Add integration test

Author: Donnerbart

.github/workflows/integration-test.yml

@@ -0,0 +1,91 @@
+name: Integration tests
+
+on:
+  push:
+    branches: ["**"]
+
+concurrency:
+  group: integration-test-${{ github.ref }}
+  cancel-in-progress: true
+
+env:
+  split-total: 4
+
+jobs:
+  generate-split-index-json:
+    name: Generate split indexes
+    runs-on: ubuntu-latest
+    outputs:
+      json: ${{ steps.generate.outputs.split-index-json }}
+    steps:
+      - name: Generate split index list
+        id: generate
+        uses: donnerbart/split-tests-java-action/generate-split-index-json@11efbe6f3e414504547447682e5b7eef6ac3e860 # v1
+        with:
+          split-total: ${{ env.split-total }}
+
+  integration-test:
+    name: "Test #${{ matrix.split-index }}"
+    runs-on: ubuntu-latest
+    needs:
+      - generate-split-index-json
+    permissions:
+      contents: read
+      checks: write
+    strategy:
+      fail-fast: false
+      matrix:
+        split-index: ${{ fromjson(needs.generate-split-index-json.outputs.json) }}
+    steps:
+      - name: Checkout split-test-java
+        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4
+
+      - name: Set up JDK 21
+        uses: actions/setup-java@3a4f6e1af504cf6a31855fa899c6aa5355ba6c12 # v4
+        with:
+          distribution: temurin
+          java-version: 21
+
+      - name: Split tests
+        id: split-tests
+        uses: donnerbart/split-tests-java-action@11efbe6f3e414504547447682e5b7eef6ac3e860 # v1
+        with:
+          split-index: ${{ matrix.split-index }}
+          split-total: ${{ env.split-total }}
+          glob: '**/src/test/resources/tests/*Test.java'
+          exclude-glob: '**/NoClassNameTest.java'
+          junit-glob: '**/src/test/resources/reports/*.xml'
+          format: 'list'
+          new-test-time: 'average'
+          calculate-optimal-total-split: true
+          debug: true
+
+      - name: Assert split tests
+        env:
+          SPLIT_INDEX: ${{ matrix.split-index }}
+          ACTUAL: ${{ steps.split-tests.outputs.test-suite }}
+        run: |
+          case "$SPLIT_INDEX" in
+            "0")
+            EXPECTED="de.donnerbart.example.SlowestTest"
+            ;;
+            "1")
+            EXPECTED="NoPackageTest de.donnerbart.example.ThirdPartyLibraryTest"
+            ;;
+            "2")
+            EXPECTED="de.donnerbart.example.NoTimingOneTest de.donnerbart.example.WhitespaceClassDefinitionTest"
+            ;;
+            "3")
+            EXPECTED="de.donnerbart.example.NoTimingOneTest de.donnerbart.example.WhitespaceClassDefinitionTest"
+            ;;
+            *)
+            echo "Unexpected split index"
+            exit 1
+            ;;
+          esac
+          echo "Expected: $EXPECTED"
+          echo "Actual: $ACTUAL"
+          if [ "$ACTUAL" != "$EXPECTED" ]; then
+            echo "The split tests are not matching"
+            exit 1
+          fi