test: add em

Author: shellscape

README.md

@@ -53,6 +53,7 @@ Top-level keys are sorted according to a style commonly seen in the packages of
   'author',
   'homepage',
   'bugs',
+  'main',
   'engines',
   'scripts',
   'files',

lib/index.js

@@ -8,14 +8,15 @@
   The above copyright notice and this permission notice shall be
   included in all copies or substantial portions of this Source Code Form.
 */
-const { 'json-stringify': parser } = require('prettier/parser-babylon');
+const { parsers } = require('prettier/parser-babylon');
 
 const { sort } = require('./sort');
 
+const { 'json-stringify': parser } = parsers;
 const rePkg = /package\.json$/;
 
 const format = (input) => {
-  const result = sort(input);
+  const result = JSON.stringify(sort(input), null, 2);
   return result;
 };
 
@@ -24,10 +25,11 @@ exports.parsers = {
     ...parser,
     preprocess(input, options) {
       const { filepath } = options;
-      const text = parser.preprocess(input, options);
+      const text = parser.preprocess ? parser.preprocess(input, options) : input;
 
       if (rePkg.test(filepath)) {
-        return format(text);
+        const result = format(text);
+        return result;
       }
 
       return text;

lib/sort.js

@@ -17,13 +17,14 @@ const primary = [
   'author',
   'homepage',
   'bugs',
+  'main',
   'engines',
   'scripts',
   'files',
+  'keywords',
   'peerDependencies',
   'dependencies',
-  'devDependencies',
-  'keywords'
+  'devDependencies'
 ];
 
 const sort = (input) => {
@@ -38,6 +39,8 @@ const sort = (input) => {
       result[key] = pkg[key];
     }
   }
+
+  return result;
 };
 
 module.exports = { sort };

package.json

@@ -7,6 +7,7 @@
   "author": "shellscape",
   "homepage": "https://github.com/shellscape/prettier-plugin-package",
   "bugs": "https://github.com/shellscape/prettier-plugin-package/issues",
+  "main": "lib/index.js",
   "engines": {
     "node": ">= 8.0.0"
   },

test/snapshots/test.js.md

@@ -0,0 +1,83 @@
+# Snapshot report for `test/test.js`
+
+The actual snapshot is saved in `test.js.snap`.
+
+Generated by [AVA](https://ava.li).
+
+## randomize
+
+> Snapshot 1
+
+    `{␊
+      "name": "prettier-plugin-package",␊
+      "version": "0.1.0",␊
+      "description": "An opinionated package.json formatter plugin for Prettier",␊
+      "license": "MPL-2.0",␊
+      "repository": "shellscape/prettier-plugin-package",␊
+      "author": "shellscape",␊
+      "homepage": "https://github.com/shellscape/prettier-plugin-package",␊
+      "bugs": "https://github.com/shellscape/prettier-plugin-package/issues",␊
+      "main": "lib/index.js",␊
+      "engines": {␊
+        "node": ">= 8.0.0"␊
+      },␊
+      "scripts": {␊
+        "ci:coverage": "nyc npm run ci:test && nyc report --reporter=text-lcov > coverage.lcov",␊
+        "ci:lint": "npm run lint && npm run security",␊
+        "ci:lint:commits": "commitlint --from=${CIRCLE_BRANCH} --to=${CIRCLE_SHA1}",␊
+        "ci:test": "npm run test -- --verbose",␊
+        "commitlint": "commitlint",␊
+        "commitmsg": "commitlint -e $GIT_PARAMS",␊
+        "lint": "eslint --fix --cache lib test",␊
+        "lint-staged": "lint-staged",␊
+        "security": "npm audit",␊
+        "test": "ava"␊
+      },␊
+      "files": [␊
+        "lib/",␊
+        "README.md",␊
+        "LICENSE"␊
+      ],␊
+      "keywords": [␊
+        "package",␊
+        "package.json",␊
+        "plugin",␊
+        "prettier"␊
+      ],␊
+      "peerDependencies": {␊
+        "prettier": "^1.18.2"␊
+      },␊
+      "dependencies": {},␊
+      "devDependencies": {␊
+        "@commitlint/cli": "^8.1.0",␊
+        "@commitlint/config-conventional": "^8.1.0",␊
+        "ava": "^2.2.0",␊
+        "eslint-config-shellscape": "^2.0.2",␊
+        "execa": "^2.0.3",␊
+        "lint-staged": "^9.2.0",␊
+        "nyc": "^14.1.0",␊
+        "pre-commit": "^1.2.2",␊
+        "prettier": "^1.18.2"␊
+      },␊
+      "ava": {␊
+        "files": [␊
+          "!**/fixtures/**"␊
+        ]␊
+      },␊
+      "lint-staged": {␊
+        "*.js": [␊
+          "eslint --fix",␊
+          "git add"␊
+        ]␊
+      },␊
+      "nyc": {␊
+        "include": [␊
+          "lib/*.js"␊
+        ],␊
+        "exclude": [␊
+          "test/"␊
+        ]␊
+      },␊
+      "pre-commit": "lint-staged"␊
+    }␊
+    `

test/snapshots/test.js.snap

@@ -1,3 +1,34 @@
+const { join } = require('path');
+
 const test = require('ava');
+const prettier = require('prettier');
+
+const pkg = require('../package.json');
+
+const shuffle = (arr) => {
+  const result = arr.slice();
+  for (let i = result.length - 1; i > 0; i--) {
+    const rand = Math.floor(Math.random() * (i + 1));
+    [result[i], result[rand]] = [result[rand], result[i]];
+  }
+  return result;
+};
+
+test('randomize', (t) => {
+  const options = {
+    filepath: join(__dirname, 'package.json'),
+    parser: 'json-stringify',
+    plugins: ['.']
+  };
+  const keys = shuffle(Object.keys(pkg));
+  const fixture = {};
+
+  for (const key of keys) {
+    fixture[key] = pkg[key];
+  }
+
+  const input = JSON.stringify(fixture, null, 2);
+  const output = prettier.format(input, options);
 
-test('default', (t) => t.pass());
+  t.snapshot(output);
+});