feat: fl infra frontendTesting

boilerplate/skeleton/extension/.github/workflows/frontend.yml

@@ -9,6 +9,7 @@ jobs:
       enable_bundlewatch: <%= modules.bundlewatch %>
       enable_prettier: <%= modules.prettier %>
       enable_typescript: <%= modules.typescript %>
+      enable_tests: <%= modules.frontendTesting %>
 
       frontend_directory: <%= params.frontendDirectory %>
       backend_directory: <%= params.backendDirectory %>

boilerplate/skeleton/extension/js/jest.config.cjs

@@ -0,0 +1 @@
+module.exports = require('@flarum/jest-config')({});

boilerplate/skeleton/extension/js/package.json

@@ -1,11 +1,13 @@
 {
   "name": "@<%= params.packageName %>",
   "private": true,
+  "type": "module",
   "version": "0.0.0",
   "prettier": "@flarum/prettier-config",
   "dependencies": {
   },
   "devDependencies": {
+    "@flarum/jest-config": "^2.0.0",
     "@flarum/prettier-config": "^1.0.0",
     "flarum-tsconfig": "^1.0.2",
     "flarum-webpack-config": "^3.0.0",
@@ -25,6 +27,7 @@
     "build-typings": "<%= params.jsPackageManager %> run clean-typings && ([ -e src/@types ] && cp -r src/@types dist-typings/@types || true) && tsc && <%= params.jsPackageManager %> run post-build-typings",
     "post-build-typings": "find dist-typings -type f -name '*.d.ts' -print0 | xargs -0 sed -i 's,../src/@types,@types,g'",
     "check-typings": "tsc --noEmit --emitDeclarationOnly false",
-    "check-typings-coverage": "typescript-coverage-report"
+    "check-typings-coverage": "typescript-coverage-report",
+    "test": "yarn node --experimental-vm-modules $(yarn bin jest)"
   }
 }

boilerplate/skeleton/extension/js/tsconfig.test.json

@@ -0,0 +1,10 @@
+{
+    "extends": "./tsconfig.json",
+    "include": ["tests/**/*"],
+    "files": ["../../../node_modules/@flarum/jest-config/shims.d.ts"],
+    "compilerOptions": {
+        "strict": false,
+        "noImplicitReturns": false,
+        "noImplicitAny": false
+    }
+}

src/steps/gen-ext-scaffolder.ts

@@ -271,6 +271,7 @@ export const EXTENSION_MODULES = [
   'prettier',
   'typescript',
   'bundlewatch',
+  'frontendTesting',
 
   'backendTesting',
   'phpstan',
@@ -605,6 +606,34 @@ function moduleNameToDef(name: ExtensionModules): Module<ExtensionModules> {
         },
       };
 
+    case 'frontendTesting':
+      return {
+        name,
+        updatable: true,
+        togglable: true,
+        defaultEnabled: true,
+        shortDescription: 'Frontend testing via Jest and Mithril Query.',
+        dependsOn: ['js'],
+        filesToReplace: [
+          'js/jest.config.cjs',
+          'js/tsconfig.test.json',
+          'js/webpack.config.cjs',
+          'js/tests/unit/.gitkeep',
+          'js/tests/integration/.gitkeep',
+        ],
+        jsonToAugment: {
+          'js/package.json': [
+            'devDependencies.@flarum/jest-config',
+            'scripts.test',
+            'type',
+          ],
+        },
+        needsTemplateParams: [],
+        inferEnabled: async (_fs, paths: Paths) => {
+          return existsSync(paths.package('js/jest.config.cjs'));
+        },
+      };
+
     case 'backendTesting':
       return {
         name,