infra: properly configure jest for the monorepo setup

.vscode/settings.json

@@ -0,0 +1,3 @@
+{
+  "jest.jestCommandLine": "pnpm run test"
+}

jest.config.js

@@ -1,8 +1,10 @@
 module.exports = {
   testEnvironment: "node",
-  // Fun times waiting on pnpm installs inside of CI
   testTimeout: 120000,
-  testRegex: "tests\\/e2e\\/.+test.js",
+  testPathIgnorePatterns: ["<rootDir>/tests/fixtures/"],
   watchPathIgnorePatterns: ["<rootDir>/tests/fixtures/"],
-  globalSetup: "<rootDir>/tests/create-fixtures.js",
+  projects: [
+    "<rootDir>/packages/*/jest.config.js",
+    "<rootDir>/tests/jest.config.js",
+  ],
 };

package.json

@@ -4,6 +4,7 @@
     "@changesets/changelog-github": "^0.5.0",
     "@changesets/cli": "^2.27.1",
     "@types/jest": "^27.0.1",
+    "cross-env": "^7.0.3",
     "husky": "^7.0.2",
     "jest": "^27.5.1",
     "jest-cli": "^27.5.1",
@@ -15,9 +16,8 @@
     "rimraf": "^3.0.2"
   },
   "scripts": {
-    "clean-tests": "rimraf tests/fixtures && pnpm install",
-    "test": "pnpm run clean-tests && pnpm run test:e2e",
-    "test:e2e": "jest",
+    "test:all": "cross-env NODE_OPTIONS=--experimental-vm-modules jest --all",
+    "test": "rimraf tests/fixtures && pnpm run test:all",
     "format": "prettier . --write",
     "prepare": "husky install"
   },

packages/generator-single-spa/jest.config.js

@@ -0,0 +1,5 @@
+module.exports = {
+  testEnvironment: "node",
+  // Tests in the "src" folder are template tests which should not be run as part of the generator tests
+  testPathIgnorePatterns: ["<rootDir>/src/"],
+};

packages/single-spa-web-server-utils/.babelrc

@@ -0,0 +1,3 @@
+{
+  "presets": ["@babel/preset-env"]
+}

packages/single-spa-web-server-utils/jest.config.js

@@ -1,9 +1,14 @@
 /**  @type {import('@jest/types').Config.ProjectConfig} */
+
 const config = {
   moduleNameMapper: {
     "node-fetch": "<rootDir>/__mocks__/node-fetch.js",
     "import-map-overrides": "<rootDir>/__mocks__/import-map-overrides.js",
   },
+  transformIgnorePatterns: [
+    "/node_modules/(?!(node-fetch|lodash|import-map-overrides)/)",
+  ],
+  transform: {},
   clearMocks: true,
 };
 

packages/single-spa-web-server-utils/package.json

@@ -36,8 +36,10 @@
     "node-fetch": "^2.7.0"
   },
   "devDependencies": {
+    "@babel/preset-env": "^7.23.3",
     "@jest/globals": "^27.4.6",
     "@jest/types": "^27.4.2",
+    "babel-jest": "^27.5.1",
     "cross-env": "^7.0.3",
     "jest": "^27.4.7",
     "jest-cli": "^27.4.7"

packages/single-spa-welcome/jest.config.js

@@ -2,7 +2,7 @@ module.exports = {
   rootDir: "src",
   testEnvironment: "jsdom",
   transform: {
-    "^.+\\.(j|t)sx?$": "babel-jest",
+    "\\.[jt]sx?$": ["babel-jest", { cwd: __dirname }],
   },
   moduleNameMapper: {
     "\\.(css)$": "identity-obj-proxy",