libs/monorepo-utils: Switch from jest to vitest

libs/monorepo-utils/package.json

@@ -15,19 +15,19 @@
     "lint": "pnpm type-check && eslint .",
     "lint:fix": "pnpm type-check && eslint . --fix",
     "test": "is-ci test:ci test:watch",
-    "test:coverage": "jest --coverage",
-    "test:watch": "jest --watch",
-    "test:ci": "jest --coverage --ci --reporters=default --reporters=jest-junit --maxWorkers=7",
+    "test:coverage": "vitest --coverage",
+    "test:watch": "vitest",
+    "test:ci": "vitest run --coverage",
     "pre-commit": "lint-staged"
   },
   "dependencies": {
     "@votingworks/basics": "workspace:*"
   },
   "devDependencies": {
-    "@types/jest": "^29.5.3",
     "@types/node": "20.16.0",
     "@typescript-eslint/eslint-plugin": "6.7.0",
     "@typescript-eslint/parser": "6.7.0",
+    "@vitest/coverage-istanbul": "^2.1.8",
     "esbuild-runner": "2.2.2",
     "eslint": "8.57.0",
     "eslint-config-prettier": "^9.0.0",
@@ -38,14 +38,11 @@
     "eslint-plugin-prettier": "^5.0.0",
     "eslint-plugin-vx": "workspace:*",
     "is-ci-cli": "2.2.0",
-    "jest": "^29.6.2",
-    "jest-junit": "^16.0.0",
-    "jest-watch-typeahead": "^2.2.2",
     "lint-staged": "11.0.0",
     "prettier": "3.0.3",
     "sort-package-json": "^1.50.0",
-    "ts-jest": "29.1.1",
-    "typescript": "5.6.2"
+    "typescript": "5.6.2",
+    "vitest": "^2.1.8"
   },
   "packageManager": "[email protected]"
 }

libs/monorepo-utils/src/circleci.test.ts

@@ -1,3 +1,4 @@
+import { expect, test } from 'vitest';
 import { join } from 'node:path';
 import { generateConfig } from './circleci';
 import { getWorkspacePackageInfo } from './pnpm';

libs/monorepo-utils/src/circleci.ts

@@ -14,7 +14,6 @@ function jobIdForRustPackageId(pkgId: string): string {
 function generateTestJobForNodeJsPackage(
   pkg: PnpmPackageInfo
 ): Optional<string[]> {
-  /* istanbul ignore next */
   if (!pkg.packageJson?.scripts?.['test']) {
     // exclude packages without tests
     return;
@@ -98,11 +97,12 @@ function generateTestJobForRustCrate(pkgId: string): string[] {
 }
 
 function generateTestJobForPackage(pkg: PnpmPackageInfo): Optional<string[]> {
+  /* istanbul ignore else - @preserve */
   if (pkg.packageJson) {
     return generateTestJobForNodeJsPackage(pkg);
   }
 
-  /* istanbul ignore next */
+  /* istanbul ignore next - @preserve */
   throw new Error(`Unsupported package type: ${pkg.relativePath}`);
 }
 

libs/monorepo-utils/src/dependencies.test.ts

@@ -1,3 +1,4 @@
+import { expect, test } from 'vitest';
 import { join } from 'node:path';
 import {
   findAllMonorepoDependencies,

libs/monorepo-utils/src/pnpm.test.ts

@@ -1,3 +1,4 @@
+import { expect, test } from 'vitest';
 import { relative } from 'node:path';
 import { getWorkspacePackageInfo, getWorkspacePackagePaths } from './pnpm';
 

libs/monorepo-utils/src/pnpm.ts

@@ -12,7 +12,7 @@ function maybeReadJson(filepath: string): unknown {
   try {
     return JSON.parse(readFileSync(filepath, { encoding: 'utf-8' }));
   } catch {
-    // istanbul ignore next
+    /* istanbul ignore next - @preserve */
     return undefined;
   }
 }

libs/monorepo-utils/src/unused.test.ts

@@ -1,3 +1,4 @@
+import { expect, test } from 'vitest';
 import { PnpmPackageInfo } from './types';
 import { findUnusedPackages } from './unused';
 

libs/monorepo-utils/vitest.config.mts

@@ -0,0 +1,3 @@
+import { defineConfig } from '../../vitest.config.shared.mjs';
+
+export default defineConfig();