Rewrite tests to be easier to write and maintain (#361)

.github/workflows/test-push.yml

@@ -1,10 +1,11 @@
 name: Run Tests
 on: [push, pull_request]
 jobs:
-  gradle:
+  build:
     strategy:
+      fail-fast: false
       matrix:
-        gradle: [4.9, 4.10.2, 6.8.2]
+        gradle: [4.9, 4.10.2, 6.8.3]
         java: [jdk8, jdk11, jdk15]
         exclude: # Dont run older gradle versions on newer java
           - java: jdk15
@@ -20,18 +21,52 @@ jobs:
       image: gradle:${{ matrix.gradle }}-${{ matrix.java }}
       options: --user root
     steps:
-      - uses: actions/checkout@v1
+      - uses: actions/checkout@v2
       - uses: gradle/wrapper-validation-action@v1
-      - run: gradle build check test --stacktrace
+      - run: gradle build check -x test --stacktrace
+
+  # This job is used to feed the test matrix of next job to allow the tests to run in parallel
+  prepare_test_matrix:
+    # Lets wait to ensure it builds before going running tests
+    needs: build
 
-  gradle_pre_release:
     runs-on: ubuntu-20.04
     container:
-      image: openjdk:8-jdk
+      image: gradle:6.8.3-jdk15
       options: --user root
+
     steps:
-      - uses: actions/checkout@v1
-      - run: ./gradlew wrapper --gradle-version=7.0-milestone-1
-      - run: ./gradlew build check test --stacktrace --warning-mode fail
+      - uses: actions/checkout@v2
+      - run: gradle writeActionsTestMatrix --stacktrace
+      -
+        id: set-matrix
+        run: echo "::set-output name=matrix::$(cat build/test_matrix.json)"
+
+    outputs:
+      matrix: ${{ steps.set-matrix.outputs.matrix }}
+
+  run_tests:
+    needs: prepare_test_matrix
+
+    strategy:
+      fail-fast: false
+      matrix:
+        java: [jdk8, jdk11, jdk15]
+        test: ${{ fromJson(needs.prepare_test_matrix.outputs.matrix) }}
+
+    runs-on: ubuntu-20.04
+    container:
+      image: gradle:6.8.3-${{ matrix.java }}
+      options: --user root
+
+    steps:
+      - uses: actions/checkout@v2
+      - run: gradle test --tests *${{ matrix.test }} --stacktrace
         env:
-          TEST_WARNING_MODE: fail
+          TEST_WARNING_MODE: fail
+
+      - uses: actions/upload-artifact@v2
+        if: ${{ always() }}
+        with:
+          name: ${{ matrix.test }} (${{ matrix.java }}) Results
+          path: build/reports/