add e2e tests

.github/workflows/ci.yml

@@ -31,3 +31,38 @@ jobs:
         with:
           fail_ci_if_error: true
           token: ${{ secrets.CODECOV_TOKEN }}
+  e2e-legacy-config:
+    name: E2E Legacy Config
+    runs-on: ubuntu-latest
+    steps:
+      - uses: tatethurston/github-actions/build@main
+      - name: pnpm eslint
+        run: |
+          cd packages/legacy-config
+          output=$(pnpm eslint index.jsx || true)
+          echo "$output"
+
+          expected="Class component should be written as a function  react-prefer-function-component/react-prefer-function-component"
+          if [[ "$output" != *"$expected"* ]]; then
+            echo "❌ Fail"
+          else
+            echo "✅ Pass"
+          fi
+  e2e-flat-config:
+    name: E2E Flat Config
+    runs-on: ubuntu-latest
+    steps:
+      - uses: tatethurston/github-actions/build@main
+      - name: pnpm eslint
+        run: |
+          cd packages/flat-config
+          output=$(pnpm eslint index.jsx || true)
+          echo "$output"
+
+          expected="Class component should be written as a function  react-prefer-function-component/react-prefer-function-component"
+          if [[ "$output" != *"$expected"* ]]; then
+            echo "❌ Fail"
+            # exit 1
+          else
+            echo "✅ Pass"
+          fi

jest.config.mjs

@@ -0,0 +1,15 @@
+/** @type {import('jest').Config} */
+export default {
+  clearMocks: true,
+  coverageDirectory: "coverage",
+  testEnvironment: "node",
+  // TS ESM imports are referenced with .js extensions, but jest will fail to find
+  // the uncompiled file because it ends with .ts and is looking for .js.
+  moduleNameMapper: {
+    "(.+)\\.jsx?": "$1",
+    "(.+)\\.mjs": "$1.mts",
+  },
+  transform: {
+    "^.+\\.(ts|tsx|js|jsx|mjs|mts)$": "babel-jest",
+  },
+};

packages/flat-config/eslint.config.js

@@ -0,0 +1,17 @@
+import preferFunctionComponent from "eslint-plugin-react-prefer-function-component/config";
+
+export default [
+  {
+    files: ["*.jsx"],
+    languageOptions: {
+      parserOptions: {
+        ecmaVersion: "latest",
+        sourceType: "module",
+        ecmaFeatures: {
+          jsx: true,
+        },
+      },
+    },
+  },
+  preferFunctionComponent.configs.recommended,
+];

packages/flat-config/index.jsx

@@ -0,0 +1,7 @@
+import { Component } from "react";
+
+export class Foo extends Component {
+  render() {
+    return <div>{this.props.foo}</div>;
+  }
+}

packages/flat-config/package.json

@@ -0,0 +1,17 @@
+{
+  "name": "flat-config",
+  "type": "module",
+  "version": "1.0.0",
+  "description": "",
+  "main": "index.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "keywords": [],
+  "author": "",
+  "license": "ISC",
+  "devDependencies": {
+    "eslint": "^9.22.0",
+    "eslint-plugin-react-prefer-function-component": "workspace:^"
+  }
+}

packages/legacy-config/.eslintrc.js

@@ -0,0 +1,11 @@
+// eslint-disable-next-line no-undef
+module.exports = {
+  parserOptions: {
+    ecmaVersion: "latest",
+    sourceType: "module",
+    ecmaFeatures: {
+      jsx: true,
+    },
+  },
+  extends: ["plugin:react-prefer-function-component/recommended"],
+};

packages/legacy-config/index.jsx

@@ -0,0 +1,7 @@
+import { Component } from "react";
+
+export class Foo extends Component {
+  render() {
+    return <div>{this.props.foo}</div>;
+  }
+}