add matchstick test to action

.github/workflows/ci.subgraph-beanstalk.yaml

@@ -44,7 +44,40 @@ jobs:
       - name: Build Subgraph
         run: yarn build
         working-directory: projects/subgraph-beanstalk
-    # TODO: add matchstick test suite
-    #- name: Run Tests
-    #  run: yarn test
-    #  working-directory: "${{ matrix.value }}"
+  test:
+    runs-on: macos-latest
+    name: Test
+    steps:
+      - name: Check out source repository
+        uses: actions/checkout@v3
+      - name: Setup Node
+        uses: actions/setup-node@v3
+        with:
+          node-version: "18"
+      - name: Cache Node Modules
+        id: node-modules-cache
+        uses: actions/cache@v3
+        with:
+          path: "**/node_modules"
+          key: ${{ runner.os }}-modules-${{ hashFiles('**/yarn.lock') }}
+      - name: Install The Graph CLI
+        run: npm install -g @graphprotocol/graph-cli
+      - name: Install Dependencies
+        if: steps.node-modules-cache.outputs.cache-hit != 'true'
+        run: yarn install --immutable
+
+      # Generate code and check for uncommitted changes
+      # https://github.com/marketplace/actions/check-uncommitted-changes
+      - name: Generate Subgraph Code
+        run: yarn codegen
+        working-directory: projects/subgraph-beanstalk
+      - name: Check for uncommitted changes
+        id: check-changes
+        uses: mskri/[email protected]
+      - name: Evaluate if there are changes
+        if: steps.check-changes.outputs.outcome == failure()
+        run: echo "There are uncommitted changes - execute 'yarn codegen' locally and commit the generated files!"
+
+      - name: Run Tests
+        run: yarn test
+        working-directory: projects/subgraph-beanstalk