update babylon to babel/parser 7.x (#30)

* update babylon to babel/parser 7.x

* fix snapshot.test and typing

* update changelog

* remove @flow from parser_tests.js

* revert import in parser_tests.js

* increase test coverage

* remove typescript

* make options optional

* add addtional plugins

* Update CHANGELOG.md

Co-Authored-By: Sean Poulter <sean.poulter+gh@gmail.com>

* fix changelog

* add support for mjs

* make ECMA Proposal plugins configurable

* update readme

* remove package-lock.json

* move typescript to devDependencies

* extend readme

* extend default plugin list

* update plugin list

* increadse node_js to 10 in travis.yml

* update readme

* fix prettier

Co-authored-by: Sean Poulter <sean.poulter+gh@gmail.com>
Co-authored-by: Tristan Teufel <tristant@CI327.fritz.box>

Author: 3 people

.travis.yml

@@ -1,6 +1,6 @@
 language: node_js
 node_js:
-  - "8"
+  - "10"
 script:
   - yarn ci
   - cat ./coverage/lcov.info | ./node_modules/coveralls/bin/coveralls.js && rm -rf ./coverage

CHANGELOG.md

@@ -4,8 +4,7 @@ Please add your own contribution below inside the Master section
 Bug-fixes within the same version aren't needed
 
 ## Master
-
-  
+* Replace babylon and typescript parsers with @babel/parser 7.x - @firsttris 
 -->
 
 ### 27.2.0
@@ -51,4 +50,3 @@ in your head, consider this a 1.0 kinda thing.
   look at the usage of the `buildSnapshotResolver`
 
 - Adds the ability to parse describe blocks - https://github.com/facebook/jest/pull/7215
-

README.md

@@ -10,7 +10,22 @@ The engine that allows editors to build on top of Jest.
 
 This is only useful if you are interested in building an editor integration for Jest.
 
-For now as an end user, we'd recommend looking at either [vscode-jest](https://github.com/jest-community/vscode-jest/) or [majestic](https://github.com/Raathigesh/majestic/).
+## API
+```
+parse(   
+  filePath: string,   
+  serializedData?: string,   
+  strictMode: boolean = false,     
+)
+```
+Parse is a static Jest parser which uses Babel 7 and supports js,jsx,mjs,ts,tsx files.   
+
+[Supported ECMAScript proposals](https://github.com/babel/babel/blob/928b9f8c9518284eac6d0598633f2ec373fc6d0c/packages/babel-parser/typings/babel-parser.d.ts#L97)
+
+- filePath = Path to the file you want to parse.
+- serializedData = Serialized data, will be used instead of the filePath if available (optional).
+- strictMode = If this option is activated the parser throws an exception if the filetype is not detected, defaults to false.
+
 
 ## Note
 

fixtures/parser_tests.js

@@ -3,26 +3,21 @@
  *
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
+ *
  */
 
 const fixtures = __dirname;
 
-function parserTests(parse: (file: string) => ParserResult) {
-  const assertBlock2 = (
-    block,
-    sl: number,
-    sc: number,
-    el: number,
-    ec: number,
-    name: ?string = null,
-  ) => assertBlock(block, {column: sc, line: sl}, {column: ec, line: el}, name);
+function parserTests(parse: (file: string) => ParseResult) {
   const assertBlock = (block, start, end, name: ?string = null) => {
     expect(block.start).toEqual(start);
     expect(block.end).toEqual(end);
     if (name) {
       expect(block.name).toEqual(name);
     }
   };
+  const assertBlock2 = (block, sl: number, sc: number, el: number, ec: number, name: ?string = null) =>
+    assertBlock(block, {column: sc, line: sl}, {column: ec, line: el}, name);
   describe('File parsing without throwing', () => {
     it('Should not throw', () => {
       expect(() => {
@@ -174,12 +169,7 @@ function parserTests(parse: (file: string) => ParserResult) {
       expect(data.describeBlocks.length).toEqual(4);
 
       const firstDescribe = data.describeBlocks[0];
-      assertBlock(
-        firstDescribe,
-        {column: 1, line: 10},
-        {column: 2, line: 20},
-        '.isCI',
-      );
+      assertBlock(firstDescribe, {column: 1, line: 10}, {column: 2, line: 20}, '.isCI');
     });
     it('finds test blocks within describe blocks', () => {
       const data = parse(`${fixtures}/dangerjs/travis-ci.example`);
@@ -191,7 +181,7 @@ function parserTests(parse: (file: string) => ParserResult) {
         b =>
           b.name === 'needs to have a PR number' ||
           b.name === 'does not validate without josh' ||
-          b.name === 'does not validate when ${key} is missing',
+          b.name === 'does not validate when ${key} is missing'
       );
       expect(found.length).toBe(3);
     });
@@ -200,9 +190,7 @@ function parserTests(parse: (file: string) => ParserResult) {
     let nested;
     beforeEach(() => {
       const data = parse(`${fixtures}/nested_elements.example`);
-      nested = data.root.children.filter(
-        e => e.type === 'describe' && e.name === 'describe 1.0',
-      )[0];
+      nested = data.root.children.filter(e => e.type === 'describe' && e.name === 'describe 1.0')[0];
     });
     it('can find nested describe or test blocks', () => {
       expect(nested.children.length).toBe(2);
@@ -233,58 +221,32 @@ function parserTests(parse: (file: string) => ParserResult) {
       expect(parseResult.expects.length).toEqual(4);
     });
     test(`no expression template`, () => {
-      const dBlock = parseResult.describeBlocks.filter(
-        b => b.name === 'no expression template',
-      )[0];
+      const dBlock = parseResult.describeBlocks.filter(b => b.name === 'no expression template')[0];
       const t1 = dBlock.children[0];
       const e1 = t1.children[0];
 
       expect(dBlock.children.length).toBe(1);
       expect(t1.children.length).toBe(1);
 
-      assertBlock(
-        t1,
-        {column: 3, line: 2},
-        {column: 5, line: 4},
-        'test has no expression either',
-      );
+      assertBlock(t1, {column: 3, line: 2}, {column: 5, line: 4}, 'test has no expression either');
       assertBlock(e1, {column: 5, line: 3}, {column: 25, line: 3});
     });
 
     test(`simple template literal`, () => {
-      const dBlock = parseResult.describeBlocks.filter(
-        b => b.name === 'simple template literal',
-      )[0];
+      const dBlock = parseResult.describeBlocks.filter(b => b.name === 'simple template literal')[0];
       expect(dBlock.children.length).toBe(3);
 
       const t1 = dBlock.children[0];
       const t2 = dBlock.children[1];
       const t3 = dBlock.children[2];
 
-      assertBlock(
-        t1,
-        {column: 3, line: 8},
-        {column: 46, line: 8},
-        '${expression} up front',
-      );
-      assertBlock(
-        t2,
-        {column: 3, line: 9},
-        {column: 4, line: 10},
-        'at the end ${expression}',
-      );
-      assertBlock(
-        t3,
-        {column: 3, line: 11},
-        {column: 5, line: 12},
-        'mixed ${expression1} and ${expression2}',
-      );
+      assertBlock(t1, {column: 3, line: 8}, {column: 46, line: 8}, '${expression} up front');
+      assertBlock(t2, {column: 3, line: 9}, {column: 4, line: 10}, 'at the end ${expression}');
+      assertBlock(t3, {column: 3, line: 11}, {column: 5, line: 12}, 'mixed ${expression1} and ${expression2}');
     });
 
     test(`template literal with functions`, () => {
-      const dBlock = parseResult.describeBlocks.filter(
-        b => b.name === 'template literal with functions',
-      )[0];
+      const dBlock = parseResult.describeBlocks.filter(b => b.name === 'template literal with functions')[0];
       const t1 = dBlock.children[0];
       const e1 = t1.children[0];
 
@@ -295,15 +257,13 @@ function parserTests(parse: (file: string) => ParserResult) {
         t1,
         {column: 3, line: 16},
         {column: 5, line: 18},
-        'this ${test} calls ${JSON.stringfy(expression)} should still work',
+        'this ${test} calls ${JSON.stringfy(expression)} should still work'
       );
       assertBlock(e1, {column: 5, line: 17}, {column: 31, line: 17});
     });
 
     test(`multiline template literal`, () => {
-      const dBlock = parseResult.describeBlocks.filter(
-        b => b.name === 'multiline template literal',
-      )[0];
+      const dBlock = parseResult.describeBlocks.filter(b => b.name === 'multiline template literal')[0];
       const t1 = dBlock.children[0];
       const e1 = t1.children[0];
 
@@ -315,15 +275,13 @@ function parserTests(parse: (file: string) => ParserResult) {
         {column: 3, line: 22},
         {column: 5, line: 25},
         `this \${test} will span in
-    multiple lines`,
+    multiple lines`
       );
       assertBlock(e1, {column: 5, line: 24}, {column: 32, line: 24});
     });
 
     test(`edge case: should not fail`, () => {
-      const dBlock = parseResult.describeBlocks.filter(
-        b => b.name === 'edge case: should not fail',
-      )[0];
+      const dBlock = parseResult.describeBlocks.filter(b => b.name === 'edge case: should not fail')[0];
       const t1 = dBlock.children[0];
       const e1 = t1.children[0];
 
@@ -341,7 +299,7 @@ function parserTests(parse: (file: string) => ParserResult) {
     startLine: number,
     startCol: number,
     endLine: number,
-    endCol: number,
+    endCol: number
   ) => {
     expect(nBlock.name).toEqual(name);
     expect(nBlock.nameRange.start.line).toEqual(startLine);
@@ -372,7 +330,7 @@ function parserTests(parse: (file: string) => ParserResult) {
         22,
         7,
         23,
-        18,
+        18
       );
     });
   });

package.json

@@ -24,6 +24,7 @@
     "test": "jest",
     "flow": "flow",
     "lint": "eslint \"?(__mocks__|src|tests)/**/*.+(js|ts)\"",
+    "lint:fix": "eslint \"?(__mocks__|src|tests)/**/*.+(js|ts)\" --fix",
     "ci": "yarn type-check && yarn lint && yarn test --coverage && yarn flow",
     "prettier": "prettier --check \"?(__mocks__|src|tests)/**/*.+(js|ts)\"",
     "prettier-write": "prettier --write",
@@ -56,15 +57,16 @@
     "flow-bin": "^0.97.0",
     "jest": "^24.7.0",
     "lint-staged": "^8.1.5",
-    "prettier": "^1.17.0"
+    "prettier": "^1.17.0",
+    "typescript": "^3.8.2"
   },
   "dependencies": {
+    "@babel/parser": "^7.8.3",
     "@babel/traverse": "^7.6.2",
+    "@babel/types": "^7.8.3",
     "@jest/types": "^24.8.0",
-    "babylon": "^6.14.1",
     "core-js": "^3.2.1",
-    "jest-snapshot": "^24.7.0",
-    "typescript": "^3.4.3"
+    "jest-snapshot": "^24.7.0"
   },
   "jest": {
     "testPathIgnorePatterns": [

src/Runner.js

@@ -189,9 +189,7 @@ export default class Runner extends EventEmitter {
         // knowing this could leave orphan process...
         // eslint-disable-next-line no-console
         console.warn(
-          `failed to kill process group, this could leave some orphan process whose ppid=${
-            this.debugprocess.pid
-          }. error=`,
+          `failed to kill process group, this could leave some orphan process whose ppid=${this.debugprocess.pid}. error=`,
           e
         );
         this.debugprocess.kill();

src/Snapshot.js

@@ -12,7 +12,7 @@ import traverse from '@babel/traverse';
 import {buildSnapshotResolver, utils} from 'jest-snapshot';
 import type {ProjectConfig} from '../types/Config';
 
-import {getASTfor} from './parsers/babylon_parser';
+import {getASTfor} from './parsers/babel_parser';
 
 type Node = any;
 

src/__tests__/parsers/babylon_parser.test.js renamed to src/__tests__/parsers/babel_parser.test.js

@@ -7,7 +7,7 @@
  * @flow
  */
 
-const {parse} = require('../../parsers/babylon_parser');
+const {parseJs} = require('../../parsers/babel_parser');
 const {parserTests} = require('../../../fixtures/parser_tests');
 
-parserTests(parse);
+parserTests(parseJs);

src/__tests__/parsers/typescript_parser.test.js renamed to src/__tests__/parsers/babel_typescript_parser.test.js

@@ -5,7 +5,7 @@
  * LICENSE file in the root directory of this source tree.
  */
 
-import {parse} from '../../parsers/typescript_parser';
+import {parseTs} from '../../parsers/babel_parser';
 import {parserTests} from '../../../fixtures/parser_tests';
 
-parserTests(parse);
+parserTests(parseTs);

src/__tests__/parsers/index.test.js

@@ -6,37 +6,31 @@
  */
 
 import parse from '../../parsers';
-import {parse as js_parse} from '../../parsers/babylon_parser';
-import {parse as ts_parse} from '../../parsers/typescript_parser';
+import {parseJs, parseTs} from '../../parsers/babel_parser';
 
-jest.mock('../../parsers/babylon_parser', () => {
-  const mock_js_parse = jest.fn();
-  return {parse: mock_js_parse};
-});
-jest.mock('../../parsers/typescript_parser', () => {
-  const mock_ts_parse = jest.fn();
-  return {parse: mock_ts_parse};
+jest.mock('../../parsers/babel_parser', () => {
+  return {parseJs: jest.fn(), parseTs: jest.fn()};
 });
 
 describe('select parser', () => {
   beforeEach(() => {
     jest.clearAllMocks();
   });
-  it('for .js or .jsx file', () => {
-    const files = ['abc.js', 'abc.jsx'];
+  it('for .js or .jsx or .mjs file', () => {
+    const files = ['abc.js', 'abc.jsx', 'abc.mjs'];
     files.forEach(file => {
       parse(file, undefined, true);
-      expect(js_parse).toHaveBeenCalled();
-      expect(ts_parse).not.toHaveBeenCalled();
+      expect(parseJs).toHaveBeenCalled();
+      expect(parseTs).not.toHaveBeenCalled();
       jest.clearAllMocks();
     });
   });
   it('for .ts or .tsx file', () => {
     const files = ['abc.ts', 'abc.tsx'];
     files.forEach(file => {
       parse(file, undefined, true);
-      expect(js_parse).not.toHaveBeenCalled();
-      expect(ts_parse).toHaveBeenCalled();
+      expect(parseJs).not.toHaveBeenCalled();
+      expect(parseTs).toHaveBeenCalled();
       jest.clearAllMocks();
     });
   });
@@ -45,8 +39,8 @@ describe('select parser', () => {
       const files = ['abc', 'abc.ttsx'];
       files.forEach(file => {
         expect(() => parse(file, undefined, false)).not.toThrow();
-        expect(js_parse).toHaveBeenCalled();
-        expect(ts_parse).not.toHaveBeenCalled();
+        expect(parseJs).toHaveBeenCalled();
+        expect(parseTs).not.toHaveBeenCalled();
         jest.clearAllMocks();
       });
     });

src/__tests__/runner.test.js

@@ -429,6 +429,13 @@ describe('Runner', () => {
       expect(close).toBeCalled();
     });
 
+    it('emits debuggerProcessExit when process close', () => {
+      const close = jest.fn();
+      runner.on('debuggerProcessExit', close);
+      fakeProcess.emit('close');
+      expect(close).toBeCalled();
+    });
+
     it('should start jest process after killing the old process', () => {
       runner.closeProcess();
       runner.start();