chore: add parallel GitHub Actions CI

.github/README.md

@@ -0,0 +1,25 @@
+# GitHub Actions overview
+
+`workflows/parallel-testing-ci.yml` runs the same parallel test strategy as
+`azure-pipelines.yml`.
+
+## Triggers
+
+The workflow runs for pull requests and pushes targeting `master`, on a weekly
+schedule at 03:00 UTC on Monday, and can also be started manually from the
+GitHub Actions page.
+
+## Parallel test execution
+
+The workflow creates five Ubuntu jobs with a matrix. Each job:
+
+1. Checks out the repository and installs the SDK specified by `global.json`.
+2. Restores dependencies and builds the project.
+3. Lists NUnit tests and sources `create_slicing_filter_condition.sh`.
+4. Sets the same `SYSTEM_TOTALJOBSINPHASE` and
+   `SYSTEM_JOBPOSITIONINPHASE` values used by Azure Pipelines, so each job runs
+   one fifth of the test suite.
+5. Runs its selected tests with `dotnet test --no-build --filter`.
+
+The matrix uses `fail-fast: false`, so all five slices finish and report their
+results even when one slice fails.

.github/workflows/parallel-testing-ci.yml

@@ -0,0 +1,48 @@
+name: Parallel Testing CI
+
+on:
+  schedule:
+    - cron: '0 3 * * 1'
+  workflow_dispatch:
+  push:
+    branches:
+      - master
+  pull_request:
+    branches:
+      - master
+
+jobs:
+  parallel-testing-ci:
+    name: Run tests in parallel (${{ matrix.slice }})
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        slice: [1, 2, 3, 4, 5]
+    env:
+      DOTNET_CLI_TELEMETRY_OPTOUT: 1
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Setup .NET SDK from global.json
+        uses: actions/setup-dotnet@v4
+        with:
+          global-json-file: global.json
+
+      - name: Restore
+        run: dotnet restore
+
+      - name: Build
+        run: dotnet build --no-restore
+
+      - name: List tests and create slicing filter
+        run: |
+          tests=($(dotnet test . --no-build --list-tests | grep Test_))
+          export SYSTEM_TOTALJOBSINPHASE=5
+          export SYSTEM_JOBPOSITIONINPHASE=${{ matrix.slice }}
+          . ./create_slicing_filter_condition.sh "${tests[@]}"
+          echo "targetTestsFilter=$targetTestsFilter" >> "$GITHUB_ENV"
+
+      - name: Test
+        run: dotnet test ./SliceTests/SliceTests.csproj --no-build --filter "$targetTestsFilter"

LICENSE

@@ -1,6 +1,6 @@
 MIT License
 
-Copyright (c) 2018-2019 idubnori
+Copyright (c) 2018-2026 idubnori
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
@@ -18,4 +18,4 @@ FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
-SOFTWARE.
+SOFTWARE.

README.md

@@ -7,6 +7,8 @@ This .NET 10 parallel testing sample uses `--list-tests` and `--filter` paramete
 
 This sample has the 100 tests, and slices them to 20 tests in 5 jobs. You can see the pipeline behavior result by clicking the build status badge above.
 
+For the GitHub Actions equivalent, see the [GitHub Actions overview](.github/README.md).
+
 ## Overview of *azure-pipelines.yml*
 
 ### Setting up parallel count

SliceTests/SliceTests.cs

@@ -41,6 +41,7 @@ public void TearDown()
         }
 
         [Test]
+        [Retry(3)]
         [TestCaseSource(nameof(Words))]
         public void SearchTest_ByWord_WordContainsInTitle(string word)
         {

create_slicing_filter_condition.sh

@@ -22,4 +22,5 @@ filter+="|${filterProperty}=${targetTestName}"
 done
 filter=${filter#"|"}
 
-echo "##vso[task.setvariable variable=targetTestsFilter]$filter"
+targetTestsFilter=$filter
+echo "##vso[task.setvariable variable=targetTestsFilter]$targetTestsFilter"