feat: add support for jest 27

* Switches to use esbuild to generate dist and esbuild-jest for testing
* Switch from tslint to eslint
* Upgrades all deps.
* Many more.

BREAKING CHANGE: drop support for using @marko/jest as a preset which was deprecated (use @marko/preset/browser or @marko/preset/node)
BREAKING CHANGE: drop support node 12

.eslintignore

@@ -0,0 +1,5 @@
+.vscode
+node_modules
+coverage
+dist
+__snapshots__

.eslintrc.json

@@ -0,0 +1,31 @@
+{
+  "root": true,
+  "extends": ["eslint:recommended", "prettier"],
+  "parserOptions": {
+    "sourceType": "module",
+    "impliedStrict": true
+  },
+  "env": {
+    "jest": true,
+    "node": true,
+    "es2020": true,
+    "browser": true
+  },
+  "overrides": [
+    {
+      "files": ["**/*.ts"],
+      "parser": "@typescript-eslint/parser",
+      "extends": [
+        "eslint:recommended",
+        "plugin:@typescript-eslint/recommended",
+        "prettier"
+      ],
+      "rules": {
+        "@typescript-eslint/explicit-module-boundary-types": "off",
+        "@typescript-eslint/no-non-null-assertion": "off",
+        "@typescript-eslint/no-empty-function": "off",
+        "@typescript-eslint/no-explicit-any": "off"
+      }
+    }
+  ]
+}

.fixpackrc

@@ -0,0 +1,3 @@
+{
+  "quiet": true
+}

.github/workflows/ci.yml

@@ -0,0 +1,30 @@
+name: CI
+
+on:
+  pull_request:
+    paths-ignore: ["**.md"]
+  push:
+    branches: ["main"]
+    paths-ignore: ["**.md"]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        node: [14.x, 16.x]
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v2
+      - name: Use node@${{ matrix.node }}
+        uses: actions/setup-node@v2
+        with:
+          node-version: ${{ matrix.node }}
+      - name: Install dependencies
+        run: npm ci
+      - name: Lint code
+        run: npm run lint
+      - name: Run tests
+        run: npm run ci:test
+      - name: Report code coverage
+        run: npm run ci:report

.gitignore

@@ -10,12 +10,9 @@
 npm-debug.log
 
 # Build
-/transform
-/preset
+dist
+*.tsbuildinfo
 
 # Coverage
 coverage
 .nyc_output
-
-# Test
-*.actual.*

.husky/.gitignore

@@ -0,0 +1 @@
+_

.lintstagedrc.json

@@ -0,0 +1,4 @@
+{
+  "*.ts": ["eslint -f codeframe --fix", "prettier --write"],
+  "*{.js,.json,.md,.yml,rc}": ["prettier --write"]
+}

.prettierignore

@@ -1,10 +1,8 @@
 .vscode
-.nyc_output
 package.json
 package-lock.json
 CHANGELOG.md
 node_modules
 coverage
-/preset
-/transform
-*.actual.*
+dist
+__snapshots__

.prettierrc.json

@@ -0,0 +1,10 @@
+{
+  "overrides": [
+    {
+      "files": "*rc",
+      "options": {
+        "parser": "json"
+      }
+    }
+  ]
+}

LICENSE

@@ -1,6 +1,6 @@
 MIT License
 
-Copyright (c) 2018 eBay Inc. and contributors
+Copyright (c) 2021 eBay Inc. and contributors
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal

README.md

@@ -43,19 +43,20 @@ Templates are automatically compiled for the correct environment based on your J
 ```console
 npm install @marko/jest -D
 ```
+
 or
+
 ```console
 yarn add @marko/jest -D
 ```
 
-
 # Examples
 
 **jest.config.js**
 
 ```javascript
 module.exports = {
-  preset: "@marko/jest/preset/browser"
+  preset: "@marko/jest/preset/browser",
 };
 ```
 
@@ -86,8 +87,8 @@ Jest presets are extensible by default, meaning you should be able to continue t
 module.exports = {
   preset: "@marko/jest/preset/browser",
   transform: {
-    "\\.ts$": "ts-jest"
-  }
+    "\\.ts$": "ts-jest",
+  },
 };
 ```
 
@@ -96,11 +97,11 @@ You can also get access to the preset configuration manually by importing `@mark
 ```javascript
 const markoJest = require("@marko/jest/preset/browser/jest-preset");
 module.exports = {
-  transform: markoJest.transform,
-  transformIgnorePatterns: markoJest.transformIgnorePatterns,
   resolver: markoJest.resolver,
+  transform: markoJest.transform,
+  testEnvironment: markoJest.testEnvironment,
   moduleFileExtensions: markoJest.moduleFileExtensions,
-  browser: true
+  transformIgnorePatterns: markoJest.transformIgnorePatterns,
 };
 ```
 
@@ -116,14 +117,14 @@ module.exports = {
     {
       displayName: "browser",
       preset: "@marko/jest/preset/browser",
-      testMatch: ["**/__tests__/**/*.browser.js"]
+      testMatch: ["**/__tests__/**/*.browser.js"],
     },
     {
       displayName: "server",
       preset: "@marko/jest/preset/node",
-      testMatch: ["**/__tests__/**/*.server.js"]
-    }
-  ]
+      testMatch: ["**/__tests__/**/*.server.js"],
+    },
+  ],
 };
 ```
 

build.js

@@ -0,0 +1,24 @@
+const fs = require("fs");
+const glob = require("tiny-glob");
+const { build } = require("esbuild");
+
+(async () => {
+  await fs.promises.rmdir("dist", { recursive: true }).catch(() => {});
+
+  // Ideally we'd use the same bundling / codesplitting as esm for cjs,
+  // but thats not yet possible with esbuild, so we manually build each file.
+  // https://github.com/evanw/esbuild/issues/1341
+  await build({
+    format: "cjs",
+    outdir: "dist",
+    platform: "node",
+    target: ["node14"],
+    entryPoints: await glob("src/{preset,transform}/**/*.ts"),
+  });
+})().catch((err) => {
+  if (!err.errors) {
+    console.error(err);
+  }
+
+  process.exit(1);
+});

jest.config.js

@@ -1,24 +1,21 @@
-const base = {
+const common = {
   transform: {
-    "\\.ts$": "ts-jest",
-    "\\.css$": "jest-transform-css"
-  }
+    "\\.ts$": "esbuild-jest",
+    "\\.css$": "jest-transform-css",
+  },
 };
 
 module.exports = {
   projects: [
     {
-      ...base,
-      preset: "./preset/node/jest-preset.js",
-      displayName: "node",
-      testEnvironment: "node",
-      testMatch: ["<rootDir>/test/server.test.ts"]
+      ...common,
+      preset: "./src/preset/node/jest-preset.ts",
+      testMatch: ["<rootDir>/test/server.test.ts"],
     },
     {
-      ...base,
-      preset: "./preset/browser/jest-preset.js",
-      displayName: "browser",
-      testMatch: ["<rootDir>/test/browser.test.ts"]
-    }
-  ]
+      ...common,
+      preset: "./src/preset/browser/jest-preset.ts",
+      testMatch: ["<rootDir>/test/browser.test.ts"],
+    },
+  ],
 };