test: replace helpers with @webpack-utilities/test (#386)

Author: michael-ciniawsky

package.json

@@ -2,9 +2,9 @@
   "name": "postcss-loader",
   "version": "2.1.6",
   "description": "PostCSS loader for webpack",
-  "main": "lib/index.js",
+  "main": "src/index.js",
   "files": [
-    "lib"
+    "src"
   ],
   "engines": {
     "node": ">= 6"
@@ -16,21 +16,20 @@
     "schema-utils": "^0.4.0"
   },
   "devDependencies": {
-    "jest": "^22.0.0",
+    "@webpack-utilities/test": "^1.0.0-alpha.0",
+    "jest": "^23.0.0",
     "jsdoc-to-markdown": "^4.0.0",
-    "memory-fs": "^0.4.0",
     "postcss-import": "^11.0.0",
     "postcss-js": "^2.0.0",
     "standard": "^11.0.0",
     "standard-version": "^4.0.0",
     "sugarss": "^1.0.0",
-    "util.promisify": "^1.0.0",
-    "webpack": "^3.0.0"
+    "webpack": "^4.0.0"
   },
   "scripts": {
     "lint": "standard --env jest",
-    "test": "jest --env=node --verbose --coverage",
-    "docs": "jsdoc2md lib/index.js > LOADER.md",
+    "test": "jest --env node --verbose --coverage",
+    "docs": "jsdoc2md src/*.js > LOADER.md",
     "clean": "rm -rf coverage test/outputs",
     "release": "standard-version"
   },

lib/Error.js renamed to src/Error.js

@@ -1,31 +1,65 @@
-'use strict'
-
-const webpack = require('./helpers/compiler')
-const { loader } = require('./helpers/compilation')
+const { webpack } = require('@webpack-utilities/test')
 
 describe('Errors', () => {
   test('Validation Error', () => {
-    const loader = require('../lib')
+    const config = {
+      loader: {
+        test: /\.css$/,
+        options: {
+          sourceMap: 1
+        }
+      }
+    }
+
+    return webpack('css/index.js', config).then((stats) => {
+      const { source } = stats.toJson().modules[1]
 
-    const error = () => loader.call({ query: { sourceMap: 1 } })
+      // eslint-disable-next-line
+      const error = () => eval(source)
 
-    expect(error).toThrow()
-    expect(error).toThrowErrorMatchingSnapshot()
+      expect(error).toThrow()
+
+      try {
+        error()
+      } catch (err) {
+        const message = err.message
+          .split('\n')
+          .slice(1)
+          .join('\n')
+
+        expect(message).toMatchSnapshot()
+      }
+    })
   })
 
   test('Syntax Error', () => {
     const config = {
       loader: {
+        test: /\.css$/,
         options: {
           parser: 'sugarss'
         }
       }
     }
 
     return webpack('css/index.js', config).then((stats) => {
-      const error = loader(stats).err
+      const { source } = stats.toJson().modules[1]
 
-      expect(error[0]).toMatchSnapshot()
+      // eslint-disable-next-line
+      const error = () => eval(source)
+
+      expect(error).toThrow()
+
+      try {
+        error()
+      } catch (err) {
+        const message = err.message
+          .split('\n')
+          .slice(1)
+          .join('\n')
+
+        expect(message).toMatchSnapshot()
+      }
     })
   })
 })

lib/index.js renamed to src/index.js

@@ -1,18 +1,18 @@
 // Jest Snapshot v1, https://goo.gl/fbAQLP
 
 exports[`Errors Syntax Error 1`] = `
-[ModuleBuildError: Module build failed: Syntax Error 
+"Syntax Error 
 
 (1:3) Unexpected separator in property
 
 > 1 | a { color: black }
     |   ^
   2 | 
-]
+"
 `;
 
 exports[`Errors Validation Error 1`] = `
-"PostCSS Loader Invalid Options
+"ValidationError: PostCSS Loader Invalid Options
 
 options.sourceMap should be string,boolean
 "

lib/options.js renamed to src/options.js

@@ -1,9 +1,3 @@
 // Jest Snapshot v1, https://goo.gl/fbAQLP
 
 exports[`Loader Default 1`] = `"module.exports = \\"a { color: black }\\\\n\\""`;
-
-exports[`Loader Watching Dependencies Error 1`] = `"module.exports = \\"a { color: black }\\\\n\\""`;
-
-exports[`Loader Watching Dependencies Error 2`] = `"throw new Error(\\"Module build failed: Syntax Error \\\\n\\\\n(1:5) Unknown word\\\\n\\\\n\\\\u001b[31m\\\\u001b[1m>\\\\u001b[22m\\\\u001b[39m\\\\u001b[90m 1 | \\\\u001b[39ma \\\\u001b[33m{\\\\u001b[39m color black \\\\u001b[33m}\\\\u001b[39m\\\\n \\\\u001b[90m   | \\\\u001b[39m    \\\\u001b[31m\\\\u001b[1m^\\\\u001b[22m\\\\u001b[39m\\\\n \\\\u001b[90m 2 | \\\\u001b[39m\\\\n\\");"`;
-
-exports[`Loader Watching Dependencies Error 3`] = `"module.exports = \\"a { color: black }\\\\n\\""`;