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Avoid more overhead of assembly initialize #4349

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Avoid more overhead of assembly initialize #4349

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Avoid more overhead of assembly initialize
nohwnd Dec 13, 2024
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nohwnd Dec 13, 2024
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16 changes: 13 additions & 3 deletions src/Adapter/MSTest.TestAdapter/Execution/UnitTestRunner.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -160,15 +160,25 @@ internal UnitTestResult[] RunSingleTest(TestMethod testMethod, IDictionary<strin
_fixtureTests.TryAdd(testMethod.AssemblyName, testMethodInfo);
_fixtureTests.TryAdd(testMethod.AssemblyName + testMethod.FullClassName, testMethodInfo);

UnitTestResult assemblyInitializeResult = RunAssemblyInitializeIfNeeded(testMethodInfo, testContext);
UnitTestResult? assemblyInitializeResult = null;

if (assemblyInitializeResult.Outcome != UnitTestOutcome.Passed)
if (!testMethodInfo.Parent.Parent.IsAssemblyInitializeExecuted)
{
assemblyInitializeResult = RunAssemblyInitializeIfNeeded(testMethodInfo, testContext);
}

if (assemblyInitializeResult != null && assemblyInitializeResult.Outcome != UnitTestOutcome.Passed)
Comment on lines +165 to +170
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This changes the semantics of the code I think.

Previously, if assembly initialize failed, we will attach the failure for every single test run. While now, it's only attached for the first test.

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from the code it looks like we prepare to capture outputs of the initialize method in every single test, but we actually run zero times or one time. so hopefully this changes nothing. We just prevent setting up capturing of output for method that will immediately return.

{
result = [assemblyInitializeResult];
}
else
{
UnitTestResult classInitializeResult = testMethodInfo.Parent.GetResultOrRunClassInitialize(testContext, assemblyInitializeResult.StandardOut!, assemblyInitializeResult.StandardError!, assemblyInitializeResult.DebugTrace!, assemblyInitializeResult.TestContextMessages!);
UnitTestResult classInitializeResult = testMethodInfo.Parent.GetResultOrRunClassInitialize(
testContext,
assemblyInitializeResult?.StandardOut ?? string.Empty,
assemblyInitializeResult?.StandardError ?? string.Empty,
assemblyInitializeResult?.DebugTrace ?? string.Empty,
assemblyInitializeResult?.TestContextMessages ?? string.Empty);
DebugEx.Assert(testMethodInfo.Parent.IsClassInitializeExecuted, "IsClassInitializeExecuted should be true after attempting to run it.");
if (classInitializeResult.Outcome != UnitTestOutcome.Passed)
{
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