setup testing using jest

.env.sample

@@ -2,4 +2,5 @@ POSTGRES_PASSWORD=admin
 POSTGRES_USER=admin
 POSTGRES_DB=karmaDB
 POSTGRES_HOST_PORT=5432
-ACCESS_TOKEN_SECRET=rabeehisawesome
+POSTGRES_TEST_PORT=5433
+ACCESS_TOKEN_SECRET=rabeehisawesome

.eslintrc.json

@@ -1,7 +1,10 @@
 {
   "parser": "babel-eslint",
   "extends": ["airbnb-base/legacy", "prettier", "plugin:node/recommended"],
-  "plugins": ["prettier"],
+  "plugins": ["prettier", "jest"],
+  "env": {
+    "jest/globals": true
+  },
   "rules": {
     "strict": "off",
     "prettier/prettier": "error",

README.md

@@ -19,6 +19,11 @@
   docker-compose up
   ```
 
+  If you plan to run tests use the following instead,
+  ```bash
+  docker-compose -f docker-compose.yaml -f db-test-service.yaml up
+  ```
+
 - Migrate and seed the database
 
   ```bash

db-test-service.yaml

@@ -0,0 +1,12 @@
+# optional - only for testing
+
+version: '3.1'
+services:
+  db-test:
+    image: postgres
+    environment:
+      POSTGRES_USER: ${POSTGRES_USER}
+      POSTGRES_PASSWORD: ${POSTGRES_PASSWORD}
+      POSTGRES_DB: ${POSTGRES_DB}
+    ports:
+      - ${POSTGRES_TEST_PORT}:5432

knexfile.js

@@ -18,4 +18,18 @@ module.exports = {
     },
     debug: true,
   },
+  test: {
+    client: 'pg',
+    connection: {
+      host: process.env.POSTGRES_HOST || '127.0.0.1',
+      port: process.env.POSTGRES_TEST_PORT,
+      user: process.env.POSTGRES_USER,
+      password: process.env.POSTGRES_PASSWORD,
+      database: process.env.POSTGRES_DB,
+    },
+    migrations: {
+      directory: './src/db/migrations',
+    },
+    debug: true,
+  },
 };

package.json

@@ -7,6 +7,7 @@
     "start": "nodemon src/server.js",
     "dev": "nodemon -e js,gql src/server.js",
     "lint": "eslint . --fix",
+    "test": "jest --verbose true",
     "migrate": "knex migrate:latest",
     "rollback": "knex migrate:rollback"
   },
@@ -43,10 +44,12 @@
     "eslint-config-node": "^4.1.0",
     "eslint-config-prettier": "^6.11.0",
     "eslint-plugin-import": "^2.21.2",
+    "eslint-plugin-jest": "^24.1.3",
     "eslint-plugin-node": "^11.1.0",
     "eslint-plugin-prettier": "^3.1.4",
     "faker": "^5.1.0",
     "husky": "^4.2.5",
+    "jest": "^26.6.3",
     "lint-staged": "^10.2.11",
     "nodemon": "^2.0.4",
     "prettier": "^2.0.5"

src/graphql/People/people.test.js

@@ -0,0 +1,42 @@
+const app = require('../../app');
+const connection = require('../../db/db');
+
+beforeAll(async () => {
+  await connection.migrate.latest();
+});
+
+afterAll(async () => {
+  await app.close();
+  await connection.migrate.rollback();
+  await connection.destroy();
+});
+
+describe('people data', () => {
+  const query = `
+    query {
+      people {
+        first_name
+      }
+    }
+  `;
+
+  test('initial people list is empty', async () => {
+    await app
+      .inject({
+        method: 'POST',
+        url: '/graphql',
+        payload: { query: query },
+        headers: { 'Content-Type': 'application/json' },
+      })
+      .then((res) => {
+        expect(res.statusCode).toBe(200);
+        let data = res.json();
+        console.log(data);
+        expect(data).not.toHaveProperty('errors');
+        expect(data).toHaveProperty('data.people');
+        let peopleData = data.data.people;
+        expect(peopleData).not.toBe(null);
+        expect(peopleData.length).toBe(0);
+      });
+  });
+});