CI: Run test stage once tests exist

.github/workflows/moodle-ci.yml

@@ -6,6 +6,9 @@ jobs:
   static:
     runs-on: ubuntu-latest
 
+    outputs:
+      has_tests: ${{ steps.check_tests.outputs.has_tests }}
+
     strategy:
       matrix:
         php: ['7.4']
@@ -21,6 +24,11 @@ jobs:
         with:
           path: plugin
 
+      - name: Check for test folder
+        id: check_tests
+        run: |
+          echo "::set-output name=has_tests::${{ hashFiles('plugin/tests') != '' }}"
+
       - name: Setup PHP ${{ matrix.php }}
         uses: shivammathur/setup-php@v2
         with:
@@ -81,7 +89,6 @@ jobs:
       - name: Moodle PHPDoc Checker
         if: ${{ always() }}
         run: moodle-plugin-ci phpdoc
-        continue-on-error: true
 
       - name: Validating
         if: ${{ always() }}
@@ -94,7 +101,6 @@ jobs:
       - name: Mustache Lint
         if: ${{ always() }}
         run: moodle-plugin-ci mustache
-        continue-on-error: true
 
       - name: Grunt
         if: ${{ always() }}
@@ -103,7 +109,7 @@ jobs:
   test:
     runs-on: ubuntu-latest
     needs: static
-    if: ${{ false }}
+    if: ${{ needs.static.outputs.has_tests == 'true' }}
 
     strategy:
       fail-fast: false
@@ -171,4 +177,4 @@ jobs:
 
       - name: Behat features
         if: ${{ always() }}
-        run: moodle-plugin-ci behat --profile chrome
+        run: moodle-plugin-ci behat --profile chrome