Make certain tests sequential to prevent conflicts (#3071)

Author: andystaples

test/e2e/Tests/Constants.cs

@@ -12,4 +12,5 @@ internal class Constants
     internal static readonly string FunctionsHostUrl = Configuration["FunctionAppUrl"] ?? "http://localhost:7071";
 
     internal const string FunctionAppCollectionName = "DurableTestsCollection";
+    internal const string FunctionAppCollectionSequentialName = "DurableTestsCollectionSequential";
 }

test/e2e/Tests/Fixtures/FunctionAppFixture.cs

@@ -164,3 +164,12 @@ public class FunctionAppCollection : ICollectionFixture<FunctionAppFixture>
     // to be the place to apply [CollectionDefinition] and all the
     // ICollectionFixture<> interfaces.
 }
+
+
+[CollectionDefinition(Constants.FunctionAppCollectionSequentialName, DisableParallelization = true)]
+public class FunctionAppCollectionSequential : ICollectionFixture<FunctionAppFixture>
+{
+    // This class has no code, and is never created. Its purpose is simply
+    // to be the place to apply [CollectionDefinition] and all the
+    // ICollectionFixture<> interfaces.
+}

test/e2e/Tests/Tests/OrchestrationQueryTests.cs

@@ -8,7 +8,7 @@
 
 namespace Microsoft.Azure.Durable.Tests.DotnetIsolatedE2E;
 
-[Collection(Constants.FunctionAppCollectionName)]
+[Collection(Constants.FunctionAppCollectionSequentialName)]
 public class OrchestrationQueryTests
 {
     private readonly FunctionAppFixture _fixture;

test/e2e/Tests/Tests/PurgeInstancesTests.cs

@@ -1,16 +1,10 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Net;
-using System.Text;
-using System.Text.RegularExpressions;
-using System.Threading.Tasks;
+using System.Net;
 using Xunit;
 using Xunit.Abstractions;
 
 namespace Microsoft.Azure.Durable.Tests.DotnetIsolatedE2E;
 
-[Collection(Constants.FunctionAppCollectionName)]
+[Collection(Constants.FunctionAppCollectionSequentialName)]
 public class PurgeInstancesTests
 {
     private readonly FunctionAppFixture _fixture;
@@ -95,6 +89,12 @@ public async Task PurgeOrchestrationHistoryAfterInvocation_Succeeds()
     [Trait("DTS", "Skip")] // Skip this test as there is a bug with current DTS backend, the createdTimeTo couldn't be null. 
     public async Task PurgeAfterPurge_ZeroRows()
     {
+        using HttpResponseMessage response = await HttpHelpers.InvokeHttpTrigger("HelloCities_HttpStart", "");
+        Assert.Equal(HttpStatusCode.Accepted, response.StatusCode);
+        string statusQueryGetUri = await DurableHelpers.ParseStatusQueryGetUriAsync(response);
+
+        await DurableHelpers.WaitForOrchestrationStateAsync(statusQueryGetUri, "Completed", 30);
+
         DateTime purgeEndTime = DateTime.UtcNow + TimeSpan.FromMinutes(1);
         using HttpResponseMessage purgeResponse = await HttpHelpers.InvokeHttpTrigger("PurgeOrchestrationHistory", $"?purgeEndTime={purgeEndTime:o}");
         string purgeMessage = await purgeResponse.Content.ReadAsStringAsync();