test(vitest): add tests on exec args

test/run/exec-args-fixtures/forks.test.ts

@@ -0,0 +1,14 @@
+import { describe, expect, it } from 'vitest'
+
+describe('exec-args', async () => {
+  it('should have the correct flags', () => {
+    // passed via poolOptions.forks.execArgv in vitest.config.ts
+    expect(process.execArgv).toContain('--hash-seed=1')
+    expect(process.execArgv).toContain('--random-seed=1')
+    expect(process.execArgv).toContain('--no-opt')
+
+    // added via vitest
+    expect(process.execArgv).toContain('--conditions')
+    expect(process.execArgv).toContain('node')
+  })
+})

test/run/exec-args-fixtures/threads.test.ts

@@ -0,0 +1,12 @@
+import { describe, expect, it } from 'vitest'
+
+describe('exec-args', async () => {
+  it('should have the correct flags', () => {
+    // passed via poolOptions.forks.execArgv in vitest.config.ts
+    expect(process.execArgv).toContain('--inspect-brk')
+
+    // added via vitest
+    expect(process.execArgv).toContain('--conditions')
+    expect(process.execArgv).toContain('node')
+  })
+})

test/run/exec-args-fixtures/vmThreads.test.ts

@@ -0,0 +1,16 @@
+import { describe, expect, it } from 'vitest'
+
+describe('exec-args', async () => {
+  it('should have the correct flags', () => {
+    // passed via poolOptions.vmThreads.execArgv in vitest.config.ts
+    expect(process.execArgv).toContain('--inspect-brk')
+
+    // added via vitest
+    expect(process.execArgv).toContain('--experimental-import-meta-resolve')
+    expect(process.execArgv).toContain('--experimental-vm-modules')
+    expect(process.execArgv).toContain('--require')
+    expect(process.execArgv).toContainEqual(expect.stringContaining('/packages/vitest/suppress-warnings.cjs'))
+    expect(process.execArgv).toContain('--conditions')
+    expect(process.execArgv).toContain('node')
+  })
+})

test/run/no-exec-args-fixtures/no-exec-argv.test.ts

@@ -0,0 +1,12 @@
+import { describe, expect, it } from 'vitest'
+
+describe('exec-args', async () => {
+  it('should have the correct flags', () => {
+    // flags should not be passed
+    expect(process.execArgv).not.toContain('--inspect-brk')
+
+    // added via vitest
+    expect(process.execArgv).toContain('--conditions')
+    expect(process.execArgv).toContain('node')
+  })
+})

test/run/no-exec-args-fixtures/vitest.config.ts

@@ -0,0 +1,7 @@
+import { defineConfig } from 'vitest/config'
+
+export default defineConfig({
+  test: {
+    pool: 'threads',
+  },
+})

test/run/package.json

@@ -5,6 +5,7 @@
     "test": "vitest"
   },
   "devDependencies": {
+    "execa": "^7.1.1",
     "vite": "latest",
     "vitest": "workspace:*"
   }

test/run/test/exec-args.test.ts

@@ -0,0 +1,30 @@
+import { expect, test } from 'vitest'
+import { execa } from 'execa'
+import { runVitest } from '../../test-utils'
+
+test.each([
+  { pool: 'forks', execArgv: ['--hash-seed=1', '--random-seed=1', '--no-opt'] },
+  { pool: 'threads', execArgv: ['--inspect-brk'] },
+  { pool: 'vmThreads', execArgv: ['--inspect-brk'] },
+] as const)('should pass execArgv to { pool: $pool } ', async ({ pool, execArgv }) => {
+  const fileToTest = `exec-args-fixtures/${pool}.test.ts`
+
+  const vitest = await runVitest({
+    include: [fileToTest],
+    pool,
+    poolOptions: {
+      [pool]: {
+        execArgv,
+      },
+    },
+  })
+
+  expect(vitest.stdout).toContain(`✓ ${fileToTest}`)
+})
+
+test('should not pass execArgv to workers when not specified in the config', async () => {
+  const { stdout } = await execa('npx', ['vitest', '--run', '--root', 'no-exec-args-fixtures', '--config', 'vitest.config.ts'],
+    { env: { NODE_OPTIONS: '--inspect-brk' } })
+
+  expect(stdout).toContain('✓ no-exec-argv.test.ts')
+})