[Tests] test on the new babel eslint parser

Author: ljharb

CHANGELOG.md

@@ -19,6 +19,10 @@ This change log adheres to standards from [Keep a CHANGELOG](http://keepachangel
 * [`no-unstable-components`]: improve handling of objects containing render function properties ([#3111] @fizwidget)
 * [`prop-types`], `propTypes`: add forwardRef<>, ForwardRefRenderFunction<> prop-types ([#3112] @vedadeepta)
 
+### Changed
+* [Tests] test on the new babel eslint parser ([#3113] @ljharb)
+
+[#3113]: https://github.com/yannickcr/eslint-plugin-react/pull/3113
 [#3112]: https://github.com/yannickcr/eslint-plugin-react/pull/3112
 [#3111]: https://github.com/yannickcr/eslint-plugin-react/pull/3111
 [#3110]: https://github.com/yannickcr/eslint-plugin-react/pull/3110

package.json

@@ -44,6 +44,12 @@
     "string.prototype.matchall": "^4.0.6"
   },
   "devDependencies": {
+    "@babel/core": "^7.15.8",
+    "@babel/eslint-parser": "^7.15.8",
+    "@babel/plugin-syntax-decorators": "^7.14.5",
+    "@babel/plugin-syntax-do-expressions": "^7.14.5",
+    "@babel/plugin-syntax-function-bind": "^7.14.5",
+    "@babel/preset-react": "^7.14.5",
     "@types/eslint": "=7.2.10",
     "@types/estree": "^0.0.50",
     "@types/node": "^14.17.27",

tests/helpers/parsers.js

@@ -9,8 +9,33 @@ const NODE_MODULES = '../../node_modules';
 
 const parsers = {
   BABEL_ESLINT: path.join(__dirname, NODE_MODULES, 'babel-eslint'),
+  '@BABEL_ESLINT': path.join(__dirname, NODE_MODULES, '@babel/eslint-parser'),
   TYPESCRIPT_ESLINT: path.join(__dirname, NODE_MODULES, 'typescript-eslint-parser'),
   '@TYPESCRIPT_ESLINT': path.join(__dirname, NODE_MODULES, '@typescript-eslint/parser'),
+  babelParserOptions: function parserOptions(test, features) {
+    return Object.assign({}, test.parserOptions, {
+      requireConfigFile: false,
+      babelOptions: {
+        presets: [
+          '@babel/preset-react',
+        ],
+        plugins: [
+          '@babel/plugin-syntax-do-expressions',
+          '@babel/plugin-syntax-function-bind',
+          ['@babel/plugin-syntax-decorators', { legacy: true }],
+        ],
+      },
+      ecmaFeatures: Object.assign(
+        {},
+        test.parserOptions && test.parserOptions.ecmaFeatures,
+        {
+          jsx: true,
+          modules: true,
+          legacyDecorators: features.has('decorators'),
+        }
+      ),
+    });
+  },
   all: function all(tests) {
     const t = flatMap(tests, (test) => {
       if (typeof test === 'string') {
@@ -25,7 +50,7 @@ const parsers = {
       const es = test.parserOptions && test.parserOptions.ecmaVersion;
 
       function addComment(testObject, parser) {
-        const extraComment = `\n// features: [${Array.from(features).join(',')}], parser: ${parser}`;
+        const extraComment = `\n// features: [${Array.from(features).join(',')}], parser: ${parser}, parserOptions: ${testObject.parserOptions}`;
         return Object.assign(
           {},
           testObject,
@@ -46,9 +71,16 @@ const parsers = {
         || (features.has('fragment') && semver.satisfies(version, '< 5'));
 
       const skipBabel = features.has('no-babel');
-      const skipTS = semver.satisfies(version, '< 5')
+      const skipOldBabel = skipBabel || semver.satisfies(version, '>= 8');
+      const skipNewBabel = skipBabel
+        || features.has('no-babel-new')
+        || !semver.satisfies(version, '^7.5.0') // require('@babel/eslint-parser/package.json').peerDependencies.eslint
         || features.has('flow')
+        || features.has('types')
+        || features.has('ts');
+      const skipTS = semver.satisfies(version, '< 5')
         || features.has('no-ts')
+        || features.has('flow')
         || features.has('jsx namespace')
         || features.has('bind operator')
         || features.has('do expressions');
@@ -57,7 +89,11 @@ const parsers = {
 
       return [].concat(
         skipBase ? [] : addComment(test, 'default'),
-        skipBabel ? [] : addComment(Object.assign({}, test, { parser: parsers.BABEL_ESLINT }), 'babel-eslint'),
+        skipOldBabel ? [] : addComment(Object.assign({}, test, { parser: parsers.BABEL_ESLINT }), 'babel-eslint'),
+        skipNewBabel ? [] : addComment(Object.assign({}, test, {
+          parser: parsers['@BABEL_ESLINT'],
+          parserOptions: parsers.babelParserOptions(test, features),
+        }), '@babel/eslint-parser'),
         tsOld ? addComment(Object.assign({}, test, { parser: parsers.TYPESCRIPT_ESLINT }), 'typescript-eslint') : [],
         tsNew ? addComment(Object.assign({}, test, { parser: parsers['@TYPESCRIPT_ESLINT'] }), '@typescript/eslint') : []
       );

tests/lib/rules/jsx-curly-brace-presence.js

@@ -441,7 +441,7 @@ ruleTester.run('jsx-curly-brace-presence', rule, {
     ] : [])
   )),
 
-  invalid: parsers.all([
+  invalid: parsers.all([].concat(
     {
       code: '<App prop={`foo`} />',
       output: '<App prop="foo" />',
@@ -561,10 +561,45 @@ ruleTester.run('jsx-curly-brace-presence', rule, {
           {'some-complicated-exp'}
         </MyComponent>
       `,
-      features: ['no-default', 'no-ts-new'], // TODO: FIXME: remove no-default and no-ts-new and fix
+      features: ['no-default', 'no-ts-new', 'no-babel-new'], // TODO: FIXME: remove no-default and no-ts-new and fix
       options: [{ children: 'never' }],
-      errors: [{ messageId: 'unnecessaryCurly' }, { messageId: 'unnecessaryCurly' }],
+      errors: [
+        { messageId: 'unnecessaryCurly', line: 3 },
+        { messageId: 'unnecessaryCurly', line: 5 },
+      ],
     },
+    semver.satisfies(eslintPkg.version, '^7.5.0') ? { // require('@babel/eslint-parser/package.json').peerDependencies.eslint
+      // TODO: figure out how to make all other parsers work this well
+      code: `
+        <MyComponent>
+          {'foo'}
+          <div>
+            {'bar'}
+          </div>
+          {'baz'}
+          {'some-complicated-exp'}
+        </MyComponent>
+      `,
+      output: `
+        <MyComponent>
+          foo
+          <div>
+            bar
+          </div>
+          baz
+          some-complicated-exp
+        </MyComponent>
+      `,
+      parser: parsers['@BABEL_ESLINT'],
+      parserOptions: parsers.babelParserOptions({}, new Set()),
+      options: [{ children: 'never' }],
+      errors: [
+        { messageId: 'unnecessaryCurly', line: 3 },
+        { messageId: 'unnecessaryCurly', line: 5 },
+        { messageId: 'unnecessaryCurly', line: 7 },
+        { messageId: 'unnecessaryCurly', line: 8 },
+      ],
+    } : [],
     {
       code: `<MyComponent prop='bar'>foo</MyComponent>`,
       output: '<MyComponent prop={"bar"}>foo</MyComponent>',
@@ -854,6 +889,6 @@ ruleTester.run('jsx-curly-brace-presence', rule, {
       output: '<MyComponent prop="< style: true >">foo</MyComponent>',
       errors: [{ messageId: 'unnecessaryCurly' }],
       options: ['never'],
-    },
-  ]),
+    }
+  )),
 });

tests/lib/rules/no-unused-prop-types.js

@@ -3227,7 +3227,7 @@ ruleTester.run('no-unused-prop-types', rule, {
           }
         }
       `,
-      features: ['class fields'],
+      features: ['class fields', 'types'],
     },
     {
       code: `