chore: add polkadotjs tests to ci

.github/workflows/tests.yml

@@ -153,6 +153,31 @@ jobs:
           push: false
           tags: chainsafe/gossamer:test
       -
-        name: Run stress
+        name: Run grandpa
         run: |
           docker run chainsafe/gossamer:test sh -c "make it-grandpa"
+
+  docker-polkadotjs-tests:
+    runs-on: ubuntu-latest
+    steps:
+      -
+        name: Set up QEMU
+        uses: docker/setup-qemu-action@v1
+      -
+        name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v1
+      -
+        name: Build
+        id: docker_build
+        uses: docker/build-push-action@v2
+        with:
+          load: true
+          file: ./Dockerfile
+          platforms: linux/amd64
+          push: false
+          tags: chainsafe/gossamer:test
+      -
+        name: Run polkadotjs tests
+        run: |
+          cd tests/polkadotjs_test && yarn
+          docker run chainsafe/gossamer:test sh -c "make it-polkadotjs"

Dockerfile

@@ -7,6 +7,9 @@ RUN apt-get update && \
     cmake \
     wget
 
+#Install yarn for polkadot-js tests
+RUN npm install -g yarn
+
 # Install Go
 RUN wget https://dl.google.com/go/go1.15.5.linux-amd64.tar.gz
 RUN tar -C /usr/local -xzf go1.15.5.linux-amd64.tar.gz