private async Task DoStartAsync()

in e2etest/GuestProxyAgentTest/TestScenarios/TestScenarioBase.cs [144:203]
52 lines of code
8 McCabe index (conditional complexity)

        private async Task DoStartAsync(TestScenarioStatusDetails testScenarioStatusDetails, CancellationToken cancellationToken)
        {
            try
            {
                ConsoleLog("Running test.");
                testScenarioStatusDetails.Status = ScenarioTestStatus.Running;

                VirtualMachineResource vmr;
                Stopwatch sw = Stopwatch.StartNew();
                var vmCreateTestName = "CreateVM";
                try
                {
                    vmr = await _vmBuilder.Build(this.EnableProxyAgentForNewVM, cancellationToken);
                    ConsoleLog("VM Create succeed");
                    sw.Stop();
                    _junitTestResultBuilder.AddSuccessTestResult(_testScenarioSetting.testScenarioName, vmCreateTestName, "VM Create succeed", "", sw.ElapsedMilliseconds);
                }
                catch (Exception ex)
                {
                    // if the VM Creation operation failed, try check the VM instance view for 5 minutes
                    var startTime = DateTime.UtcNow;
                    while (true)
                    {
                        vmr = await _vmBuilder.GetVirtualMachineResource();
                        var instanceView = await vmr.InstanceViewAsync(cancellationToken: cancellationToken);
                        if (instanceView?.Value?.Statuses?.Count > 0 && (instanceView.Value.Statuses[0].DisplayStatus == "Provisioning succeeded"
                            || instanceView.Value.Statuses[0].DisplayStatus == "VM running"))
                        {
                            ConsoleLog("VM Create succeed");
                            sw.Stop();
                            _junitTestResultBuilder.AddSuccessTestResult(_testScenarioSetting.testScenarioName, vmCreateTestName, "VM Create succeed", "", sw.ElapsedMilliseconds);
                            break;
                        }

                        if (DateTime.UtcNow - startTime > TimeSpan.FromMinutes(5))
                        {
                            // poll timed out, rethrow the exception
                            sw.Stop();
                            _junitTestResultBuilder.AddFailureTestResult(testScenarioStatusDetails.ScenarioName, vmCreateTestName, "", ex.Message + ex.StackTrace ?? "", "", sw.ElapsedMilliseconds);
                            throw;
                        }

                        // wait for 10 seconds before polling again
                        await Task.Delay(10000);
                    }
                }

                ConsoleLog("Running scenario test: " + _testScenarioSetting.testScenarioName);
                await ScenarioTestAsync(vmr, testScenarioStatusDetails, cancellationToken);
            }
            catch (Exception ex)
            {
                testScenarioStatusDetails.ErrorMessage = ex.Message;
                testScenarioStatusDetails.Result = ScenarioTestResult.Failed;
                ConsoleLog("Exception occurs: " + ex.Message);
            }

            testScenarioStatusDetails.Status = ScenarioTestStatus.Completed;
            ConsoleLog("Test scenario run finished.");
        }