fix: missing vstest outcomes, TestProjectDirectory heuristic, xmlns fallback

.github/skills/test-writing/SKILL.md

@@ -0,0 +1,17 @@
+---
+name: test-writing
+description: Use this skill when writing tests.
+---
+
+# TRX fixture policy for tests
+
+When adding or updating sample `.trx` files in this repository, use **real captured TRX output**, not synthetic hand-written fixtures.
+
+Required workflow:
+
+1. Create temporary tests that trigger the condition you need in the TRX.
+2. Run `dotnet test` with TRX output enabled to generate a real file.
+3. Copy that generated TRX file into `TrxLib.Tests/SampleTrxFiles/` (renaming is fine).
+4. Remove high-level personal/environment PII from the file (for example: username, machine name, local workspace paths), while preserving the TRX structure and semantics needed by tests.
+
+Do not fabricate TRX XML by hand when a real capture is possible.

TrxLib.Tests/SampleTrxFiles/aborted-outcome.trx

@@ -0,0 +1,55 @@
+<?xml version="1.0" encoding="utf-8"?>
+<TestRun id="6ee07f75-fb7c-472a-826e-76d151e1c033" name="sample@MACHINE 2026-05-17 00:09:42" runUser="MACHINE\sample" xmlns="http://microsoft.com/schemas/VisualStudio/TeamTest/2010">
+  <Times creation="2026-05-17T00:09:42.6672639-07:00" queuing="2026-05-17T00:09:42.6672644-07:00" start="2026-05-17T00:09:40.1879713-07:00" finish="2026-05-17T00:09:48.5593250-07:00" />
+  <TestSettings name="default" id="d5a33f7a-7488-410e-8195-3807f855af12">
+    <Deployment runDeploymentRoot="sample_MACHINE_2026-05-17_00_09_42" />
+  </TestSettings>
+  <Results>
+    <UnitTestResult executionId="2c44a0e5-0c78-4d78-9665-aa45a6d98f3f" testId="8a01445b-23e6-f125-1b18-0fa67670c70d" testName="TrxAbortGen.UnitTest1.FastTest" computerName="MACHINE" duration="00:00:00.0054353" startTime="2026-05-17T00:09:41.3979349-07:00" endTime="2026-05-17T00:09:41.3999615-07:00" testType="13cdc9d9-ddb5-4fa4-a97d-d965ccfc6d4b" outcome="Passed" testListId="8c84fa94-04c1-424b-9868-57a2d4851a1d" relativeResultsDirectory="2c44a0e5-0c78-4d78-9665-aa45a6d98f3f" />
+  </Results>
+  <TestDefinitions>
+    <UnitTest name="TrxAbortGen.UnitTest1.FastTest" storage="d:\sample\trxabortgen\bin\debug\net10.0\trxabortgen.dll" id="8a01445b-23e6-f125-1b18-0fa67670c70d">
+      <Execution id="2c44a0e5-0c78-4d78-9665-aa45a6d98f3f" />
+      <TestMethod codeBase="D:\sample\TrxAbortGen\bin\Debug\net10.0\TrxAbortGen.dll" adapterTypeName="executor://xunit/VsTestRunner3/netcore/" className="TrxAbortGen.UnitTest1" name="FastTest" />
+    </UnitTest>
+  </TestDefinitions>
+  <TestEntries>
+    <TestEntry testId="8a01445b-23e6-f125-1b18-0fa67670c70d" executionId="2c44a0e5-0c78-4d78-9665-aa45a6d98f3f" testListId="8c84fa94-04c1-424b-9868-57a2d4851a1d" />
+  </TestEntries>
+  <TestLists>
+    <TestList name="Results Not in a List" id="8c84fa94-04c1-424b-9868-57a2d4851a1d" />
+    <TestList name="All Loaded Results" id="19431567-8539-422a-85d7-44ee4e166bda" />
+  </TestLists>
+  <ResultSummary outcome="Failed">
+    <Counters total="1" executed="1" passed="1" failed="0" error="0" timeout="0" aborted="0" inconclusive="0" passedButRunAborted="0" notRunnable="0" notExecuted="0" disconnected="0" warning="0" completed="0" inProgress="0" pending="0" />
+    <Output>
+      <StdOut>[xUnit.net 00:00:00.00] xUnit.net VSTest Adapter v3.1.5+1b188a7b0a (64-bit .NET 10.0.8)&#xD;
+[xUnit.net 00:00:00.08]   Discovering: TrxAbortGen&#xD;
+[xUnit.net 00:00:00.12]   Discovered:  TrxAbortGen&#xD;
+[xUnit.net 00:00:00.14]   Starting:    TrxAbortGen&#xD;
+[createdump] Writing full dump for process 120264 to file C:\Temp\sample\testhost_120264_20260517T000946_hangdump.dmp&#xD;
+[createdump] Dump successfully written in 1772ms&#xD;
+</StdOut>
+    </Output>
+    <RunInfos>
+      <RunInfo computerName="MACHINE" outcome="Error" timestamp="2026-05-17T00:09:48.4883900-07:00">
+        <Text>The active test run was aborted. Reason: Test host process crashed</Text>
+      </RunInfo>
+      <RunInfo computerName="MACHINE" outcome="Warning" timestamp="2026-05-17T00:09:48.5003562-07:00">
+        <Text>Data collector 'Blame' message: The specified inactivity time of 5 seconds has elapsed. Collecting hang dumps from testhost and its child processes.</Text>
+      </RunInfo>
+    </RunInfos>
+    <CollectorDataEntries>
+      <Collector agentName="MACHINE" uri="datacollector://microsoft/TestPlatform/Extensions/Blame/v1" collectorDisplayName="Blame">
+        <UriAttachments>
+          <UriAttachment>
+            <A href="MACHINE\testhost_120264_20260517T000946_hangdump.dmp"></A>
+          </UriAttachment>
+          <UriAttachment>
+            <A href="MACHINE\Sequence_e25cc2d916314e8d81015e2757d19f02.xml"></A>
+          </UriAttachment>
+        </UriAttachments>
+      </Collector>
+    </CollectorDataEntries>
+  </ResultSummary>
+</TestRun>

TrxLib.Tests/SampleTrxFiles/no-namespace.trx

@@ -0,0 +1,69 @@
+<?xml version="1.0" encoding="utf-8"?>
+<TestRun id="b3f18c99-bcc6-465c-ba06-89825f441354" name="Utilizador@DESKTOP-PD528C3 2023-02-16 00:10:37" runUser="DESKTOP-PD528C3\Utilizador">
+  <Times creation="2023-02-16T00:10:37.0214256+00:00" queuing="2023-02-16T00:10:37.0214261+00:00" start="2023-02-16T00:10:36.0671216+00:00" finish="2023-02-16T00:10:37.0314500+00:00" />
+  <TestSettings name="default" id="202caf66-acc1-4c86-87c9-1e31b7b3ab0d">
+    <Deployment runDeploymentRoot="Utilizador_DESKTOP-PD528C3_2023-02-16_00_10_37" />
+  </TestSettings>
+  <Results>
+    <UnitTestResult executionId="55a45cd9-9f9a-4ee9-8df6-1135a7d047c0" testId="9e25854f-e30c-f2db-49d5-285adb0e9913" testName="SimpleNumberCompare(3,3)" computerName="DESKTOP-PD528C3" duration="00:00:00.0000100" startTime="2023-02-16T00:10:36.8483455+00:00" endTime="2023-02-16T00:10:36.8483552+00:00" testType="13cdc9d9-ddb5-4fa4-a97d-d965ccfc6d4b" outcome="Passed" testListId="8c84fa94-04c1-424b-9868-57a2d4851a1d" relativeResultsDirectory="55a45cd9-9f9a-4ee9-8df6-1135a7d047c0" />
+    <UnitTestResult executionId="1236f351-4887-4017-807c-1175b5cd36be" testId="f2de63e1-a2e1-134a-f0aa-aa4933f801df" testName="SimpleNumberCompare(2,2)" computerName="DESKTOP-PD528C3" duration="00:00:00.0001200" startTime="2023-02-16T00:10:36.8482138+00:00" endTime="2023-02-16T00:10:36.8483346+00:00" testType="13cdc9d9-ddb5-4fa4-a97d-d965ccfc6d4b" outcome="Passed" testListId="8c84fa94-04c1-424b-9868-57a2d4851a1d" relativeResultsDirectory="1236f351-4887-4017-807c-1175b5cd36be" />
+    <UnitTestResult executionId="73df5f45-aa3f-4cb4-8c4c-c8e702b53eb3" testId="bf3170b6-b1fd-cc8b-daa7-315dac1f80cc" testName="SimpleNumberCompare(4,4)" computerName="DESKTOP-PD528C3" duration="00:00:00.0000120" startTime="2023-02-16T00:10:36.8483593+00:00" endTime="2023-02-16T00:10:36.8483708+00:00" testType="13cdc9d9-ddb5-4fa4-a97d-d965ccfc6d4b" outcome="Passed" testListId="8c84fa94-04c1-424b-9868-57a2d4851a1d" relativeResultsDirectory="73df5f45-aa3f-4cb4-8c4c-c8e702b53eb3" />
+    <UnitTestResult executionId="6da6ef04-c861-456a-9228-67a8eaeb0dd6" testId="3ade358c-328b-c90b-7c97-c25ae8a92095" testName="SimpleStringCompare()" computerName="DESKTOP-PD528C3" duration="00:00:00.0362270" startTime="2023-02-16T00:10:36.8495258+00:00" endTime="2023-02-16T00:10:36.8857526+00:00" testType="13cdc9d9-ddb5-4fa4-a97d-d965ccfc6d4b" outcome="Failed" testListId="8c84fa94-04c1-424b-9868-57a2d4851a1d" relativeResultsDirectory="6da6ef04-c861-456a-9228-67a8eaeb0dd6">
+      <Output>
+        <ErrorInfo>
+          <Message>  Expected string length 5 but was 7. Strings differ at index 5.
+  Expected: "value"
+  But was:  "value 2"
+  ----------------^
+</Message>
+          <StackTrace>   at NUnitTestExample.Tests.SimpleStringCompare() in C:\Users\Utilizador\RiderProjects\TestSolution\NUnitTestExample\SimpleTest.cs:line 17
+</StackTrace>
+        </ErrorInfo>
+      </Output>
+    </UnitTestResult>
+    <UnitTestResult executionId="1926a0d8-a10a-49cb-9cc7-bc10b37e6125" testId="0a135621-0e2f-1240-b876-fb3dd56eadae" testName="SimpleNumberCompare(1,1)" computerName="DESKTOP-PD528C3" duration="00:00:00.0095590" startTime="2023-02-16T00:10:36.8360578+00:00" endTime="2023-02-16T00:10:36.8455393+00:00" testType="13cdc9d9-ddb5-4fa4-a97d-d965ccfc6d4b" outcome="Passed" testListId="8c84fa94-04c1-424b-9868-57a2d4851a1d" relativeResultsDirectory="1926a0d8-a10a-49cb-9cc7-bc10b37e6125" />
+  </Results>
+  <TestDefinitions>
+    <UnitTest name="SimpleNumberCompare(4,4)" storage="c:\users\utilizador\riderprojects\testsolution\nunittestexample\bin\debug\net6.0\nunittestexample.dll" id="bf3170b6-b1fd-cc8b-daa7-315dac1f80cc">
+      <Execution id="73df5f45-aa3f-4cb4-8c4c-c8e702b53eb3" />
+      <TestMethod codeBase="C:\Users\Utilizador\RiderProjects\TestSolution\NUnitTestExample\bin\Debug\net6.0\NUnitTestExample.dll" adapterTypeName="executor://nunit3testexecutor/" className="NUnitTestExample.Tests" name="SimpleNumberCompare(4,4)" />
+    </UnitTest>
+    <UnitTest name="SimpleNumberCompare(3,3)" storage="c:\users\utilizador\riderprojects\testsolution\nunittestexample\bin\debug\net6.0\nunittestexample.dll" id="9e25854f-e30c-f2db-49d5-285adb0e9913">
+      <Execution id="55a45cd9-9f9a-4ee9-8df6-1135a7d047c0" />
+      <TestMethod codeBase="C:\Users\Utilizador\RiderProjects\TestSolution\NUnitTestExample\bin\Debug\net6.0\NUnitTestExample.dll" adapterTypeName="executor://nunit3testexecutor/" className="NUnitTestExample.Tests" name="SimpleNumberCompare(3,3)" />
+    </UnitTest>
+    <UnitTest name="SimpleNumberCompare(2,2)" storage="c:\users\utilizador\riderprojects\testsolution\nunittestexample\bin\debug\net6.0\nunittestexample.dll" id="f2de63e1-a2e1-134a-f0aa-aa4933f801df">
+      <Execution id="1236f351-4887-4017-807c-1175b5cd36be" />
+      <TestMethod codeBase="C:\Users\Utilizador\RiderProjects\TestSolution\NUnitTestExample\bin\Debug\net6.0\NUnitTestExample.dll" adapterTypeName="executor://nunit3testexecutor/" className="NUnitTestExample.Tests" name="SimpleNumberCompare(2,2)" />
+    </UnitTest>
+    <UnitTest name="SimpleNumberCompare(1,1)" storage="c:\users\utilizador\riderprojects\testsolution\nunittestexample\bin\debug\net6.0\nunittestexample.dll" id="0a135621-0e2f-1240-b876-fb3dd56eadae">
+      <Execution id="1926a0d8-a10a-49cb-9cc7-bc10b37e6125" />
+      <TestMethod codeBase="C:\Users\Utilizador\RiderProjects\TestSolution\NUnitTestExample\bin\Debug\net6.0\NUnitTestExample.dll" adapterTypeName="executor://nunit3testexecutor/" className="NUnitTestExample.Tests" name="SimpleNumberCompare(1,1)" />
+    </UnitTest>
+    <UnitTest name="SimpleStringCompare()" storage="c:\users\utilizador\riderprojects\testsolution\nunittestexample\bin\debug\net6.0\nunittestexample.dll" id="3ade358c-328b-c90b-7c97-c25ae8a92095">
+      <Execution id="6da6ef04-c861-456a-9228-67a8eaeb0dd6" />
+      <TestMethod codeBase="C:\Users\Utilizador\RiderProjects\TestSolution\NUnitTestExample\bin\Debug\net6.0\NUnitTestExample.dll" adapterTypeName="executor://nunit3testexecutor/" className="NUnitTestExample.Tests" name="SimpleStringCompare()" />
+    </UnitTest>
+  </TestDefinitions>
+  <TestEntries>
+    <TestEntry testId="9e25854f-e30c-f2db-49d5-285adb0e9913" executionId="55a45cd9-9f9a-4ee9-8df6-1135a7d047c0" testListId="8c84fa94-04c1-424b-9868-57a2d4851a1d" />
+    <TestEntry testId="f2de63e1-a2e1-134a-f0aa-aa4933f801df" executionId="1236f351-4887-4017-807c-1175b5cd36be" testListId="8c84fa94-04c1-424b-9868-57a2d4851a1d" />
+    <TestEntry testId="bf3170b6-b1fd-cc8b-daa7-315dac1f80cc" executionId="73df5f45-aa3f-4cb4-8c4c-c8e702b53eb3" testListId="8c84fa94-04c1-424b-9868-57a2d4851a1d" />
+    <TestEntry testId="3ade358c-328b-c90b-7c97-c25ae8a92095" executionId="6da6ef04-c861-456a-9228-67a8eaeb0dd6" testListId="8c84fa94-04c1-424b-9868-57a2d4851a1d" />
+    <TestEntry testId="0a135621-0e2f-1240-b876-fb3dd56eadae" executionId="1926a0d8-a10a-49cb-9cc7-bc10b37e6125" testListId="8c84fa94-04c1-424b-9868-57a2d4851a1d" />
+  </TestEntries>
+  <TestLists>
+    <TestList name="Results Not in a List" id="8c84fa94-04c1-424b-9868-57a2d4851a1d" />
+    <TestList name="All Loaded Results" id="19431567-8539-422a-85d7-44ee4e166bda" />
+  </TestLists>
+  <ResultSummary outcome="Failed">
+    <Counters total="5" executed="5" passed="4" failed="1" error="0" timeout="0" aborted="0" inconclusive="0" passedButRunAborted="0" notRunnable="0" notExecuted="0" disconnected="0" warning="0" completed="0" inProgress="0" pending="0" />
+    <Output>
+      <StdOut>NUnit Adapter 4.2.0.0: Test execution started
+Running all tests in C:\Users\Utilizador\RiderProjects\TestSolution\NUnitTestExample\bin\Debug\net6.0\NUnitTestExample.dll
+   NUnit3TestExecutor discovered 5 of 5 NUnit test cases using Current Discovery mode, Non-Explicit run
+NUnit Adapter 4.2.0.0: Test execution complete
+</StdOut>
+    </Output>
+  </ResultSummary>
+</TestRun>

TrxLib.Tests/TrxParserTests.cs

@@ -325,6 +325,27 @@ public void Parse_Example2WindowsTrx_TestsDoNotAppearWithMoreThanOneOutcome()
         results.Count.Should().Be(recombinedCount);
     }
 
+    // ── Regression tests ─────────────────────────────────────────────────────────
+
+    [Fact]
+    public void Parse_AbortedRunTrx_ParsesRealAbortedRunFixture()
+    {
+        var results = TrxParser.Parse(new FileInfo(GetSampleFilePath("aborted-outcome.trx")));
+        results.Should().HaveCount(1);
+        results.Single().Outcome.Should().Be(TestOutcome.Passed);
+        results.OriginalTestRun?.ResultSummary?.Outcome.Should().Be("Failed");
+    }
+
+    // Real NUnit TRX captured without xmlns on the root element, sourced from:
+    // https://github.com/joaoopereira/dotnet-test-rerun/blob/main/test/dotnet-test-rerun.UnitTests/Fixtures/RerunCommand/NUnitTrxFileWithOneFailedTest.trx
+    [Fact]
+    public void Parse_NoNamespaceTrx_ParsesResultsWithoutNamespace()
+    {
+        var results = TrxParser.Parse(new FileInfo(GetSampleFilePath("no-namespace.trx")));
+        results.Should().HaveCount(5,
+            "the parser must fall back to namespace-agnostic element matching when xmlns is absent");
+    }
+
     [Fact]
     public void Parse_ComplexTrx_ParsesTestRunNameCorrectly()
     {