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feat(vitest): support hooks in bench runner #5076

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feat(vitest): support hooks in bench runner #5076

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2 changes: 1 addition & 1 deletion packages/runner/src/index.ts
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Original file line number Diff line number Diff line change
@@ -1,4 +1,4 @@
export { startTests, updateTask } from './run'
export { startTests, updateTask, callSuiteHook, callCleanupHooks } from './run'
export { test, it, describe, suite, getCurrentSuite, createTaskCollector } from './suite'
export { beforeAll, beforeEach, afterAll, afterEach, onTestFailed } from './hooks'
export { setFn, getFn, getHooks, setHooks } from './map'
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2 changes: 1 addition & 1 deletion packages/runner/src/run.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -106,7 +106,7 @@ async function sendTasksUpdate(runner: VitestRunner) {
}
}

async function callCleanupHooks(cleanups: HookCleanupCallback[]) {
export async function callCleanupHooks(cleanups: HookCleanupCallback[]) {
await Promise.all(cleanups.map(async (fn) => {
if (typeof fn !== 'function')
return
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18 changes: 15 additions & 3 deletions packages/vitest/src/runtime/runners/benchmark.ts
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Original file line number Diff line number Diff line change
@@ -1,5 +1,5 @@
import type { Suite, Task, VitestRunner, VitestRunnerImportSource } from '@vitest/runner'
import { updateTask as updateRunnerTask } from '@vitest/runner'
import type { HookCleanupCallback, Suite, Task, VitestRunner, VitestRunnerImportSource } from '@vitest/runner'
import { callCleanupHooks, callSuiteHook, updateTask as updateRunnerTask } from '@vitest/runner'
import { createDefer, getSafeTimers } from '@vitest/utils'
import { getBenchFn, getBenchOptions } from '../benchmark'
import { getWorkerState } from '../../utils'
Expand Down Expand Up @@ -35,6 +35,10 @@ async function runBenchmarkSuite(suite: Suite, runner: NodeBenchmarkRunner) {
benchmarkSuiteGroup.push(task)
}

let beforeAllCleanups: HookCleanupCallback[] = []

beforeAllCleanups = await callSuiteHook(suite, suite, 'beforeAll', runner, [suite])

if (benchmarkSuiteGroup.length)
await Promise.all(benchmarkSuiteGroup.map(subSuite => runBenchmarkSuite(subSuite, runner)))

Expand Down Expand Up @@ -90,7 +94,12 @@ async function runBenchmarkSuite(suite: Suite, runner: NodeBenchmarkRunner) {
await task.warmup()
tasks.push([
await new Promise<BenchTask>(resolve => setTimeout(async () => {
resolve(await task.run())
let beforeEachCleanups: HookCleanupCallback[] = []
beforeEachCleanups = await callSuiteHook(benchmark.suite, benchmark, 'beforeEach', runner, [benchmark.context, benchmark.suite])
const result = await task.run()
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Can we use tinybench's hooks? I don't have any issues with this, but just asking.

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@adriencaccia adriencaccia Jan 30, 2024 •
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Interesting idea!
I think we might need to refine what each hook does, since in benchmarking there is one more level of hooks.

At the moment, with my implementation, this is what would happen (I added some comment at the end to see the execution order):

import {
  afterAll,
  afterEach,
  beforeAll,
  beforeEach,
  bench,
  describe,
} from 'vitest'

describe('hooks', () => {
  beforeAll(() => {
    console.log('beforeAll')
  })
  beforeEach(() => {
    console.log('beforeEach')
  })
  afterEach(() => {
    console.log('afterEach')
  })
  afterAll(() => {
    console.log('afterAll')
  })

  bench('one', () => {
    console.log('bench one')
  }, {
    setup: () => {
      console.log('setup')
    },
    teardown: () => {
      console.log('tearDown')
    },
    iterations: 10,
    time: 1,
  })
})

// when the bench is executed, the following should be logged

// beforeAll
// beforeEach
// setup     x10
// bench one x10
// tearDown  x10
// afterEach
// beforeAll

Do you think it is what should be expected?

As far as using the hooks from tinybench, I can map the *Each hooks from vitest to the Task *All hooks from tinybench.

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Oh interesting edge case, nice, I think let's keep it as is and this should be documented somewhere.

After all, @sheremet-va might have some interesting ideas and insights around this.

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I think it makes more sense to use Vitest's hooks. They are shown in the reporter for example if they take too long.

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Okay, I will go and try to add a test that verify the order of execution of the hooks

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I will switch the PR to draft for the moment, and mark it as ready when I will have added the tests

await callSuiteHook(benchmark.suite, benchmark, 'afterEach', runner, [benchmark.context, benchmark.suite])
await callCleanupHooks(beforeEachCleanups)
resolve(result)
})),
benchmark,
])
Expand All @@ -115,6 +124,9 @@ async function runBenchmarkSuite(suite: Suite, runner: NodeBenchmarkRunner) {
await defer
}

await callSuiteHook(suite, suite, 'afterAll', runner, [suite])
await callCleanupHooks(beforeAllCleanups)

function updateTask(task: Task) {
updateRunnerTask(task, runner)
}
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4 changes: 3 additions & 1 deletion test/benchmark/specs/runner.test.mjs
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Original file line number Diff line number Diff line change
Expand Up @@ -8,7 +8,7 @@ if (existsSync('./bench.json'))
rmSync('./bench.json')

try {
await startVitest('benchmark', ['base.bench', 'mode.bench', 'only.bench'], {
await startVitest('benchmark', ['base.bench', 'mode.bench', 'only.bench', 'hooks.bench'], {
watch: false,
})
}
Expand All @@ -28,6 +28,8 @@ await test('benchmarks are actually running', async () => {
assert.ok(resultJson.testResults.a2, 'a2 is in results')
assert.ok(resultJson.testResults.b3, 'b3 is in results')
assert.ok(resultJson.testResults.b4, 'b4 is in results')
assert.ok(resultJson.testResults.hooks, 'hooks is in results')
assert.ok(resultJson.testResults['hooks-cleanup'], 'hooks-cleanup is in results')
})

await test('doesn\'t have skipped tests', () => {
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60 changes: 60 additions & 0 deletions test/benchmark/test/hooks.bench.ts
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Original file line number Diff line number Diff line change
@@ -0,0 +1,60 @@
import {
afterAll,
afterEach,
beforeAll,
beforeEach,
bench,
describe,
expect,
} from 'vitest'

describe('hooks', () => {
let cleanUpCount = 0
describe('run', () => {
beforeAll(() => {
cleanUpCount += 10
})
beforeEach(() => {
cleanUpCount += 1
})
afterEach(() => {
cleanUpCount -= 1
})
afterAll(() => {
cleanUpCount -= 10
})

bench('one', () => {
expect(cleanUpCount).toBe(11)
})
bench('two', () => {
expect(cleanUpCount).toBe(11)
})
})
bench('end', () => {
expect(cleanUpCount).toBe(0)
})
})

describe('hooks-cleanup', () => {
let cleanUpCount = 0
beforeAll(() => {
cleanUpCount += 10
return () => {
cleanUpCount -= 10
}
})
beforeEach(() => {
cleanUpCount += 1
return () => {
cleanUpCount -= 1
}
})

bench('one', () => {
expect(cleanUpCount).toBe(11)
})
bench('two', () => {
expect(cleanUpCount).toBe(11)
})
})
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