Add k6 tests to the existing PR build and test action

.github/workflows/pr-build-and-e2e-tests.yml

@@ -134,3 +134,67 @@ jobs:
                   USER_KEY: admin
                   USER_SECRET: password
               run: pnpx wc-api-tests test api
+
+    k6-tests-run:
+      name: Runs k6 Performance tests
+      runs-on: ubuntu-18.04
+      needs: [build]
+      steps:
+          - name: Create dirs.
+            run: |
+                mkdir -p code/woocommerce
+                mkdir -p package/woocommerce
+                mkdir -p tmp/woocommerce
+                mkdir -p node_modules
+          - name: Checkout code.
+            uses: actions/checkout@v2
+            with:
+                path: package/woocommerce
+
+          - name: Install PNPM and install dependencies
+            working-directory: package/woocommerce
+            run: |
+                npm install -g pnpm
+                pnpm install
+
+          - name: Workaround to use initialization file with prepopulated data.
+            working-directory: package/woocommerce/plugins/woocommerce/tests/e2e/docker
+            run: |
+                cp init-sample-products.sh initialize.sh
+
+          - name: Load docker images and start containers.
+            working-directory: package/woocommerce/plugins/woocommerce
+            run: pnpx wc-e2e docker:up 
+
+          - name: Move current directory to code. We will install zip file in this dir later.
+            run: mv ./package/woocommerce/plugins/woocommerce/* ./code/woocommerce
+
+          - name: Download WooCommerce ZIP.
+            uses: actions/download-artifact@v2
+            with:
+                name: woocommerce
+                path: tmp
+
+          - name: Extract and replace WooCommerce zip.
+            working-directory: tmp
+            run: |
+                unzip woocommerce.zip -d woocommerce
+                mv woocommerce/woocommerce/* ../package/woocommerce/plugins/woocommerce/
+
+          - name: Install dependencies again
+            working-directory: package/woocommerce
+            run: |
+                npm install -g pnpm
+                pnpm install
+
+          - name: Wait for the Docker container to be built
+            working-directory: package/woocommerce/plugins/woocommerce
+            run: pnpx wc-e2e docker:wait
+
+          - name: Install k6
+            run: |
+                curl https://github.com/grafana/k6/releases/download/v0.33.0/k6-v0.33.0-linux-amd64.tar.gz -L | tar xvz --strip-components 1
+      
+          - name: Run k6 tests
+            run: |
+              ./k6 run package/woocommerce/plugins/woocommerce/tests/performance/tests/gh-action-pr-requests.js