Replace gulp/mocha/mockery/istanbul with Jest (#187)

* Replace gulp/mocha/mockery/istanbul with Jest

… and add a yarn lock file.

* Fix test mocks

* Fix eslint ignore path

* Match generator-node

* Ignore templates when running tests

* Add .eslintignore

* Rename test directory in `USAGE`

.eslintignore

@@ -0,0 +1 @@
+app/templates

.travis.yml

@@ -4,3 +4,4 @@ node_js:
   - node
   - 6
   - 4
+after_script: 'cat ./coverage/lcov.info | coveralls'

README.md

@@ -36,10 +36,9 @@ Scaffolds out a complete generator directory structure for you:
 ├── .travis.yml
 ├── .yo-rc.json
 ├── package.json
-├── gulpfile.js
 ├── README.md
 ├── LICENSE
-└── test/
+└── __tests__/
     └── app.js
 ```
 

test/app.js → __tests__/app.js

@@ -2,31 +2,14 @@
 const path = require('path');
 const assert = require('yeoman-assert');
 const helpers = require('yeoman-test');
-const mockery = require('mockery');
 const generatorGeneratorPkg = require('../package.json');
 
-describe('generator:app', () => {
-  before(() => {
-    mockery.enable({
-      warnOnReplace: false,
-      warnOnUnregistered: false
-    });
-
-    mockery.registerMock('superb', () => {
-      return 'cat\'s meow';
-    });
-
-    mockery.registerMock('npm-name', () => {
-      return Promise.resolve(true);
-    });
-  });
-
-  after(() => {
-    mockery.disable();
-  });
+jest.mock('superb', () => () => 'cat\'s meow');
+jest.mock('npm-name', () => () => Promise.resolve(true));
 
+describe('generator:app', () => {
   describe('defaults', () => {
-    before(() => {
+    beforeEach(() => {
       return helpers.run(path.join(__dirname, '../app'))
         .withPrompts({
           name: 'generator-temp',

test/subgenerator.js → __tests__/subgenerator.js

@@ -3,19 +3,11 @@ const path = require('path');
 const assert = require('yeoman-assert');
 const helpers = require('yeoman-test');
 const fs = require('fs');
-const mockery = require('mockery');
 
-describe('generator:subgenerator', () => {
-  before(() => {
-    mockery.enable({
-      warnOnReplace: false,
-      warnOnUnregistered: false
-    });
-
-    mockery.registerMock('superb', () => {
-      return 'cat\'s meow';
-    });
+jest.mock('superb', () => () => 'cat\'s meow');
 
+describe('generator:subgenerator', () => {
+  beforeEach(() => {
     return helpers.run(path.join(__dirname, '../subgenerator'))
       .withArguments(['foo'])
       .withOptions({
@@ -29,10 +21,6 @@ describe('generator:subgenerator', () => {
       });
   });
 
-  after(() => {
-    mockery.disable();
-  });
-
   it('creates files', () => {
     assert.file([
       'generators/foo/index.js',

app/USAGE

@@ -10,4 +10,4 @@ Example:
 
         generator/app/index.js: Main generator script
         generator/app/templates/: Templates for files created by your generator
-        test/: Unit tests for your generator
+        __test__/: Unit tests for your generator

app/index.js

@@ -73,6 +73,9 @@ module.exports = class extends Generator {
       devDependencies: {
         'yeoman-test': generatorGeneratorPkg.devDependencies['yeoman-test'],
         'yeoman-assert': generatorGeneratorPkg.devDependencies['yeoman-assert']
+      },
+      jest: {
+        testPathIgnorePatterns: ['templates']
       }
     });
     pkg.keywords = pkg.keywords || [];

package.json

@@ -18,8 +18,9 @@
   ],
   "repository": "yeoman/generator-generator",
   "scripts": {
-    "test": "gulp",
-    "prepublish": "gulp prepublish"
+    "test": "jest",
+    "pretest": "eslint . --ignore-path .gitignore --fix",
+    "prepublish": "nsp check"
   },
   "engines": {
     "node": ">=4.0.0"
@@ -36,27 +37,27 @@
     "yosay": "^2.0.0"
   },
   "devDependencies": {
-    "eslint": "^3.15.0",
+    "coveralls": "^2.12.0",
+    "eslint": "^3.18.0",
     "eslint-config-xo-space": "^0.16.0",
-    "gulp": "^3.9.1",
-    "gulp-coveralls": "^0.1.4",
-    "gulp-eslint": "^3.0.1",
-    "gulp-exclude-gitignore": "^1.1.1",
-    "gulp-istanbul": "^1.1.1",
-    "gulp-mocha": "^3.0.1",
-    "gulp-nsp": "^2.4.2",
-    "gulp-plumber": "^1.1.0",
-    "mocha": "^3.2.0",
-    "mockery": "^2.0.0",
+    "jest": "^19.0.2",
+    "jest-cli": "^19.0.2",
+    "nsp": "^2.6.3",
     "yeoman-assert": "^3.0.0",
     "yeoman-test": "^1.6.0"
   },
   "eslintConfig": {
     "extends": "xo-space",
     "env": {
-      "mocha": true,
-      "jest": true
+      "jest": true,
+      "node": true
     }
   },
+  "jest": {
+    "testEnvironment": "node",
+    "testPathIgnorePatterns": [
+      "templates"
+    ]
+  },
   "license": "MIT"
 }