fix(runner): fix and simplify Task.suite initialization

packages/runner/src/collect.ts

@@ -89,14 +89,6 @@ export async function collectTests(
 
     calculateSuiteHash(file)
 
-    file.tasks.forEach((task) => {
-      // task.suite refers to the internal default suite object
-      // it should not be reported
-      if (task.suite?.id === '') {
-        delete task.suite
-      }
-    })
-
     const hasOnlyTasks = someTasksAreOnly(file)
     interpretTaskModes(
       file,

packages/runner/src/suite.ts

@@ -205,7 +205,10 @@ export function getRunner(): VitestRunner {
 
 function createDefaultSuite(runner: VitestRunner) {
   const config = runner.config.sequence
-  return suite('', { concurrent: config.concurrent }, () => {})
+  const collector = suite('', { concurrent: config.concurrent }, () => {})
+  // no parent suite for top-level tests
+  delete collector.suite
+  return collector
 }
 
 export function clearCollectorContext(
@@ -295,15 +298,15 @@ function createSuiteCollector(
 ) {
   const tasks: (Test | Suite | SuiteCollector)[] = []
 
-  let suite: Suite
+  let suite!: Suite
 
   initSuite(true)
 
   const task = function (name = '', options: TaskCustomOptions = {}) {
     const task: Test = {
       id: '',
       name,
-      suite: undefined!,
+      suite: collectorContext.currentSuite?.suite,
       each: options.each,
       fails: options.fails,
       context: undefined!,
@@ -394,6 +397,7 @@ function createSuiteCollector(
     type: 'collector',
     name,
     mode,
+    suite,
     options: suiteOptions,
     test,
     tasks,
@@ -416,6 +420,7 @@ function createSuiteCollector(
       id: '',
       type: 'suite',
       name,
+      suite: collectorContext.currentSuite?.suite,
       mode,
       each,
       file: undefined!,
@@ -463,7 +468,6 @@ function createSuiteCollector(
     suite.tasks = allChildren
 
     allChildren.forEach((task) => {
-      task.suite = suite
       task.file = file
     })
 

packages/runner/src/types/tasks.ts

@@ -612,6 +612,7 @@ export interface SuiteCollector<ExtraContext = object> {
     | Test<ExtraContext>
     | SuiteCollector<ExtraContext>
   )[]
+  suite?: Suite
   task: (name: string, options?: TaskCustomOptions) => Test<ExtraContext>
   collect: (file: File) => Promise<Suite>
   clear: () => void

test/cli/fixtures/custom-runner/custom-runner.test.ts

@@ -0,0 +1,23 @@
+import {describe, expect, test as baseTest, type TestAPI} from 'vitest'
+import { getSuiteNames } from './utils';
+
+const test = baseTest as TestAPI<{__suiteNames: string[]}>
+
+test("test-a", (ctx) => {
+	expect(ctx.__suiteNames).toEqual([]);
+	expect(ctx.__suiteNames).toEqual(getSuiteNames(ctx.task.suite))
+})
+
+describe("suite-x", () => {
+	test("test-b", (ctx) => {
+		expect(ctx.__suiteNames).toEqual(['suite-x'])
+		expect(ctx.__suiteNames).toEqual(getSuiteNames(ctx.task.suite))
+	})
+
+	describe("suite-y", () => {
+		test("test-c", (ctx) => {
+			expect(ctx.__suiteNames).toEqual(['suite-y', 'suite-x'])
+			expect(ctx.__suiteNames).toEqual(getSuiteNames(ctx.task.suite))
+		})
+	})
+})

test/cli/fixtures/custom-runner/test-runner.ts

@@ -0,0 +1,13 @@
+import type { Suite, TestContext } from '@vitest/runner'
+import { VitestTestRunner } from 'vitest/runners'
+import { getSuiteNames } from './utils';
+
+class CustomTestRunner extends VitestTestRunner {
+	extendTaskContext(context: TestContext) {
+    super.extendTaskContext(context);
+		(context as any).__suiteNames = getSuiteNames(context.task.suite)
+    return context
+	}
+}
+
+export default CustomTestRunner

test/cli/fixtures/custom-runner/utils.ts

@@ -0,0 +1,10 @@
+import { Suite } from "@vitest/runner"
+
+export function getSuiteNames(suite?: Suite) {
+  const names = []
+  while (suite) {
+    names.push(suite.name)
+    suite = suite.suite
+  }
+  return names
+}

test/cli/fixtures/custom-runner/vitest.config.ts

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

test/cli/test/custom-runner.test.ts

@@ -0,0 +1,11 @@
+import { expect, test } from 'vitest'
+import { runVitest } from '../../test-utils'
+
+test('extendTaskContext provides correct context.task.suite', async () => {
+  const vitest = await runVitest({
+    root: './fixtures/custom-runner',
+    reporters: [['default', { isTTY: false }]],
+  })
+  expect(vitest.stderr).toBe('')
+  expect(vitest.stdout).toContain('✓ custom-runner.test.ts')
+})