Add tests and automated publishing the package to NPM (#96)

* Add Jest tests

* Address comments by Joel Denning

* Add more tests

* Fix setDocumentAndLoadScript

* Add tests for external maps

* Add automated release workflow

* Adapt changeset config

* Fix access for changeset config

* Address comments

* Revert addition of an empty line

* Revert fix on build error

---------

Co-authored-by: Roberto Mosca <roberto.mosca@gmail.com>

.changeset/README.md

@@ -0,0 +1,8 @@
+# Changesets
+
+Hello and welcome! This folder has been automatically generated by `@changesets/cli`, a build tool that works
+with multi-package repos, or single-package repos to help you version and publish your code. You can
+find the full documentation for it [in our repository](https://github.com/changesets/changesets)
+
+We have a quick list of common questions to get you started engaging with this project in
+[our documentation](https://github.com/changesets/changesets/blob/main/docs/common-questions.md)

.changeset/config.json

@@ -0,0 +1,14 @@
+{
+  "$schema": "https://unpkg.com/@changesets/config@2.3.1/schema.json",
+  "changelog": [
+    "@changesets/changelog-github",
+    { "repo": "single-spa/import-map-overrides" }
+  ],
+  "commit": false,
+  "fixed": [],
+  "linked": [],
+  "access": "public",
+  "baseBranch": "origin/main",
+  "updateInternalDependencies": "patch",
+  "ignore": []
+}

.changeset/fast-chairs-guess.md

@@ -0,0 +1,5 @@
+---
+"import-map-overrides": patch
+---
+
+Add tests on API and automate release flow

.github/workflows/build-test-release.yml

@@ -0,0 +1,83 @@
+name: Build, Test, Release
+
+on:
+  push:
+    branches: main
+  pull_request:
+    branches: "*"
+
+jobs:
+  build_lint_test:
+    name: Build, Lint, and Test
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout Repo
+        uses: actions/checkout@v3
+        with:
+          # check out full history
+          fetch-depth: 0
+
+      - name: Install Pnpm
+        uses: pnpm/action-setup@v2.0.1
+        with:
+          version: 8.8.0
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v3
+        with:
+          node-version: 18.x
+          cache: pnpm
+
+      - name: Install dependencies
+        run: pnpm install --frozen-lockfile
+
+      - name: Validate
+        run: |
+          pnpm run lint
+          pnpm run check-format
+          pnpm exec changeset status --since=origin/main
+
+      - name: Test
+        run: pnpm run test
+
+      - name: Build
+        run: pnpm run build
+
+  release:
+    name: Release
+    needs: build_lint_test
+    permissions:
+      contents: write # To push release tags
+      pull-requests: write # To create release pull requests
+    runs-on: ubuntu-latest
+    if: ${{ github.ref == 'refs/heads/main' }}
+    steps:
+      - name: Checkout Repo
+        uses: actions/checkout@v3
+
+      - name: Install Pnpm
+        uses: pnpm/action-setup@v2.0.1
+        with:
+          version: 8.8.0
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v3
+        with:
+          node-version: 18.x
+          cache: pnpm
+
+      - name: Install dependencies
+        run: pnpm install --frozen-lockfile
+
+      - name: Build
+        run: pnpm run build
+
+      - name: Create Release Pull Request or Publish to NPM
+        id: changesets
+        uses: changesets/action@v1
+        with:
+          publish: pnpm run release
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          NPM_TOKEN: ${{ secrets.NPM_TOKEN }}

.husky/pre-commit

@@ -2,3 +2,5 @@
 . "$(dirname "$0")/_/husky.sh"
 
 pnpm exec concurrently pnpm:lint "pretty-quick --staged"
+pnpm run test --coverage --watchAll=false
+

README.md

@@ -40,3 +40,8 @@ The UI for import-map-overrides works in evergreen browsers (web components supp
 - [Installation](/docs/installation.md#node)
 - [API](/docs/api.md#node)
 
+## Contributing
+
+Make sure you commit a changeset with `pnpm changeset` before you open a PR.
+This will allow to automatically bump the version and maintain the CHANGELOG
+once released.

jest.config.cjs

@@ -0,0 +1,8 @@
+/** @type {import('jest').Config} */
+module.exports = {
+  collectCoverageFrom: ["src/**/*.js", "!src/api/local-storage-mock.js"],
+  resetMocks: true,
+  restoreMocks: true,
+  setupFiles: ["./jest.setup.js"],
+  testEnvironment: "jsdom",
+};

jest.setup.js

@@ -0,0 +1,3 @@
+import jestFetchMock from "jest-fetch-mock";
+
+jestFetchMock.enableMocks();

package.json

@@ -9,16 +9,18 @@
   "scripts": {
     "build": "pnpm run clean && cross-env NODE_ENV=production rollup -c",
     "build:dev": "pnpm run clean && cross-env NODE_ENV=development rollup -c",
-    "clean": "rimraf dist",
     "check-format": "prettier --check src",
+    "clean": "rimraf dist",
     "watch": "cross-env NODE_ENV=development rollup -c --watch",
     "copy-test-files": "copyfiles test/**/* dist -f",
-    "test-serve": "serve .",
-    "test-embed-serve": "serve . -l 3333",
-    "test": "concurrently pnpm:watch pnpm:copy-test-files pnpm:test-serve pnpm:test-embed-serve",
+    "serve": "serve . -l 5050",
+    "embed-serve": "serve . -l 3333",
+    "test": "jest",
     "lint": "eslint src",
     "prepublishOnly": "pnpm run build",
-    "prepare": "husky install"
+    "prepare": "husky install",
+    "changeset": "changeset",
+    "release": "changeset publish"
   },
   "exports": {
     "node": "./dist/import-map-overrides-server.js",
@@ -41,27 +43,36 @@
     "@babel/plugin-proposal-class-properties": "^7.14.5",
     "@babel/plugin-transform-react-jsx": "^7.14.5",
     "@babel/preset-env": "^7.14.8",
+    "@changesets/changelog-github": "^0.4.8",
+    "@changesets/cli": "^2.26.2",
     "@rollup/plugin-babel": "^5.3.0",
     "@rollup/plugin-node-resolve": "^13.0.2",
+    "@testing-library/jest-dom": "^6.0.0",
+    "babel-jest": "^29.6.2",
     "concurrently": "^6.2.0",
-    "copyfiles": "^2.3.0",
-    "cross-env": "^7.0.2",
+    "copyfiles": "^2.4.1",
+    "cross-env": "^7.0.3",
     "eslint": "^7.31.0",
     "eslint-config-important-stuff": "^1.1.0",
     "eslint-plugin-es5": "^1.5.0",
-    "husky": "^7.0.0",
+    "husky": "^7.0.1",
+    "jest": "^29.5.0",
+    "jest-cli": "^29.5.0",
+    "jest-environment-jsdom": "^29.5.0",
+    "jest-fetch-mock": "^3.0.3",
     "postcss": "^8.3.5",
     "preact": "^10.5.14",
     "prettier": "^2.3.2",
     "pretty-quick": "^3.1.1",
+    "regenerator-runtime": "^0.13.11",
     "rimraf": "^3.0.2",
     "rollup": "^2.53.2",
     "rollup-plugin-postcss": "^4.0.0",
     "rollup-plugin-terser": "^7.0.2",
-    "serve": "^12.0.0"
+    "serve": "^14.2.1"
   },
   "dependencies": {
     "cookie": "^0.4.1"
   },
-  "packageManager": "pnpm@8.4.0"
+  "packageManager": "pnpm@8.8.0"
 }