, then we start a new thread and reenter
                    // with a flag set to skip initial processing.
                    if (!reentered)
                    {
                        if (executor.progressMonitor.IsCanceled)
                        {
                            result = new TestResult(TestOutcome.Canceled);
                            return;
                        }

                        if (!testCommand.AreDependenciesSatisfied())
                        {
                            ITestContext context = testCommand.StartPrimaryChildStep(parentTestStep);
                            context.LogWriter.Warnings.WriteLine("Skipped due to an unsatisfied test dependency.");
                            result = context.FinishStep(TestOutcome.Skipped, null);
                            return;
                        }

                        executor.progressMonitor.SetStatus(test.Name);

                        if (test.ApartmentState != ApartmentState.Unknown
                            && Thread.CurrentThread.GetApartmentState() != test.ApartmentState)
                        {
                            reentered = true;

                            ThreadTask task = new TestEnvironmentAwareThreadTask("Test Runner " + test.ApartmentState,
                                (Action) Run, executor.environmentManager);
                            task.ApartmentState = test.ApartmentState;
                            task.Run(null);

                            if (!task.Result.HasValue)
                            {
                                throw new ModelException(
                                    String.Format("Failed to perform action in thread with overridden apartment state {0}.",
                                        test.ApartmentState), task.Result.Exception);
                            }

                            return;
                        }
                    }

                    // Actually run the test.
                    // Yes, this is a monstrously long method due to the inlining optimzation to minimize stack depth.
                    using (Sandbox sandbox = parentSandbox.CreateChild())
                    {
                        using (new ProcessIsolation())
                        {
                            using (sandbox.StartTimer(test.TimeoutFunc()))
                            {
                                TestOutcome outcome;
                                PatternTestActions testActions = test.TestActions;

                                if (testActionsDecorator != null)
                                    outcome = testActionsDecorator(sandbox, ref testActions);
                                else
                                    outcome = TestOutcome.Passed;

                                if (outcome.Status == TestStatus.Passed)
                                {
                                    PatternTestStep primaryTestStep = new PatternTestStep(test, parentTestStep);
                                    PatternTestState testState = new PatternTestState(primaryTestStep, testActions,
                                        executor.converter, executor.formatter, testCommand.IsExplicit);

                                    bool invisibleTest = true;

                                    outcome = outcome.CombineWith(sandbox.Run(TestLog.Writer,
                                        new BeforeTestAction(testState).Run, "Before Test"));

                                    if (outcome.Status == TestStatus.Passed)
                                    {
                                        bool reusePrimaryTestStep = !testState.BindingContext.HasBindings;
                                        if (!reusePrimaryTestStep)
                                            primaryTestStep.IsTestCase = false;

                                        invisibleTest = false;
                                        TestContext primaryContext = TestContext.PrepareContext(
                                            testCommand.StartStep(primaryTestStep), sandbox);
                                        testState.SetInContext(primaryContext);

                                        using (primaryContext.Enter())
                                        {
                                            primaryContext.LifecyclePhase = LifecyclePhases.Initialize;

                                            outcome = outcome.CombineWith(primaryContext.Sandbox.Run(TestLog.Writer,
                                                new InitializeTestAction(testState).Run, "Initialize"));
                                        }

                                        if (outcome.Status == TestStatus.Passed)
                                        {
                                            var actions = new List<RunTestDataItemAction>();
                                            try
                                            {
                                                foreach (IDataItem bindingItem in testState.BindingContext.GetItems(!executor.options.SkipDynamicTests))
                                                    actions.Add(new RunTestDataItemAction(executor, testCommand, testState, primaryContext,
                                                        reusePrimaryTestStep, bindingItem));

                                                if (actions.Count == 0)
                                                {
                                                    TestLog.Warnings.WriteLine("Test skipped because it is parameterized but no data was provided.");
                                                    outcome = TestOutcome.Skipped;
                                                }
                                                else
                                                {
                                                    if (actions.Count == 1 || ! test.IsParallelizable)
                                                    {
                                                        foreach (var action in actions)
                                                            action.Run();
                                                    }
                                                    else
                                                    {
                                                        executor.scheduler.Run(GenericCollectionUtils.ConvertAllToArray<RunTestDataItemAction, Action>(
                                                            actions, action => action.Run));
                                                    }

                                                    TestOutcome combinedOutcome = TestOutcome.Passed;
                                                    foreach (var action in actions)
                                                        combinedOutcome = combinedOutcome.CombineWith(action.Outcome);

                                                    outcome = outcome.CombineWith(reusePrimaryTestStep ? combinedOutcome : combinedOutcome.Generalize());
                                                }
                                            }
                                            catch (TestException ex)
                                            {
                                                if (ex.Outcome.Status == TestStatus.Failed)
                                                {
                                                    TestLog.Failures.WriteException(ex, String.Format("An exception occurred while getting data items for test '{0}'.", testState.Test.FullName));
                                                }
                                                else
                                                {
                                                    TestLog.Warnings.WriteException(ex);
                                                }

                                                outcome = ex.Outcome;
                                            }
                                            catch (Exception ex)
                                            {
                                                TestLog.Failures.WriteException(ex, String.Format("An exception occurred while getting data items for test '{0}'.", testState.Test.FullName));
                                                outcome = TestOutcome.Error;
                                            }
                                        }

                                        primaryContext.SetInterimOutcome(outcome);

                                        using (primaryContext.Enter())
                                        {
                                            primaryContext.LifecyclePhase = LifecyclePhases.Dispose;

                                            outcome = outcome.CombineWith(primaryContext.Sandbox.Run(TestLog.Writer,
                                                new DisposeTestAction(testState).Run, "Dispose"));
                                        }

                                        result = primaryContext.FinishStep(outcome);
                                    }

                                    outcome = outcome.CombineWith(sandbox.Run(TestLog.Writer,
                                        new AfterTestAction(testState).Run, "After Test"));

                                    if (invisibleTest)
                                        result = PublishOutcomeFromInvisibleTest(testCommand, primaryTestStep, outcome);
                                }
                            }
                        }
                    }
                }
                catch (Exception ex)
                {
                    result = ReportTestError(testCommand, parentTestStep, ex, String.Format("An exception occurred while preparing to run test '{0}'.", test.FullName));
                }
                finally
                {
                    if (parentContextCookie.HasValue)
                        parentContextCookie.Value.ExitContext();

                    executor.progressMonitor.SetStatus("");
                    executor.progressMonitor.Worked(1);
                }
            }
            public void Run()
            {
                var test = (PatternTest)testCommand.Test;

                TestContextCookie?parentContextCookie = null;

                try
                {
                    if (parentContext != null)
                    {
                        parentContextCookie = parentContext.Enter();
                    }

                    // The first time we call Run, we check whether the ApartmentState of the
                    // Thread is correct.  If it is not, then we start a new thread and reenter
                    // with a flag set to skip initial processing.
                    if (!reentered)
                    {
                        if (executor.progressMonitor.IsCanceled)
                        {
                            result = new TestResult(TestOutcome.Canceled);
                            return;
                        }

                        if (!testCommand.AreDependenciesSatisfied())
                        {
                            ITestContext context = testCommand.StartPrimaryChildStep(parentTestStep);
                            context.LogWriter.Warnings.WriteLine("Skipped due to an unsatisfied test dependency.");
                            result = context.FinishStep(TestOutcome.Skipped, null);
                            return;
                        }

                        executor.progressMonitor.SetStatus(test.Name);

                        if (test.ApartmentState != ApartmentState.Unknown &&
                            Thread.CurrentThread.GetApartmentState() != test.ApartmentState)
                        {
                            reentered = true;

                            ThreadTask task = new TestEnvironmentAwareThreadTask("Test Runner " + test.ApartmentState,
                                                                                 (GallioAction)Run, executor.environmentManager);
                            task.ApartmentState = test.ApartmentState;
                            task.Run(null);

                            if (!task.Result.HasValue)
                            {
                                throw new ModelException(
                                          String.Format("Failed to perform action in thread with overridden apartment state {0}.",
                                                        test.ApartmentState), task.Result.Exception);
                            }

                            return;
                        }
                    }

                    // Actually run the test.
                    // Yes, this is a monstrously long method due to the inlining optimzation to minimize stack depth.
                    using (Sandbox sandbox = parentSandbox.CreateChild())
                    {
                        using (new ProcessIsolation())
                        {
                            using (sandbox.StartTimer(test.TimeoutFunc()))
                            {
                                TestOutcome        outcome;
                                PatternTestActions testActions = test.TestActions;

                                if (testActionsDecorator != null)
                                {
                                    outcome = testActionsDecorator(sandbox, ref testActions);
                                }
                                else
                                {
                                    outcome = TestOutcome.Passed;
                                }

                                if (outcome.Status == TestStatus.Passed)
                                {
                                    PatternTestStep  primaryTestStep = new PatternTestStep(test, parentTestStep);
                                    PatternTestState testState       = new PatternTestState(primaryTestStep, testActions,
                                                                                            executor.converter, executor.formatter, testCommand.IsExplicit);

                                    bool invisibleTest = true;

                                    outcome = outcome.CombineWith(sandbox.Run(TestLog.Writer,
                                                                              new BeforeTestAction(testState).Run, "Before Test"));

                                    if (outcome.Status == TestStatus.Passed)
                                    {
                                        bool reusePrimaryTestStep = !testState.BindingContext.HasBindings;
                                        if (!reusePrimaryTestStep)
                                        {
                                            primaryTestStep.IsTestCase = false;
                                        }

                                        invisibleTest = false;
                                        TestContext primaryContext = TestContext.PrepareContext(
                                            testCommand.StartStep(primaryTestStep), sandbox);
                                        testState.SetInContext(primaryContext);

                                        using (primaryContext.Enter())
                                        {
                                            primaryContext.LifecyclePhase = LifecyclePhases.Initialize;

                                            outcome = outcome.CombineWith(primaryContext.Sandbox.Run(TestLog.Writer,
                                                                                                     new InitializeTestAction(testState).Run, "Initialize"));
                                        }

                                        if (outcome.Status == TestStatus.Passed)
                                        {
                                            var actions = new List <RunTestDataItemAction>();
                                            try
                                            {
                                                foreach (IDataItem bindingItem in testState.BindingContext.GetItems(!executor.options.SkipDynamicTests))
                                                {
                                                    actions.Add(new RunTestDataItemAction(executor, testCommand, testState, primaryContext,
                                                                                          reusePrimaryTestStep, bindingItem));
                                                }

                                                if (actions.Count == 0)
                                                {
                                                    TestLog.Warnings.WriteLine("Test skipped because it is parameterized but no data was provided.");
                                                    outcome = TestOutcome.Skipped;
                                                }
                                                else
                                                {
                                                    if (actions.Count == 1 || !test.IsParallelizable)
                                                    {
                                                        foreach (var action in actions)
                                                        {
                                                            action.Run();
                                                        }
                                                    }
                                                    else
                                                    {
                                                        executor.scheduler.Run(GenericCollectionUtils.ConvertAllToArray <RunTestDataItemAction, GallioAction>(
                                                                                   actions, action => action.Run));
                                                    }

                                                    TestOutcome combinedOutcome = TestOutcome.Passed;
                                                    foreach (var action in actions)
                                                    {
                                                        combinedOutcome = combinedOutcome.CombineWith(action.Outcome);
                                                    }

                                                    outcome = outcome.CombineWith(reusePrimaryTestStep ? combinedOutcome : combinedOutcome.Generalize());
                                                }
                                            }
                                            catch (TestException ex)
                                            {
                                                if (ex.Outcome.Status == TestStatus.Failed)
                                                {
                                                    TestLog.Failures.WriteException(ex, String.Format("An exception occurred while getting data items for test '{0}'.", testState.Test.FullName));
                                                }
                                                else
                                                {
                                                    TestLog.Warnings.WriteException(ex);
                                                }

                                                outcome = ex.Outcome;
                                            }
                                            catch (Exception ex)
                                            {
                                                TestLog.Failures.WriteException(ex, String.Format("An exception occurred while getting data items for test '{0}'.", testState.Test.FullName));
                                                outcome = TestOutcome.Error;
                                            }
                                        }

                                        primaryContext.SetInterimOutcome(outcome);

                                        using (primaryContext.Enter())
                                        {
                                            primaryContext.LifecyclePhase = LifecyclePhases.Dispose;

                                            outcome = outcome.CombineWith(primaryContext.Sandbox.Run(TestLog.Writer,
                                                                                                     new DisposeTestAction(testState).Run, "Dispose"));
                                        }

                                        result = primaryContext.FinishStep(outcome);
                                    }

                                    outcome = outcome.CombineWith(sandbox.Run(TestLog.Writer,
                                                                              new AfterTestAction(testState).Run, "After Test"));

                                    if (invisibleTest)
                                    {
                                        result = PublishOutcomeFromInvisibleTest(testCommand, primaryTestStep, outcome);
                                    }
                                }
                            }
                        }
                    }
                }
                catch (Exception ex)
                {
                    result = ReportTestError(testCommand, parentTestStep, ex, String.Format("An exception occurred while preparing to run test '{0}'.", test.FullName));
                }
                finally
                {
                    if (parentContextCookie.HasValue)
                    {
                        parentContextCookie.Value.ExitContext();
                    }

                    executor.progressMonitor.SetStatus("");
                    executor.progressMonitor.Worked(1);
                }
            }