[Tests] test plugin in flat configs

.eslintrc

@@ -16,6 +16,7 @@
 	"ignorePatterns": [
 		"coverage/",
 		".nyc_output/",
+    "tests/fixtures/flat-config/"
 	],
 	"rules": {
 		"comma-dangle": [2, "always-multiline"],

package.json

@@ -15,7 +15,7 @@
     "test": "npm run unit-test",
     "posttest": "aud --production",
     "type-check": "tsc",
-    "unit-test": "istanbul cover node_modules/mocha/bin/_mocha tests/lib/**/*.js tests/util/**/*.js tests/index.js",
+    "unit-test": "istanbul cover node_modules/mocha/bin/_mocha tests/lib/**/*.js tests/util/**/*.js tests/index.js tests/flat-config.js",
     "update:eslint-docs": "eslint-doc-generator"
   },
   "repository": {

tests/fixtures/flat-config/config-all/eslint.config.js

@@ -0,0 +1,11 @@
+'use strict';
+
+const reactAll = require('../../../../configs/all.js');
+
+module.exports = [{
+  files: ['**/*.jsx'],
+  ...reactAll,
+  languageOptions: {
+    ...reactAll.languageOptions
+  }
+}];

tests/fixtures/flat-config/config-all/test.jsx

@@ -0,0 +1,3 @@
+<div foo="hello">
+    test
+</div>

tests/fixtures/flat-config/config-jsx-runtime/eslint.config.js

@@ -0,0 +1,15 @@
+'use strict';
+
+const reactRecommended = require('../../../../configs/recommended.js');
+const reactJSXRuntime = require('../../../../configs/jsx-runtime.js');
+
+module.exports = [
+  {
+    files: ['**/*.jsx'],
+    ...reactRecommended,
+    languageOptions: {
+      ...reactRecommended.languageOptions
+    }
+  },
+  reactJSXRuntime
+];

tests/fixtures/flat-config/config-jsx-runtime/test.jsx

@@ -0,0 +1,3 @@
+<div foo="hello">
+    test
+</div>

tests/fixtures/flat-config/config-recommended/eslint.config.js

@@ -0,0 +1,11 @@
+'use strict';
+
+const reactRecommended = require('../../../../configs/recommended.js');
+
+module.exports = [{
+  files: ['**/*.jsx'],
+  ...reactRecommended,
+  languageOptions: {
+    ...reactRecommended.languageOptions
+  }
+}];

tests/fixtures/flat-config/config-recommended/test.jsx

@@ -0,0 +1,3 @@
+<div foo="hello">
+    test
+</div>

tests/fixtures/flat-config/plugin-and-config/eslint.config.js

@@ -0,0 +1,18 @@
+'use strict';
+
+const react = require('../../../..');
+const reactRecommended = require('../../../../configs/recommended.js');
+
+module.exports = [
+  {
+    files: ['**/*.jsx'],
+    plugins: { react }
+  },
+  {
+    files: ['**/*.jsx'],
+    ...reactRecommended,
+    languageOptions: {
+      ...reactRecommended.languageOptions
+    }
+  }
+];

tests/fixtures/flat-config/plugin-and-config/test.jsx

@@ -0,0 +1,3 @@
+<div foo="hello">
+    test
+</div>

tests/fixtures/flat-config/plugin/eslint.config.js

@@ -0,0 +1,20 @@
+'use strict';
+
+const react = require('../../../..');
+
+module.exports = [{
+  files: ['**/*.jsx'],
+  languageOptions: {
+    parserOptions: {
+      ecmaFeatures: {
+        jsx: true,
+      },
+    },
+  },
+  plugins: {
+    react,
+  },
+  rules: {
+    'react/jsx-no-literals': 1,
+  },
+}];

tests/fixtures/flat-config/plugin/test.jsx

@@ -0,0 +1,3 @@
+<div foo="hello">
+    test
+</div>

tests/flat-config.js

@@ -0,0 +1,109 @@
+/* eslint-env mocha */
+
+'use strict';
+
+const semver = require('semver');
+const eslintPkg = require('eslint/package.json');
+
+if (!semver.satisfies(eslintPkg.version, '>= 8.57.0')) {
+  return;
+}
+
+const ESLint = semver.major(eslintPkg.version) < 9
+  ? require('eslint/use-at-your-own-risk').FlatESLint // eslint-disable-line import/no-unresolved -- false positive
+  : require('eslint').ESLint;
+
+const path = require('path');
+const assert = require('assert');
+
+describe('eslint-plugin-react in flat config', () => {
+  const fixturesdDir = path.resolve(__dirname, 'fixtures', 'flat-config');
+
+  it('should work when the plugin is used directly', () => {
+    const eslint = new ESLint({
+      cwd: path.resolve(fixturesdDir, 'plugin'),
+    });
+
+    return eslint.lintFiles(['test.jsx']).then((results) => {
+      const result = results[0];
+
+      assert.strictEqual(result.messages.length, 1);
+      assert.strictEqual(result.messages[0].severity, 1);
+      assert.strictEqual(result.messages[0].ruleId, 'react/jsx-no-literals');
+      assert.strictEqual(result.messages[0].messageId, 'literalNotInJSXExpression');
+    });
+  });
+
+  it('should work when the plugin is used with "all" config', () => {
+    const eslint = new ESLint({
+      cwd: path.resolve(fixturesdDir, 'config-all'),
+    });
+
+    return eslint.lintFiles(['test.jsx']).then((results) => {
+      const result = results[0];
+
+      assert.strictEqual(result.messages.length, 3);
+      assert.strictEqual(result.messages[0].severity, 2);
+      assert.strictEqual(result.messages[0].ruleId, 'react/react-in-jsx-scope');
+      assert.strictEqual(result.messages[0].messageId, 'notInScope');
+      assert.strictEqual(result.messages[1].severity, 2);
+      assert.strictEqual(result.messages[1].ruleId, 'react/no-unknown-property');
+      assert.strictEqual(result.messages[1].messageId, 'unknownProp');
+      assert.strictEqual(result.messages[2].severity, 2);
+      assert.strictEqual(result.messages[2].ruleId, 'react/jsx-no-literals');
+      assert.strictEqual(result.messages[2].messageId, 'literalNotInJSXExpression');
+    });
+  });
+
+  it('should work when the plugin is used with "recommended" config', () => {
+    const eslint = new ESLint({
+      cwd: path.resolve(fixturesdDir, 'config-recommended'),
+    });
+
+    return eslint.lintFiles(['test.jsx']).then((results) => {
+      const result = results[0];
+
+      assert.strictEqual(result.messages.length, 2);
+      assert.strictEqual(result.messages[0].severity, 2);
+      assert.strictEqual(result.messages[0].ruleId, 'react/react-in-jsx-scope');
+      assert.strictEqual(result.messages[0].messageId, 'notInScope');
+      assert.strictEqual(result.messages[1].severity, 2);
+      assert.strictEqual(result.messages[1].ruleId, 'react/no-unknown-property');
+      assert.strictEqual(result.messages[1].messageId, 'unknownProp');
+    });
+  });
+
+  it('should work when the plugin is used with "recommended" and "jsx-runtime" configs', () => {
+    const eslint = new ESLint({
+      cwd: path.resolve(fixturesdDir, 'config-jsx-runtime'),
+    });
+
+    return eslint.lintFiles(['test.jsx']).then((results) => {
+      const result = results[0];
+
+      assert.strictEqual(result.messages.length, 1);
+      assert.strictEqual(result.messages[0].severity, 2);
+      assert.strictEqual(result.messages[0].ruleId, 'react/no-unknown-property');
+      assert.strictEqual(result.messages[0].messageId, 'unknownProp');
+    });
+  });
+
+  // https://github.com/jsx-eslint/eslint-plugin-react/issues/3693
+  it('should work when the plugin is used directly and with "recommended" config', () => {
+    const eslint = new ESLint({
+      cwd: path.resolve(fixturesdDir, 'plugin-and-config'),
+    });
+
+    return eslint.lintFiles(['test.jsx']).then((results) => {
+      const result = results[0];
+
+      assert.strictEqual(result.messages.length, 2);
+      assert.strictEqual(result.messages[0].severity, 2);
+      assert.strictEqual(result.messages[0].ruleId, 'react/react-in-jsx-scope');
+      assert.strictEqual(result.messages[0].messageId, 'notInScope');
+      assert.strictEqual(result.messages[1].severity, 2);
+      assert.strictEqual(result.messages[1].ruleId, 'react/no-unknown-property');
+      assert.strictEqual(result.messages[1].messageId, 'unknownProp');
+    });
+  });
+});