fix: align max workers with host on vitest 5

API.md

@@ -6,8 +6,8 @@ The oxlint configuration containing hapi style guide rules and config. To use in
 [`@hapi/oxc-plugin`](https://github.com/hapijs/oxc-plugin) to your `package.json`, then in your `oxlint.config.ts` add:
 
 ```ts
-import { defineConfig } from 'oxlint';
 import DefaultOxlintConfig from '@hapi/oxc-plugin/oxlint';
+import { defineConfig } from 'oxlint';
 
 export default defineConfig({
     extends: [DefaultOxlintConfig],
@@ -23,8 +23,8 @@ The [oxfmt](https://oxc.rs/docs/guide/usage/formatter/oxfmt.html) configuration
 [`@hapi/oxc-plugin`](https://github.com/hapijs/oxc-plugin) to your `package.json`, then in your `oxfmt.config.ts` add:
 
 ```ts
-import { defineConfig } from 'oxfmt';
 import DefaultOxfmtConfig from '@hapi/oxc-plugin/oxfmt';
+import { defineConfig } from 'oxfmt';
 
 export default defineConfig({
     ...DefaultOxfmtConfig,
@@ -94,8 +94,8 @@ To use it, add [`@hapi/oxc-plugin`](https://github.com/hapijs/oxc-plugin) to you
 in your `vitest.config.js` add:
 
 ```js
-import { defineConfig } from 'vitest/config';
 import oxc from '@hapi/oxc-plugin/vitest';
+import { defineConfig } from 'vitest/config';
 
 export default defineConfig({
     plugins: [oxc()],

package.json

@@ -43,14 +43,13 @@
         "lint:fix": "oxlint --fix && oxfmt --write"
     },
     "dependencies": {
-        "@oxlint/plugins": "^1.76.0"
+        "@oxlint/plugins": "^1.90.0"
     },
     "devDependencies": {
-        "@hapi/oxc-plugin": "file:.",
-        "@vitest/coverage-v8": "^4.1.10",
-        "oxfmt": "^0.61.0",
-        "oxlint": "^1.76.0",
-        "vitest": "^4.1.10"
+        "@vitest/coverage-v8": "^5.0.5",
+        "oxfmt": "^0.75.0",
+        "oxlint": "^1.90.0",
+        "vitest": "^5.0.5"
     },
     "peerDependencies": {
         "oxfmt": ">=0.61.0",

src/vitest.js

@@ -5,7 +5,7 @@ export default function (options = {}) {
 
     return {
         name: '@hapi/oxc-plugin:vitest',
-        async configureVitest({ injectTestProjects }) {
+        async configureVitest({ project, injectTestProjects }) {
             await injectTestProjects({
                 // Vitest 5 makes inline projects extend the declaring config by default, which
                 // would run the host's own tests a 2nd time under this project.
@@ -19,6 +19,9 @@ export default function (options = {}) {
                     name: '@hapi/oxc-plugin',
                     include: [Path.join(import.meta.dirname, 'vitest.test.js')],
                     exclude: [],
+                    // Without extending, our maxWorkers default ignores `vitest run` and follows the TTY,
+                    // vitest 5 then refuses to group it with the host project.
+                    maxWorkers: project.config.maxWorkers,
                 },
             });
         },

test/vitest.js

@@ -9,6 +9,7 @@ const internals = {};
 internals.inject = async function (plugin) {
     const injected = [];
     const context = {
+        project: { config: { maxWorkers: 3 } },
         injectTestProjects(config) {
             injected.push(config);
             return Promise.resolve([]);
@@ -34,6 +35,7 @@ describe('vitest plugin', () => {
         expect(injected).toHaveLength(1);
         expect(injected[0].extends).toBe(false);
         expect(injected[0].test.name).toBe('@hapi/oxc-plugin');
+        expect(injected[0].test.maxWorkers).toBe(3);
         expect(injected[0].test.include).toHaveLength(1);
         expect(injected[0].test.include[0]).toMatch(/vitest\.test\.js$/);
         expect(injected[0].define.__HAPI_OXC_OXLINT__).toBe(true);

vitest.config.js

@@ -20,7 +20,14 @@ export default defineConfig({
             },
             reportsDirectory: './coverage',
             reporter: ['text', 'lcov'],
-            exclude: ['test/**', 'dist/**', '**/*.d.ts'],
+
+            exclude: [
+                'test/**',
+                'dist/**',
+                '**/*.d.ts',
+                // Vitest 5 no longer drops the test file injected by our own plugin from coverage.
+                'src/vitest.test.js',
+            ],
         },
     },
 });