refactor(gen:test): pull 4 helper functions out into a separate module

Author: Awk34

src/test/main.test.js

@@ -4,11 +4,15 @@ import fs from 'fs';
 import _ from 'lodash';
 import Promise from 'bluebird';
 Promise.promisifyAll(fs);
-import {exec} from 'child_process';
 import helpers from 'yeoman-test';
 import assert from 'yeoman-assert';
 import * as getExpectedFiles from './get-expected-files';
-import recursiveReadDir from 'recursive-readdir';
+import {
+  copyAsync,
+  runCmd,
+  assertOnlyFiles,
+  getConfig
+} from './test-helpers';
 
 const defaultOptions = {
   buildtool: 'grunt',
@@ -28,52 +32,6 @@ const defaultOptions = {
 };
 const TEST_DIR = __dirname;
 
-function copyAsync(src, dest) {
-  return fs.readFileAsync(src)
-    .then(data => fs.writeFileAsync(dest, data));
-}
-
-/**
- * @callback doneCallback
- * @param {null|Error} err
- */
-
-/**
- * Run the given command in a child process
- * @param {string} cmd - command to run
- * @param {doneCallback} done
- */
-function runCmd(cmd, done) {
-  exec(cmd, {}, function(err, stdout, stderr) {
-    if(err) {
-      console.error(stdout);
-      throw new Error(`Error running command: ${cmd}`);
-      done(err);
-    } else {
-      if(DEBUG) console.log(stdout);
-      done();
-    }
-  });
-}
-
-function assertOnlyFiles(expectedFiles, topLevelPath='./', skip=['node_modules', 'bower_components']) {
-  return new Promise((resolve, reject) => {
-    recursiveReadDir(topLevelPath, skip, function(err, actualFiles) {
-      if(err) return reject(err);
-
-      actualFiles = _.map(actualFiles.concat(), file => path.normalize(file.replace(path.normalize(`${topLevelPath}/`), '')));
-      expectedFiles = _.map(expectedFiles, file => path.normalize(file));
-
-      let extras = _.pullAll(actualFiles, expectedFiles);
-
-      if(extras.length !== 0) {
-        return reject(extras);
-      }
-      resolve();
-    });
-  });
-}
-
 function runGen(prompts) {
   return new Promise((resolve, reject) => {
     let dir;
@@ -130,12 +88,6 @@ function runEndpointGen(name, opt={}) {
   });
 }
 
-function getConfig(dir) {
-  return fs.readFileAsync(path.join(dir, '.yo-rc.json'), 'utf8').then(data => {
-    return JSON.parse(data);
-  });
-}
-
 describe('angular-fullstack:app', function() {
   beforeEach(function() {
     this.gen = runGen(defaultOptions);

src/test/test-helpers.js

@@ -0,0 +1,63 @@
+'use strict';
+import path from 'path';
+import fs from 'fs';
+import _ from 'lodash';
+import Promise from 'bluebird';
+Promise.promisifyAll(fs);
+import {exec} from 'child_process';
+import helpers from 'yeoman-test';
+import assert from 'yeoman-assert';
+import * as getExpectedFiles from './get-expected-files';
+import recursiveReadDir from 'recursive-readdir';
+
+export function copyAsync(src, dest) {
+  return fs.readFileAsync(src)
+    .then(data => fs.writeFileAsync(dest, data));
+}
+
+/**
+ * @callback doneCallback
+ * @param {null|Error} err
+ */
+
+/**
+ * Run the given command in a child process
+ * @param {string} cmd - command to run
+ * @param {doneCallback} done
+ */
+export function runCmd(cmd, done) {
+  exec(cmd, {}, function(err, stdout, stderr) {
+    if(err) {
+      console.error(stdout);
+      throw new Error(`Error running command: ${cmd}`);
+      done(err);
+    } else {
+      if(DEBUG) console.log(stdout);
+      done();
+    }
+  });
+}
+
+export function assertOnlyFiles(expectedFiles, topLevelPath='./', skip=['node_modules', 'bower_components']) {
+  return new Promise((resolve, reject) => {
+    recursiveReadDir(topLevelPath, skip, function(err, actualFiles) {
+      if(err) return reject(err);
+
+      actualFiles = _.map(actualFiles.concat(), file => path.normalize(file.replace(path.normalize(`${topLevelPath}/`), '')));
+      expectedFiles = _.map(expectedFiles, file => path.normalize(file));
+
+      let extras = _.pullAll(actualFiles, expectedFiles);
+
+      if(extras.length !== 0) {
+        return reject(extras);
+      }
+      resolve();
+    });
+  });
+}
+
+export function getConfig(dir) {
+  return fs.readFileAsync(path.join(dir, '.yo-rc.json'), 'utf8').then(data => {
+    return JSON.parse(data);
+  });
+}