feat(babel-jest): wrap babel-jest to support conventions

lerna.json

@@ -40,6 +40,7 @@
     "packages/validation-i18n",
     "packages/web-components",
     "packages/webpack-loader",
+    "packages/babel-jest",
     "test/1kcomponents",
     "test/browserstack",
     "test/cypress",

package.json

@@ -49,6 +49,8 @@
   },
   "devDependencies": {
     "@commitlint/cli": "^8.2.0",
+    "@jest/transform": "^25.3.0",
+    "@jest/types": "^25.3.0",
     "@types/acorn": "^4.0.5",
     "@types/fancy-log": "^1.3.1",
     "@types/jsdom": "^12.2.4",
@@ -66,6 +68,7 @@
     "@types/webpack-env": "^1.14.1",
     "@typescript-eslint/eslint-plugin": "^2.12.0",
     "@typescript-eslint/parser": "^2.12.0",
+    "babel-jest": "^25.3.0",
     "chalk": "^3.0.0",
     "codecov": "^3.6.1",
     "command-exists": "^1.2.8",

packages/babel-jest/.eslintrc.js

@@ -0,0 +1,6 @@
+module.exports = {
+  extends: ['../../.eslintrc.js'],
+  rules: {
+    'import/no-nodejs-modules': 'off'
+  }
+};

packages/babel-jest/.npmrc

@@ -0,0 +1 @@
+package-lock=false

packages/babel-jest/CHANGELOG.md

@@ -0,0 +1 @@
+# Change Log

packages/babel-jest/LICENSE

@@ -0,0 +1,21 @@
+The MIT License (MIT)
+
+Copyright (c) 2010 - 2018 Blue Spire Inc.
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

packages/babel-jest/README.md

@@ -0,0 +1,47 @@
+[![License: MIT](https://img.shields.io/badge/License-MIT-yellow.svg)](https://opensource.org/licenses/MIT)
+[![lerna](https://img.shields.io/badge/maintained%20with-lerna-cc00ff.svg)](https://lernajs.io/)
+[![TypeScript](https://img.shields.io/badge/%3C%2F%3E-TypeScript-%230074c1.svg)](http://www.typescriptlang.org/)
+[![CircleCI](https://circleci.com/gh/aurelia/aurelia.svg?style=shield)](https://circleci.com/gh/aurelia/aurelia)
+[![Test Coverage](https://api.codeclimate.com/v1/badges/5ac0e13689735698073a/test_coverage)](https://codeclimate.com/github/aurelia/aurelia/test_coverage)
+[![npm](https://img.shields.io/npm/v/@aurelia/babel-jest.svg?maxAge=3600)](https://www.npmjs.com/package/@aurelia/babel-jest)
+# @aurelia/babel-jest
+
+## Installing
+
+For the latest stable version:
+
+```bash
+npm i -D @aurelia/babel-jest
+```
+
+For our nightly builds:
+
+```bash
+npm i -D @aurelia/babel-jest@dev
+```
+
+## Usage
+
+In `jest.config.js` or `package.json`:
+
+```js
+"transform": {
+  "^.+\\.js$": "@aurelia/babel-jest"
+}
+```
+
+Use ShadowDOM:
+
+```js
+"transform": {
+  "^.+\\.js$": ["@aurelia/babel-jest", { defaultShadowOptions: { mode: 'open' } }]
+}
+```
+
+Use CSS Modules:
+
+```js
+"transform": {
+  "^.+\\.js$": ["@aurelia/babel-jest", { useCSSModule: true }]
+}
+```

packages/babel-jest/package.json

@@ -0,0 +1,48 @@
+{
+  "name": "@aurelia/babel-jest",
+  "version": "0.6.0",
+  "main": "dist/esnext/index.js",
+  "module": "dist/esnext/index.js",
+  "types": "dist/index.d.ts",
+  "typings": "dist/index.d.ts",
+  "license": "MIT",
+  "homepage": "https://aurelia.io",
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/aurelia/aurelia"
+  },
+  "bugs": {
+    "url": "https://github.com/aurelia/aurelia/issues"
+  },
+  "keywords": [
+    "aurelia",
+    "jest"
+  ],
+  "files": [
+    "dist",
+    "src",
+    "README.md",
+    "CHANGELOG.md",
+    "LICENSE"
+  ],
+  "scripts": {
+    "lint": "eslint --cache --ext .js,.ts src/",
+    "build": "tsc -b",
+    "bundle": "ts-node -P ../../tsconfig.json ../../scripts/bundle.ts umd,esm,system babel-jest",
+    "dev": "tsc -b -w"
+  },
+  "publishConfig": {
+    "access": "public"
+  },
+  "dependencies": {
+    "@aurelia/plugin-conventions": "0.6.0",
+    "babel-jest": "^25.3.0"
+  },
+  "devDependencies": {
+    "@jest/transform": "^25.3.0",
+    "@jest/types": "^25.3.0",
+    "@types/node": "^12.12.21",
+    "tslib": "^1.10.0",
+    "typescript": "^3.7.4"
+  }
+}

packages/babel-jest/src/index.ts

@@ -0,0 +1,38 @@
+import { IOptionalPreprocessOptions, preprocess, preprocessOptions } from '@aurelia/plugin-conventions';
+import { createTransformer } from 'babel-jest';
+import type { Config } from '@jest/types';
+import type { TransformOptions, Transformer } from '@jest/transform';
+import * as path from 'path';
+
+const transformer = createTransformer();
+const { process } = transformer;
+
+function newProcess(
+  sourceText: string,
+  sourcePath: Config.Path,
+  config: Config.ProjectConfig,
+  transformOptions?: TransformOptions
+) {
+  try {
+    const allOptions = preprocessOptions((transformOptions as IOptionalPreprocessOptions) || {});
+    const result = preprocess(
+      { path: sourcePath, contents: sourceText },
+      allOptions
+    );
+    let newSourcePath = sourcePath;
+    if (result !== undefined) {
+      if (allOptions.templateExtensions.includes(path.extname(sourcePath))) {
+        // Rewrite foo.html to foo.html.js, or foo.md to foo.md.js
+        newSourcePath += '.js';
+      }
+      // TODO: to check. This might have complication on jest caches.
+      return process(result.code, newSourcePath, config, transformOptions);
+    }
+  } catch (e) {
+    // ignore
+  }
+  return process(sourceText, sourcePath, config, transformOptions);
+}
+
+transformer.process = newProcess;
+export = transformer;

packages/babel-jest/tsconfig.json

@@ -0,0 +1,9 @@
+{
+  "extends": "../tsconfig-build.json",
+  "compilerOptions": {
+    "rootDir": "src",
+    "declarationDir": "dist",
+    "outDir": "dist/esnext"
+  },
+  "include": ["src"]
+}

packages/tsconfig.json

@@ -33,6 +33,7 @@
     { "path": "testing" },
     { "path": "validation" },
     { "path": "web-components" },
-    { "path": "webpack-loader" }
+    { "path": "webpack-loader" },
+    { "path": "babel-jest" }
   ]
 }