Improve some flaky tests (#4381)

Author: Evangelink

test/IntegrationTests/MSTest.Acceptance.IntegrationTests/RunsettingsTests.cs

@@ -2,7 +2,6 @@
 // Licensed under the MIT license. See LICENSE file in the project root for full license information.
 
 using System.Globalization;
-using System.Runtime.InteropServices;
 
 using Microsoft.Testing.Platform.Acceptance.IntegrationTests;
 using Microsoft.Testing.Platform.Acceptance.IntegrationTests.Helpers;
@@ -38,11 +37,6 @@ public sealed class RunSettingsTests : AcceptanceTestBase<RunSettingsTests.TestA
     [DynamicData(nameof(TargetFrameworks.AllForDynamicData), typeof(TargetFrameworks))]
     public async Task UnsupportedRunSettingsEntriesAreFlagged(string tfm)
     {
-        if (!RuntimeInformation.IsOSPlatform(OSPlatform.Windows) && tfm == TargetFrameworks.NetFramework.First())
-        {
-            return;
-        }
-
         var testHost = TestHost.LocateFrom(AssetFixture.ProjectPath, TestAssetFixture.ProjectName, tfm);
         TestHostResult testHostResult = await testHost.ExecuteAsync("--settings my.runsettings");
 
@@ -101,7 +95,7 @@ public sealed class TestAssetFixture() : TestAssetFixtureBase(AcceptanceFixture.
         {
             yield return (ProjectName, ProjectName,
                 SourceCode
-                .PatchTargetFrameworks(TargetFrameworks.NetCurrent, TargetFrameworks.NetFramework.First())
+                .PatchTargetFrameworks(TargetFrameworks.All)
                 .PatchCodeWithReplace("$MSTestVersion$", MSTestVersion));
         }
 

test/IntegrationTests/Microsoft.Testing.Platform.Acceptance.IntegrationTests/RetryFailedTestsTests.cs

@@ -3,6 +3,8 @@
 // Licensed under dual-license. See LICENSE.PLATFORMTOOLS.txt file in the project root for full license information.
 #pragma warning restore IDE0073 // The file header does not match the required text
 
+using System.Runtime.InteropServices;
+
 namespace Microsoft.Testing.Platform.Acceptance.IntegrationTests;
 
 [TestClass]
@@ -131,11 +133,18 @@ public async Task RetryFailedTests_MaxTestsCount_Succeeds(string tfm, bool fail)
         }
     }
 
-    // We use crash dump, not supported in NetFramework at the moment
     [TestMethod]
+    // We use crash dump, not supported in NetFramework at the moment
     [DynamicData(nameof(TargetFrameworks.NetForDynamicData), typeof(TargetFrameworks))]
     public async Task RetryFailedTests_MoveFiles_Succeeds(string tfm)
-        => await RetryHelper.RetryAsync(
+    {
+        // TODO: Crash dump is not working properly on macos, so we skip the test for now
+        if (RuntimeInformation.IsOSPlatform(OSPlatform.OSX))
+        {
+            return;
+        }
+
+        await RetryHelper.RetryAsync(
             async () =>
             {
                 var testHost = TestInfrastructure.TestHost.LocateFrom(AssetFixture.TargetAssetPath, AssetName, tfm);
@@ -171,6 +180,7 @@ public async Task RetryFailedTests_MoveFiles_Succeeds(string tfm)
                     Assert.Fail($"Expected 1 or 2 dump files, but found {dumpFilesCount}");
                 }
             }, 3, TimeSpan.FromSeconds(5));
+    }
 
     public sealed class TestAssetFixture() : TestAssetFixtureBase(AcceptanceFixture.NuGetGlobalPackagesFolder)
     {

test/UnitTests/Microsoft.Testing.Platform.UnitTests/Logging/FileLoggerTests.cs

@@ -176,12 +176,17 @@ public async Task Log_WhenSyncFlush_StreamWriterIsCalledOnlyWhenLogLevelAllowsIt
 
         if (LogTestHelpers.IsLogEnabled(defaultLogLevel, currentLogLevel))
         {
-            if (_memoryStream.Length == 0)
+            await _memoryStream.FlushAsync();
+            int iteration = 0;
+            while (_memoryStream.Length == 0 && iteration < 10)
             {
-                await Task.Delay(1000);
+                iteration++;
+                await Task.Delay(200);
             }
 
             await _memoryStream.FlushAsync();
+
+            _mockConsole.Verify(x => x.WriteLine(It.IsAny<string>()), Times.Never);
             Assert.AreEqual($"[00:00:00.000 Test - {currentLogLevel}] Message{Environment.NewLine}", Encoding.Default.GetString(_memoryStream.ToArray()));
         }
         else