* Re-try running tests in parallel by TFM, by generating a short UUID for entity names.

Author: lukebakken

Directory.Build.props

@@ -22,7 +22,12 @@
     <PublishRepositoryUrl>true</PublishRepositoryUrl>
     <RepositoryType>git</RepositoryType>
     <RepositoryUrl>https://github.com/rabbitmq/rabbitmq-amqp-dotnet-client</RepositoryUrl>
-    <TestTfmsInParallel>false</TestTfmsInParallel>
+    <!--
+      NOTE: un-comment this if it appears that connections or other entities that should be unique
+      are created at the same time. .NET 9 runs parallel test suites per-TFM
+      https://github.com/dotnet/sdk/issues/39470
+      <TestTfmsInParallel>false</TestTfmsInParallel>
+    -->
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
     <LangVersion>default</LangVersion>
   </PropertyGroup>

Tests/IntegrationTest.Static.cs

@@ -323,4 +323,6 @@ private static bool InitIsVerbose()
 
         return false;
     }
+
+    private static string GenerateShortUuid() => S_Random.Next().ToString("x");
 }

Tests/IntegrationTest.cs

@@ -33,7 +33,7 @@ public abstract partial class IntegrationTest : IAsyncLifetime
     protected IManagement? _management;
     protected string _queueName;
     protected string _exchangeName;
-    protected string _containerId = $"integration-test-{Now}";
+    protected string _containerId = $"integration-test-{Now}-{GenerateShortUuid()}";
 
     private readonly bool _setupConnectionAndManagement;
     protected readonly ConnectionSettingsBuilder _connectionSettingBuilder;
@@ -48,9 +48,9 @@ public IntegrationTest(ITestOutputHelper testOutputHelper,
 
         _testDisplayName = InitTestDisplayName();
 
-        _queueName = $"{_testDisplayName}-queue-{Now}";
-        _exchangeName = $"{_testDisplayName}-exchange-{Now}";
-        _containerId = $"{_testDisplayName}:{Now}";
+        _queueName = $"{_testDisplayName}-queue-{Now}-{GenerateShortUuid()}";
+        _exchangeName = $"{_testDisplayName}-exchange-{Now}-{GenerateShortUuid()}";
+        _containerId = $"{_testDisplayName}:{Now}-{GenerateShortUuid()}";
 
         if (IsVerbose)
         {
@@ -358,7 +358,9 @@ private string InitTestDisplayName()
             object? testObj = testMember.GetValue(_testOutputHelper);
             if (testObj is ITest test)
             {
-                rv = test.DisplayName;
+                rv = test.DisplayName
+                    .Replace("Test.", string.Empty)
+                    .Replace("Integration.", "I.");
             }
         }