add test step to CI

.gitlab-ci.yml

@@ -0,0 +1,16 @@
+stages:
+  - test
+
+test:
+  stage: test
+  when:
+    - production
+  tags:
+    - aave-build-runner
+  before_script:
+    - docker-compose -f docker-compose.test.yml build
+  script:
+    - docker-compose -f docker-compose.test.yml run contracts-env npm run test
+  after_script:
+    - docker-compose -f docker-compose.test.yml run contracts-env npm run ci:clean
+    - docker-compose -f docker-compose.test.yml down

Dockerfile_test

@@ -0,0 +1,7 @@
+FROM node:13
+
+WORKDIR /app
+ADD  ./package-lock.json ./package.json /app/
+RUN npm ci
+
+ADD ./ /app/

docker-compose.test.yml

@@ -0,0 +1,7 @@
+version: "3.5"
+services:
+  dlp-contracts:
+    build:
+      context: ./
+      dockerfile: ./Dockerfile_test
+    command: npm run test

package.json

@@ -16,7 +16,8 @@
     "dev:coverage": "buidler coverage",
     "dev:deployment": "buidler dev-deployment",
     "dev:deployExample": "buidler deploy-Example",
-    "dev:prettier": "prettier --write ."
+    "dev:prettier": "prettier --write .",
+    "ci:clean": "rm -rf ./artifacts ./cache ./types"
   },
   "devDependencies": {
     "@nomiclabs/buidler": "1.4.4",