Adding in new test for parallel raise events in workflow (#1155) (#1157)

* Adding in new test for parallel raise events in workflow

Signed-off-by: Ryan Lettieri <ryanLettieri@microsoft.com>
Signed-off-by: Hal Spang <halspang@microsoft.com>
Co-authored-by: Ryan Lettieri <67934986+RyanLettieri@users.noreply.github.com>

Author: halspang

test/Dapr.E2E.Test.App/Startup.cs

@@ -70,6 +70,11 @@ public void ConfigureServices(IServiceCollection services)
 
                     var itemToPurchase = input;
 
+                    // There are 5 of the same event to test that multiple similarly-named events can be raised in parallel
+                    await context.WaitForExternalEventAsync<string>("ChangePurchaseItem");
+                    await context.WaitForExternalEventAsync<string>("ChangePurchaseItem");
+                    await context.WaitForExternalEventAsync<string>("ChangePurchaseItem");
+                    await context.WaitForExternalEventAsync<string>("ChangePurchaseItem");
                     itemToPurchase = await context.WaitForExternalEventAsync<string>("ChangePurchaseItem");
 
                     // In real life there are other steps related to placing an order, like reserving

test/Dapr.E2E.Test/Workflows/WorkflowTest.cs

@@ -93,8 +93,16 @@ public async Task TestWorkflows()
                 input: input,
                 workflowOptions: workflowOptions);
 
-            // RAISE EVENT TEST
-            await daprClient.RaiseWorkflowEventAsync(instanceId2, workflowComponent, "ChangePurchaseItem", "computers");
+            // PARALLEL RAISE EVENT TEST
+            var event1 = daprClient.RaiseWorkflowEventAsync(instanceId2, workflowComponent, "ChangePurchaseItem", "computers");
+            var event2 = daprClient.RaiseWorkflowEventAsync(instanceId2, workflowComponent, "ChangePurchaseItem", "computers");
+            var event3 = daprClient.RaiseWorkflowEventAsync(instanceId2, workflowComponent, "ChangePurchaseItem", "computers");
+            var event4 = daprClient.RaiseWorkflowEventAsync(instanceId2, workflowComponent, "ChangePurchaseItem", "computers");
+            var event5 = daprClient.RaiseWorkflowEventAsync(instanceId2, workflowComponent, "ChangePurchaseItem", "computers");
+
+            var externalEvents = Task.WhenAll(event1, event2, event3, event4, event5);
+            var winner = await Task.WhenAny(externalEvents, Task.Delay(TimeSpan.FromSeconds(30)));
+            externalEvents.IsCompletedSuccessfully.Should().BeTrue($"Unsuccessful at raising events. Status of events: {externalEvents.IsCompletedSuccessfully}");
 
             // Wait up to 30 seconds for the workflow to complete and check the output
             using var cts = new CancellationTokenSource(delay: TimeSpan.FromSeconds(30));