feat(driverBench): Implementing DriverBench

Author: daprahamian

package.json

@@ -27,6 +27,7 @@
     "istanbul": "^0.4.5",
     "jsdoc": "3.5.4",
     "mongodb-extended-json": "^1.10.0",
+    "mongodb-extjson": "^2.1.0",
     "mongodb-mock-server": "^1.0.0",
     "mongodb-test-runner": "^1.1.18",
     "prettier": "^1.5.3",
@@ -47,7 +48,8 @@
     "coverage": "istanbul cover mongodb-test-runner -- -t 60000  test/unit test/functional",
     "lint": "eslint lib test",
     "format": "prettier --print-width 100 --tab-width 2 --single-quote --write 'test/**/*.js' 'lib/**/*.js'",
-    "changelog": "conventional-changelog -p angular -i HISTORY.md -s"
+    "changelog": "conventional-changelog -p angular -i HISTORY.md -s",
+    "bench": "node test/driverBench/"
   },
   "homepage": "https://github.com./mongodb/node-mongodb-native"
 }

test/driverBench/common.js

@@ -0,0 +1,82 @@
+'use strict';
+
+const fs = require('fs');
+const path = require('path');
+const MongoClient = require('../../lib/mongo_client');
+const GridFsBucket = require('../../lib/gridfs-stream');
+
+const DB_NAME = 'perftest';
+const COLLECTION_NAME = 'corpus';
+
+const SPEC_DIRECTORY = path.resolve(__dirname, 'spec');
+
+function loadSpecFile(filePath, encoding) {
+  const fp = [SPEC_DIRECTORY].concat(filePath);
+  return fs.readFileSync(path.join.apply(path, fp), encoding);
+}
+
+function loadSpecString(filePath) {
+  return loadSpecFile(filePath, 'utf8');
+}
+
+function makeClient() {
+  this.client = new MongoClient('mongodb://localhost:27017');
+}
+
+function connectClient() {
+  return this.client.connect();
+}
+
+function disconnectClient() {
+  this.client.close();
+}
+
+function initDb() {
+  this.db = this.client.db(DB_NAME);
+}
+
+function dropDb() {
+  return this.db.dropDatabase();
+}
+
+function createCollection() {
+  return this.db.createCollection(COLLECTION_NAME);
+}
+
+function initCollection() {
+  this.collection = this.db.collection(COLLECTION_NAME);
+}
+
+function dropCollection() {
+  return this.collection.drop();
+}
+
+function initBucket() {
+  this.bucket = new GridFsBucket(this.db);
+}
+
+function dropBucket() {
+  return this.bucket && this.bucket.drop();
+}
+
+function makeLoadJSON(name) {
+  return function() {
+    this.doc = JSON.parse(loadSpecString(['single_and_multi_document', name]));
+  };
+}
+
+module.exports = {
+  makeClient,
+  connectClient,
+  disconnectClient,
+  initDb,
+  dropDb,
+  createCollection,
+  initCollection,
+  dropCollection,
+  makeLoadJSON,
+  loadSpecFile,
+  loadSpecString,
+  initBucket,
+  dropBucket
+};