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feat: jest-environment-wrangler (#715)
A starting point for a jest environment powered by wrangler. This is just a proxy for `jest-environment-miniflare` right now, but we'll add features as we go along.
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‎.changeset/config.json

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"access": "public",
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"baseBranch": "main",
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"updateInternalDependencies": "patch",
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"ignore": []
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"ignore": [],
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"fixed": [["wrangler", "jest-environment-wrangler"]]
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}

‎.changeset/poor-hotels-drum.md

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---
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"jest-environment-wrangler": patch
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---
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feat: `jest-environment-wrangler`
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A starting point for a jest environment powered by wrangler. This is just a proxy for `jest-environment-miniflare` right now, but we'll add features as we go along.

‎.prettierignore

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packages/wrangler/vendor/
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packages/wrangler/wrangler-dist/
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packages/wrangler/miniflare-dist/
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packages/wrangler/CHANGELOG.md
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packages/example-worker-app/dist/
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packages/example-remix-pages-app/build
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packages/example-remix-pages-app/public/
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packages/prerelease-registry/_worker.js
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packages/wrangler/CHANGELOG.md
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packages/jest-environment-wrangler/dist/
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‎package-lock.json

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‎package.json

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"check:type": "npm run check:type --workspaces --if-present",
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"check:lint": "eslint \"packages/**/*.[tj]s?(x)\" --cache --cache-strategy content --max-warnings=0",
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"check:format": "prettier packages/** .changeset docs --check --ignore-unknown",
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"build": "npm run build --workspace=wrangler",
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"build": "npm run build --workspace=wrangler --workspace=jest-environment-wrangler",
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"test": "npm run test --workspaces --if-present",
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"prettify": "prettier packages/** --write --ignore-unknown"
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},
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"packages/wrangler/*-dist",
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"packages/wrangler/pages/functions/template-worker.ts",
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"packages/wrangler/templates",
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"example-remix-pages-app/public"
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"example-remix-pages-app/public",
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"packages/jest-environment-wrangler/dist"
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],
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"parser": "@typescript-eslint/parser",
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"parserOptions": {

‎packages/example-worker-app/package.json

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"name": "example-worker-app",
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"version": "1.0.0",
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"description": "",
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"main": "index.js",
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"scripts": {},
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"main": "src/index.js",
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"scripts": {
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"test": "npx jest"
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},
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"author": "",
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"license": "ISC",
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"private": true
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"private": true,
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"jest": {
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"testRegex": ".*.test\\.[jt]sx?$",
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"testEnvironment": "wrangler"
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}
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}

‎packages/example-worker-app/tests/index.test.js

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it("should run", () => {
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console.log(Request);
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});

‎packages/jest-environment-wrangler/.gitignore

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# Logs
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logs
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*.log
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npm-debug.log*
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yarn-debug.log*
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yarn-error.log*
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lerna-debug.log*
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.pnpm-debug.log*
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# Diagnostic reports (https://nodejs.org/api/report.html)
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report.[0-9]*.[0-9]*.[0-9]*.[0-9]*.json
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# Runtime data
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pids
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*.pid
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*.seed
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*.pid.lock
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# Directory for instrumented libs generated by jscoverage/JSCover
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lib-cov
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# Coverage directory used by tools like istanbul
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coverage
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*.lcov
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# nyc test coverage
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.nyc_output
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# Grunt intermediate storage (https://gruntjs.com/creating-plugins#storing-task-files)
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.grunt
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# Bower dependency directory (https://bower.io/)
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bower_components
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# node-waf configuration
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.lock-wscript
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# Compiled binary addons (https://nodejs.org/api/addons.html)
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build/Release
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# Dependency directories
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node_modules/
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jspm_packages/
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# Snowpack dependency directory (https://snowpack.dev/)
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web_modules/
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# TypeScript cache
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*.tsbuildinfo
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# Optional npm cache directory
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.npm
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# Optional eslint cache
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.eslintcache
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# Optional stylelint cache
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.stylelintcache
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# Microbundle cache
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.rpt2_cache/
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.rts2_cache_cjs/
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.rts2_cache_es/
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.rts2_cache_umd/
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# Optional REPL history
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.node_repl_history
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# Output of 'npm pack'
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*.tgz
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# Yarn Integrity file
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.yarn-integrity
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# dotenv environment variable files
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.env
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.env.development.local
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.env.test.local
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.env.production.local
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.env.local
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# parcel-bundler cache (https://parceljs.org/)
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.cache
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.parcel-cache
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# Next.js build output
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.next
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out
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# Nuxt.js build / generate output
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.nuxt
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dist
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# Gatsby files
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.cache/
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# Comment in the public line in if your project uses Gatsby and not Next.js
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# https://nextjs.org/blog/next-9-1#public-directory-support
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# public
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# vuepress build output
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.vuepress/dist
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# vuepress v2.x temp and cache directory
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.temp
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.cache
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# Docusaurus cache and generated files
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.docusaurus
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# Serverless directories
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.serverless/
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# FuseBox cache
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.fusebox/
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# DynamoDB Local files
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.dynamodb/
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# TernJS port file
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.tern-port
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# Stores VSCode versions used for testing VSCode extensions
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.vscode-test
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# yarn v2
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.yarn/cache
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.yarn/unplugged
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.yarn/build-state.yml
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.yarn/install-state.gz
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.pnp.*
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dist

‎packages/jest-environment-wrangler/README.md

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## EXPERIMENTAL jest-environment-wrangler
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A jest environment for Cloudflare Workers, powered by wrangler.
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```
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// jest.setup.js
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export default {
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testEnvironment: "wrangler"
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}
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```

‎packages/jest-environment-wrangler/package.json

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{
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"name": "jest-environment-wrangler",
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"version": "0.0.23",
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"description": "A jest environment for Cloudflare Workers, powered by wrangler.",
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"main": "dist/index.js",
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"scripts": {
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"build": "esbuild src/index.ts --outfile=dist/index.js --target=es2020 --sourcemap --platform=node --format=cjs",
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"check:type": "tsc"
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},
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"prepublishOnly": "npm run build",
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"keywords": [
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"jest",
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"wrangler",
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"cloudflare",
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"cloudflare-workers"
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],
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"author": "[email protected]",
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"license": "ISC",
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"dependencies": {
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"jest-environment-miniflare": "2.3.0",
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"wrangler": "0.0.23"
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}
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}

‎packages/jest-environment-wrangler/src/index.ts

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import MiniflareEnvironment from "jest-environment-miniflare";
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export default class WranglerEnvironment extends MiniflareEnvironment {}

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