Use github actions for test and build

diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
new file mode 100644
index 0000000..a1a9897
--- /dev/null
+++ b/.github/workflows/ci.yml

@@ -0,0 +1,41 @@
+name: CI
+
+on:
+  push:
+    branches: [master]
+  pull_request:
+    branches: [master]
+
+jobs:
+  test-build:
+    runs-on: ubuntu-latest
+
+    services:
+      pubsub:
+        image: knarz/pubsub-emulator:latest
+        env:
+          PUBSUB_EMULATOR_HOST: localhost:8085
+          PUBSUB_PROJECT_ID: casbin
+        ports:
+          - 8085:8085
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v1
+        with:
+          node-version: 12
+
+      - name: Install dependencies
+        run: npm ci
+
+      - name: test
+        run: npm test
+        env:
+          PUBSUB_EMULATOR_HOST: localhost:8085
+          PUBSUB_PROJECT_ID: casbin
+
+      - name: build
+        run: npm run build --if-present

diff --git a/README.md b/README.md
index b38ba5e..6c0d4eb 100644
--- a/README.md
+++ b/README.md

@@ -1,6 +1,7 @@
 # pubsub-watcher
 
 [![NPM version][npm-image]][npm-url]
+![CI](https://github.com/node-casbin/pubsub-watcher/workflows/CI/badge.svg)
 
 [npm-image]: https://img.shields.io/npm/v/@casbin/pubsub-watcher.svg?style=flat-square
 [npm-url]: https://npmjs.org/package/@casbin/pubsub-watcher
@@ -41,3 +42,10 @@
 # Test
 
 Set `GOOGLE_APPLICATION_CREDENTIALS` in environment variable and `npm run test`
+
+Test uses [Pub/Sub emulator](https://cloud.google.com/pubsub/docs/emulator)
+
+```sh
+gcloud beta emulators pubsub start --project=casbin
+PUBSUB_EMULATOR_HOST=localhost:8085 PUBSUB_PROJECT_ID=casbin npm run test
+```

diff --git a/package-lock.json b/package-lock.json
index 186ae8d..428df78 100644
--- a/package-lock.json
+++ b/package-lock.json

@@ -1,6 +1,6 @@
 {
   "name": "@casbin/pubsub-watcher",
-  "version": "1.0.0",
+  "version": "1.0.1",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {

diff --git a/test/watcher.test.ts b/test/watcher.test.ts
index 78f870b..08f1c57 100644
--- a/test/watcher.test.ts
+++ b/test/watcher.test.ts

@@ -13,19 +13,40 @@
 // limitations under the License.
 
 import { newEnforcer } from 'casbin';
+import { PubSub } from '@google-cloud/pubsub';
 import { PubsubWatcher } from '../src/watcher';
 
 describe('Test', () => {
+  const projectId = 'casbin';
+  const topicName = 'casbin';
+  const subscriptionName1 = 'sub_casbin_1';
+  const subscriptionName2 = 'sub_casbin_2';
+
   let watcher: PubsubWatcher;
   let updater: PubsubWatcher;
 
+  beforeAll(async () => {
+    const pubsub = new PubSub({ projectId });
+    const [topic] = await pubsub.createTopic(topicName);
+    console.log(`Topic ${topic.name} created.`);
+    await pubsub.topic(topicName).createSubscription(subscriptionName1);
+    await pubsub.topic(topicName).createSubscription(subscriptionName2);
+  });
+
+  afterAll(async () => {
+    const pubsub = new PubSub({ projectId });
+    await pubsub.topic(topicName).delete();
+    await pubsub.subscription(subscriptionName1).delete();
+    await pubsub.subscription(subscriptionName2).delete();
+  });
+
   afterEach(async () => {
     if (watcher) await watcher.close();
     if (updater) await updater.close();
   });
 
   test('Test1', async (done) => {
-    watcher = await PubsubWatcher.newWatcher(undefined, 'casbin', 'sub_casbin_1');
+    watcher = await PubsubWatcher.newWatcher({ projectId }, topicName, subscriptionName1);
     const enforcer = await newEnforcer('examples/authz_model.conf', 'examples/authz_policy.csv');
     enforcer.setWatcher(watcher);
     watcher.setUpdateCallback(done);
@@ -33,12 +54,14 @@
   });
 
   test('Test2', async (done) => {
-    watcher = await PubsubWatcher.newWatcher(undefined, 'casbin', 'sub_casbin_1');
+    watcher = await PubsubWatcher.newWatcher({ projectId }, topicName, subscriptionName1);
     const enforcer = await newEnforcer('examples/authz_model.conf', 'examples/authz_policy.csv');
     enforcer.setWatcher(watcher);
     watcher.setUpdateCallback(done);
 
-    updater = await PubsubWatcher.newWatcher(undefined, 'casbin', 'sub_casbin_2');
+    updater = await PubsubWatcher.newWatcher({ projectId }, topicName, subscriptionName2);
     await updater.update();
   });
+
+  afterAll(async () => {});
 });