public bool OnMessage()

in src/Microsoft.VisualStudio.Extensibility.Testing.Xunit.Shared/Harness/IdeTestAssemblyRunner.cs [381:433]
47 lines of code
9 McCabe index (conditional complexity)

            public bool OnMessage(IMessageSinkMessage message)
            {
                if (message is ITestAssemblyFinished testAssemblyFinished)
                {
                    // The test cases in the ITestAssemblyFinished message are remote proxies, but the objects won't be
                    // used until after the remote process terminates. Recreate the objects in the current process (or
                    // map them to an equivalent object already in the current process) to avoid using objects that are
                    // no longer available.
                    var testCases = testAssemblyFinished.TestCases.Select(testCase =>
                    {
                        if (_knownTestCasesByUniqueId.TryGetValue(testCase.UniqueID, out var knownTestCase))
                        {
                            return knownTestCase;
                        }
                        else if (testCase is IdeTestCase ideTestCase)
                        {
                            return new IdeTestCase(this, ideTestCase.DefaultMethodDisplay, ideTestCase.DefaultMethodDisplayOptions, ideTestCase.TestMethod, ideTestCase.VisualStudioInstanceKey, ideTestCase.TestMethodArguments);
                        }
                        else if (testCase is IdeTheoryTestCase ideTheoryTestCase)
                        {
                            return new IdeTheoryTestCase(this, ideTheoryTestCase.DefaultMethodDisplay, ideTheoryTestCase.DefaultMethodDisplayOptions, ideTheoryTestCase.TestMethod, ideTheoryTestCase.VisualStudioInstanceKey, ideTheoryTestCase.TestMethodArguments);
                        }
                        else if (testCase is IdeInstanceTestCase ideInstanceTestCase)
                        {
                            return new IdeInstanceTestCase(this, ideInstanceTestCase.DefaultMethodDisplay, ideInstanceTestCase.DefaultMethodDisplayOptions, ideInstanceTestCase.TestMethod, ideInstanceTestCase.VisualStudioInstanceKey, ideInstanceTestCase.TestMethodArguments);
                        }
                        else
                        {
                            return new XunitTestCase(this, TestMethodDisplay.ClassAndMethod, TestMethodDisplayOptions.None, testCase.TestMethod, testCase.TestMethodArguments);
                        }
                    });

                    TestAssemblyFinished = new TestAssemblyFinished(testCases.ToArray(), testAssemblyFinished.TestAssembly, testAssemblyFinished.ExecutionTime, testAssemblyFinished.TestsRun, testAssemblyFinished.TestsFailed, testAssemblyFinished.TestsSkipped);
                    return !_cancellationToken.IsCancellationRequested;
                }
                else if (message is ITestCaseStarting testCaseStarting)
                {
                    CurrentTestCase = DataCollectionService.GetTestName(testCaseStarting.TestCase);
                    return _messageSink.OnMessage(message);
                }
                else if (message is ITestCaseFinished testCaseFinished)
                {
                    CurrentTestCase = null;
                    _completedTestCaseIds.Add(testCaseFinished.TestCase.UniqueID);
                    return !_cancellationToken.IsCancellationRequested;
                }
                else if (message is ITestAssemblyStarting)
                {
                    return !_cancellationToken.IsCancellationRequested;
                }

                return _messageSink.OnMessage(message);
            }