Fix ConditionalFact and ConditionalTheory (dotnet/extensions#2241)

\n\nCommit migrated from ae9d51ffeb

src/Testing/src/xunit/ConditionalFactAttribute.cs

@@ -8,7 +8,7 @@ using Xunit.Sdk;
 namespace Microsoft.AspNetCore.Testing
 {
     [AttributeUsage(AttributeTargets.Method, AllowMultiple = false)]
-    [XunitTestCaseDiscoverer("Microsoft.AspNetCore.Testing.xunit." + nameof(ConditionalFactDiscoverer), "Microsoft.AspNetCore.Testing")]
+    [XunitTestCaseDiscoverer("Microsoft.AspNetCore.Testing." + nameof(ConditionalFactDiscoverer), "Microsoft.AspNetCore.Testing")]
     public class ConditionalFactAttribute : FactAttribute
     {
     }

src/Testing/src/xunit/ConditionalTheoryAttribute.cs

@@ -8,7 +8,7 @@ using Xunit.Sdk;
 namespace Microsoft.AspNetCore.Testing
 {
     [AttributeUsage(AttributeTargets.Method, AllowMultiple = false)]
-    [XunitTestCaseDiscoverer("Microsoft.AspNetCore.Testing.xunit." + nameof(ConditionalTheoryDiscoverer), "Microsoft.AspNetCore.Testing")]
+    [XunitTestCaseDiscoverer("Microsoft.AspNetCore.Testing." + nameof(ConditionalTheoryDiscoverer), "Microsoft.AspNetCore.Testing")]
     public class ConditionalTheoryAttribute : TheoryAttribute
     {
     }

src/Testing/test/AlphabeticalOrderer.cs

@@ -0,0 +1,22 @@
+// Copyright (c) .NET Foundation. All rights reserved.
+// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
+
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using Xunit.Abstractions;
+using Xunit.Sdk;
+
+namespace Microsoft.AspNetCore.Testing
+{
+    public class AlphabeticalOrderer : ITestCaseOrderer
+    {
+        public IEnumerable<TTestCase> OrderTestCases<TTestCase>(IEnumerable<TTestCase> testCases)
+                where TTestCase : ITestCase
+        {
+            var result = testCases.ToList();
+            result.Sort((x, y) => StringComparer.OrdinalIgnoreCase.Compare(x.TestMethod.Method.Name, y.TestMethod.Method.Name));
+            return result;
+        }
+    }
+}

src/Testing/test/ConditionalFactTest.cs

@@ -2,11 +2,11 @@
 // Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
 
 using System;
-using Microsoft.AspNetCore.Testing;
 using Xunit;
 
 namespace Microsoft.AspNetCore.Testing
 {
+    [TestCaseOrderer("Microsoft.AspNetCore.Testing.AlphabeticalOrderer", "Microsoft.AspNetCore.Testing.Tests")]
     public class ConditionalFactTest : IClassFixture<ConditionalFactTest.ConditionalFactAsserter>
     {
         public ConditionalFactTest(ConditionalFactAsserter collector)
@@ -47,13 +47,19 @@ namespace Microsoft.AspNetCore.Testing
 #error Target frameworks need to be updated.
 #endif
 
+        // Test is named this way to be the lowest test in the alphabet, it relies on test ordering
+        [Fact]
+        public void ZzzzzzzEnsureThisIsTheLastTest()
+        {
+            Assert.True(Asserter.TestRan);
+        }
+
         public class ConditionalFactAsserter : IDisposable
         {
             public bool TestRan { get; set; }
 
             public void Dispose()
             {
-                Assert.True(TestRan, "If this assertion fails, a conditional fact wasn't discovered.");
             }
         }
     }

src/Testing/test/ConditionalTheoryTest.cs

@@ -2,12 +2,12 @@
 // Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
 
 using System;
-using Microsoft.AspNetCore.Testing;
 using Xunit;
 using Xunit.Abstractions;
 
 namespace Microsoft.AspNetCore.Testing
 {
+    [TestCaseOrderer("Microsoft.AspNetCore.Testing.AlphabeticalOrderer", "Microsoft.AspNetCore.Testing.Tests")]
     public class ConditionalTheoryTest : IClassFixture<ConditionalTheoryTest.ConditionalTheoryAsserter>
     {
         public ConditionalTheoryTest(ConditionalTheoryAsserter asserter)
@@ -101,6 +101,13 @@ namespace Microsoft.AspNetCore.Testing
 #error Target frameworks need to be updated.
 #endif
 
+        // Test is named this way to be the lowest test in the alphabet, it relies on test ordering
+        [Fact]
+        public void ZzzzzzzEnsureThisIsTheLastTest()
+        {
+            Assert.True(Asserter.TestRan);
+        }
+
         public static TheoryData<Func<int, int>> GetActionTestData
             => new TheoryData<Func<int, int>>
             {
@@ -113,7 +120,6 @@ namespace Microsoft.AspNetCore.Testing
 
             public void Dispose()
             {
-                Assert.True(TestRan, "If this assertion fails, a conditional theory wasn't discovered.");
             }
         }