refactor: use explicit mocha imports (#284)

packages/google-cloud-bigquery-datatransfer/samples/quickstart.js

@@ -1,4 +1,4 @@
-// Copyright 2017, Google LLC All rights reserved.
+// Copyright 2017 Google LLC
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.

packages/google-cloud-bigquery-datatransfer/samples/test/quickstart.test.js

@@ -1,4 +1,4 @@
-// Copyright 2017, Google LLC All rights reserved.
+// Copyright 2017 Google LLC
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -15,12 +15,13 @@
 'use strict';
 
 const {assert} = require('chai');
+const {describe, it} = require('mocha');
 const cp = require('child_process');
 
 const execSync = cmd => cp.execSync(cmd, {encoding: 'utf-8'});
 
 describe('quickstart', () => {
-  it('should return a list of resources', async () => {
+  it('should return a list of resources', () => {
     const stdout = execSync('node quickstart');
     assert.match(stdout, /^Data sources/);
   });

packages/google-cloud-bigquery-datatransfer/smoke-test/.eslintrc.yml

@@ -1,5 +1,3 @@
 ---
-env:
-  mocha: true
 rules:
   no-console: off

packages/google-cloud-bigquery-datatransfer/smoke-test/data_transfer_service_smoke_test.js

@@ -14,6 +14,8 @@
 
 'use strict';
 
+const {describe, it} = require('mocha');
+
 describe('DataTransferServiceSmokeTest', () => {
   if (!process.env.GCLOUD_PROJECT) {
     throw new Error('Usage: GCLOUD_PROJECT=<project_id> node #{$0}');

packages/google-cloud-bigquery-datatransfer/system-test/.eslintrc.yml

@@ -1,5 +1,3 @@
 ---
-env:
-  mocha: true
 rules:
   no-console: off

packages/google-cloud-bigquery-datatransfer/test/gapic-v1.js

@@ -15,6 +15,7 @@
 'use strict';
 
 const assert = require('assert');
+const {describe, it} = require('mocha');
 
 const bigqueryDataTransferModule = require('../src');