test(Disconnect): Add closing db connection and shut downing mongod.

Author: nodkz

README.md

@@ -169,21 +169,28 @@ const User = mongoose.model('User', new mongoose.Schema({ name: String })); // d
 import mongoose from 'mongoose';
 import MongodbMemoryServer from 'mongodb-memory-server';
 
+let mongoServer;
+
 before((done) => {
-  const mongoServer = new MongodbMemoryServer();
+  mongoServer = new MongodbMemoryServer();
   mongoServer.getConnectionString().then((mongoUri) => {
     mongoose.connect(mongoUri, (err) => {
       done(err);
     });
   });
 });
 
+after(() => {
+  mongoose.disconnect();
+  mongoServer.stop();
+});
+
 describe('...', () => {
-    it("...", async () => {
-      const User = mongoose.model('User', new mongoose.Schema({ name: String }));
-      const cnt = await User.count();
-      expect(cnt).to.equal(0);
-    });
+  it("...", async () => {
+    const User = mongoose.model('User', new mongoose.Schema({ name: String }));
+    const cnt = await User.count();
+    expect(cnt).to.equal(0);
+  });
 });
 ```
 
@@ -195,25 +202,32 @@ import MongodbMemoryServer from 'mongodb-memory-server';
 // May require additional time for downloading MongoDB binaries
 jasmine.DEFAULT_TIMEOUT_INTERVAL = 20000;
 
+let mongoServer;
+
 beforeAll(async () => {
-  const mongoServer = new MongodbMemoryServer();
+  mongoServer = new MongodbMemoryServer();
   const mongoUri = await mongoServer.getConnectionString();
   mongoose.connect(mongoUri, (err) => {
     console.error(err);
   });
 });
 
+afterAll(() => {
+  mongoose.disconnect();
+  mongoServer.stop();
+});
+
 describe('...', () => {
-    it("...", async () => {
-      const User = mongoose.model('User', new mongoose.Schema({ name: String }));
-      const cnt = await User.count();
-      expect(cnt).toEqual(0);
-    });
+  it("...", async () => {
+    const User = mongoose.model('User', new mongoose.Schema({ name: String }));
+    const cnt = await User.count();
+    expect(cnt).toEqual(0);
+  });
 });
 ```
 
 Additional examples of Jest tests:
-- simple example with `mongodb` in [tests in current package](https://github.com/nodkz/mongodb-memory-server/blob/master/src/__tests__/index-test.js)
+- simple example with `mongodb` in [tests in current package](https://github.com/nodkz/mongodb-memory-server/blob/master/src/__tests__/)
 - more complex example with `mongoose` in [graphql-compose-mongoose](https://github.com/nodkz/graphql-compose-mongoose/blob/master/src/__mocks__/mongooseCommon.js)
 
 

src/__tests__/__snapshots__/index-test.js.snap

@@ -0,0 +1,15 @@
+// Jest Snapshot v1, https://goo.gl/fbAQLP
+
+exports[`Multiple mongoServers should start several servers 1`] = `
+Object {
+  "n": 2,
+  "ok": 1,
+}
+`;
+
+exports[`Multiple mongoServers should start several servers 2`] = `
+Object {
+  "n": 2,
+  "ok": 1,
+}
+`;

src/__tests__/__snapshots__/multipleDB-test.js.snap

@@ -0,0 +1,8 @@
+// Jest Snapshot v1, https://goo.gl/fbAQLP
+
+exports[`Single mongoServer should start mongo server 1`] = `
+Object {
+  "n": 2,
+  "ok": 1,
+}
+`;

src/__tests__/__snapshots__/singleDB-test.js.snap

@@ -0,0 +1,48 @@
+/* @flow */
+
+import MongoDBMemoryServer from '../index';
+import { MongoClient } from 'mongodb';
+
+jasmine.DEFAULT_TIMEOUT_INTERVAL = 20000;
+
+let db1;
+let db2;
+let mongoServer1;
+let mongoServer2;
+beforeAll(async () => {
+  mongoServer1 = new MongoDBMemoryServer();
+  const mongoUri = await mongoServer1.getConnectionString();
+  db1 = await MongoClient.connect(mongoUri);
+
+  mongoServer2 = new MongoDBMemoryServer();
+  const mongoUri2 = await mongoServer2.getConnectionString();
+  db2 = await MongoClient.connect(mongoUri2);
+});
+
+afterAll(() => {
+  db1.close();
+  db2.close();
+  mongoServer1.stop();
+  mongoServer2.stop();
+});
+
+describe('Multiple mongoServers', () => {
+  it('should start several servers', async () => {
+    const col1 = db1.collection('test');
+    const result1 = await col1.insert([{ a: 1 }, { b: 1 }]);
+    expect(result1.result).toMatchSnapshot();
+    expect(await col1.count({})).toBe(2);
+
+    const col2 = db2.collection('test');
+    const result2 = await col2.insert([{ a: 2 }, { b: 2 }]);
+    expect(result2.result).toMatchSnapshot();
+    expect(await col2.count({})).toBe(2);
+  });
+
+  it('should have different uri', async () => {
+    const uri1 = await mongoServer1.getConnectionString();
+    const uri2 = await mongoServer2.getConnectionString();
+
+    expect(uri1).not.toEqual(uri2);
+  });
+});

src/__tests__/index-test.js

@@ -0,0 +1,28 @@
+/* @flow */
+
+import MongoDBMemoryServer from '../index';
+import { MongoClient } from 'mongodb';
+
+jasmine.DEFAULT_TIMEOUT_INTERVAL = 20000;
+
+let db;
+let mongoServer;
+beforeAll(async () => {
+  mongoServer = new MongoDBMemoryServer();
+  const mongoUri = await mongoServer.getConnectionString();
+  db = await MongoClient.connect(mongoUri);
+});
+
+afterAll(() => {
+  db.close();
+  mongoServer.stop();
+});
+
+describe('Single mongoServer', () => {
+  it('should start mongo server', async () => {
+    const col = db.collection('test');
+    const result = await col.insert([{ a: 1 }, { b: 1 }]);
+    expect(result.result).toMatchSnapshot();
+    expect(await col.count({})).toBe(2);
+  });
+});