chore: fix linting

gulpfile.js

@@ -1,4 +1,4 @@
-"use strict";
+'use strict';
 
 const gulp = require('gulp');
 const boilerplate = require('appium-gulp-plugins').boilerplate.use(gulp);

lib/fs.js

@@ -28,7 +28,7 @@ let fs = {
     try {
       await _mkdir(dirName);
     } catch (err) {
-      if (err && err.code !== "EEXIST") {
+      if (err && err.code !== 'EEXIST') {
         throw err;
       }
     }

lib/image-util.js

@@ -67,7 +67,7 @@ const AVAILABLE_MATCHING_FUNCTIONS = [
 async function getJimpImage (data) {
   return await new B((resolve, reject) => {
     if (!_.isString(data) && !_.isBuffer(data)) {
-      return reject(new Error("Must initialize jimp object with string or buffer"));
+      return reject(new Error('Must initialize jimp object with string or buffer'));
     }
     // if data is a string, assume it is a base64-encoded image
     if (_.isString(data)) {
@@ -78,7 +78,7 @@ async function getJimpImage (data) {
         return reject(err);
       }
       if (!imgObj) {
-        return reject(new Error("Could not create jimp image from that data"));
+        return reject(new Error('Could not create jimp image from that data'));
       }
       imgObj._getBuffer = imgObj.getBuffer.bind(imgObj);
       imgObj.getBuffer = B.promisify(imgObj._getBuffer, {context: imgObj});

lib/util.js

@@ -7,7 +7,7 @@ import fs from './fs';
 const W3C_WEB_ELEMENT_IDENTIFIER = 'element-6066-11e4-a52e-4f735466cecf';
 
 export function hasContent (val) {
-  return _.isString(val) && val !== "";
+  return _.isString(val) && val !== '';
 }
 
 // return true if the the value is not undefined, null, or NaN.
@@ -29,10 +29,10 @@ function escapeSpace (str) {
 }
 
 function escapeSpecialChars (str, quoteEscape) {
-  if (typeof str !== "string") {
+  if (typeof str !== 'string') {
     return str;
   }
-  if (typeof quoteEscape === "undefined") {
+  if (typeof quoteEscape === 'undefined') {
     quoteEscape = false;
   }
   str = str
@@ -46,7 +46,7 @@ function escapeSpecialChars (str, quoteEscape) {
     .replace(/[\"]/g, '\\"') // eslint-disable-line no-useless-escape
     .replace(/\\'/g, "\\'");
   if (quoteEscape) {
-    let re = new RegExp(quoteEscape, "g");
+    let re = new RegExp(quoteEscape, 'g');
     str = str.replace(re, `\\${quoteEscape}`);
   }
   return str;

test/fs-specs.js

@@ -8,10 +8,10 @@ let should = chai.should();
 
 describe('fs', function () {
   const existingPath = path.resolve(__dirname, 'fs-specs.js');
-  it("should exist", function () {
+  it('should exist', function () {
     should.exist(fs);
   });
-  it("should have expected methods", function () {
+  it('should have expected methods', function () {
     should.exist(fs.open);
     should.exist(fs.close);
     should.exist(fs.access);
@@ -25,24 +25,24 @@ describe('fs', function () {
     should.exist(fs.mv);
   });
 
-  describe("mkdir", function () {
-    let dirName = path.resolve(__dirname, "tmp");
+  describe('mkdir', function () {
+    let dirName = path.resolve(__dirname, 'tmp');
 
-    it("should make a directory that does not exist", async function () {
+    it('should make a directory that does not exist', async function () {
       await fs.rimraf(dirName);
       await fs.mkdir(dirName);
       let exists = await fs.hasAccess(dirName);
       exists.should.be.true;
     });
 
-    it("should not complain if the dir already exists", async function () {
+    it('should not complain if the dir already exists', async function () {
       let exists = await fs.hasAccess(dirName);
       exists.should.be.true;
       await fs.mkdir(dirName);
     });
 
-    it("should still throw an error if something else goes wrong", async function () {
-      await fs.mkdir("/bin/foo").should.be.rejected;
+    it('should still throw an error if something else goes wrong', async function () {
+      await fs.mkdir('/bin/foo').should.be.rejected;
     });
   });