CodeSampleX

Sample

vitest 3.2.7: describe

Verified sample for npm vitest 3.2.7: describe. The contract ran on node 22 · linux alpine/x64 · docker and passed: describe groups test cases into a…

sha256:b2a79786b1d2d36259735b8cfa5b0addc1fe696ae183912c5400c51d268dc47b

This network offers one thing: a sample that builds. It ran the sample in a sandbox and kept the signed receipt. It grades nothing and warrants nothing — whether the same code builds where you are is not something it measured. How many distinct signing keys filed a passing contract receipt. One is the author alone; more than one means somebody else built it too. A key is self-generated with nothing registered behind it, so it counts keys, not people. MIT-0

Execution evidence

The declared environment and the signed runs are kept apart, so you can see exactly what this sample ran and where.

Evidence basis
Signed contract pass
Verification receipts
1
Signing keys that built it
1
Declared environment node 22.23 linux 24 · ubuntu · glibc 2.39 x64 node 22.23 javascript npm 10

Verification-run environments

Environment Contract Stages Run
node 22 · linux alpine/x64 · docker ed25519:c1973797be207ac4 PASS compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS
CONTAINER_RUN · node-typescript@1		 2026-08-21

Case

HOW
Goal
verify vitest.describe in pkg:npm/vitest@3.2.7
Packages
Symbols
  • vitest.describe
Environment
node 22.23.2
Created
2026-08-21T09:47:58Z

Contract

  1. describe groups test cases into a structured suite task with type 'suite' and mode 'run'
  2. nested describe calls create hierarchical suite trees preserving parent-child relationships
  3. describe.skip marks a suite and its descendant test tasks with mode 'skip'
  4. describe.todo marks a suite as a pending placeholder task with mode 'todo'
  5. describe.each dynamically generates parameterized suites for each entry in a test table
  6. describe.concurrent configures test suites for concurrent task execution
  7. describe.sequential configures test suites to execute tasks in sequential order

Files

  • PROMPT.md
  • csx.json
  • package-lock.json
  • package.json
  • spec.json
  • src/index.js
  • test/contract.mjs
  • test/fixtures/describe.test.js

Download the source artifact (tar.gz)

Source

PROMPT.md
Clean-room public code sample — generation instructions

Write a brand-new, minimal, self-contained code sample in this clean-room directory.
Do not copy, paraphrase, or reference any existing project source. Work only from this spec.

A csx.json manifest scaffold already exists. Do not recreate it from memory. Preserve its case.goal, packages and symbols; fill its empty case.contract with exact assertions and correct its environment, commands and verifierAdapter for the files you generate.

Goal: verify vitest.describe in pkg:npm/vitest@3.2.7
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:npm/vitest@3.2.7
Demonstrate these symbols/APIs:
  - vitest.describe
Constraints:
  - executionContext: node
Required runtime conditions:
  - ecosystem: npm
  - language: javascript
  - moduleSystem: cjs
  - packageManager: npm@10.9.8
  - runtime: node@22.23.2

Rules:
  - One focused purpose; the smallest project that proves the goal.
  - Include a contract test (test/contract.*) that runs OFFLINE and exits 0 exactly when the goal behavior works.
  - Pin every dependency with a lockfile so resolution is reproducible.
  - No secrets, credentials, or tokens. No real URLs (only example.com or localhost). No absolute paths.
  - No personal names, emails, company names, or project identifiers of any kind.
  - No binaries and no generated output (node_modules, dist, target, venv, .git, .env).
  - Keep it under 200 files and 256KB packed.
csx.json
{"case":{"caseId":"case:sha256:50bc42fe1f443e4ef0de31efaffe1efb8274cb120dcca4e710c3c3394ef5b240","constraints":{"executionContext":"node"},"contract":["describe groups test cases into a structured suite task with type 'suite' and mode 'run'","nested describe calls create hierarchical suite trees preserving parent-child relationships","describe.skip marks a suite and its descendant test tasks with mode 'skip'","describe.todo marks a suite as a pending placeholder task with mode 'todo'","describe.each dynamically generates parameterized suites for each entry in a test table","describe.concurrent configures test suites for concurrent task execution","describe.sequential configures test suites to execute tasks in sequential order"],"goal":"verify vitest.describe in pkg:npm/vitest@3.2.7","kind":"HOW","packages":["pkg:npm/vitest@3.2.7"],"schemaVersion":1,"symbols":["vitest.describe"]},"contractCommand":["node","test/contract.mjs"],"environment":{"arch":"x64","distro":"ubuntu","ecosystem":"npm","executionContext":"node","language":"javascript","libc":"glibc","libcVersion":"2.39","moduleSystem":"cjs","os":"linux","osVersionBucket":"24","packageManager":"npm","packageManagerVersion":"10.9.8","runtime":"node","runtimeVersion":"22.23.2","schemaVersion":1},"license":"MIT-0","packages":["pkg:npm/vitest@3.2.7"],"schemaVersion":1,"subject":"pkg:npm/vitest@3.2.7","symbols":["vitest.describe"],"verifierAdapter":"node-typescript@1"}
package-lock.json
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        "@vitest/pretty-format": "^3.2.7",
        "@vitest/runner": "3.2.7",
        "@vitest/snapshot": "3.2.7",
        "@vitest/spy": "3.2.7",
        "@vitest/utils": "3.2.7",
        "chai": "^5.2.0",
        "debug": "^4.4.1",
        "expect-type": "^1.2.1",
        "magic-string": "^0.30.17",
        "pathe": "^2.0.3",
        "picomatch": "^4.0.2",
        "std-env": "^3.9.0",
        "tinybench": "^2.9.0",
        "tinyexec": "^0.3.2",
        "tinyglobby": "^0.2.14",
        "tinypool": "^1.1.1",
        "tinyrainbow": "^2.0.0",
        "vite": "^5.0.0 || ^6.0.0 || ^7.0.0-0",
        "vite-node": "3.2.4",
        "why-is-node-running": "^2.3.0"
      },
      "bin": {
        "vitest": "vitest.mjs"
      },
      "engines": {
        "node": "^18.0.0 || ^20.0.0 || >=22.0.0"
      },
      "funding": {
        "url": "https://opencollective.com/vitest"
      },
      "peerDependencies": {
        "@edge-runtime/vm": "*",
        "@types/debug": "^4.1.12",
        "@types/node": "^18.0.0 || ^20.0.0 || >=22.0.0",
        "@vitest/browser": "3.2.7",
        "@vitest/ui": "3.2.7",
        "happy-dom": "*",
        "jsdom": "*"
      },
      "peerDependenciesMeta": {
        "@edge-runtime/vm": {
          "optional": true
        },
        "@types/debug": {
          "optional": true
        },
        "@types/node": {
          "optional": true
        },
        "@vitest/browser": {
          "optional": true
        },
        "@vitest/ui": {
          "optional": true
        },
        "happy-dom": {
          "optional": true
        },
        "jsdom": {
          "optional": true
        }
      }
    },
    "node_modules/why-is-node-running": {
      "version": "2.3.0",
      "resolved": "https://registry.npmjs.org/why-is-node-running/-/why-is-node-running-2.3.0.tgz",
      "integrity": "sha512-hUrmaWBdVDcxvYqnyh09zunKzROWjbZTiNy8dBEjkS7ehEDQibXJ7XvlmtbwuTclUiIyN+CyXQD4Vmko8fNm8w==",
      "license": "MIT",
      "dependencies": {
        "siginfo": "^2.0.0",
        "stackback": "0.0.2"
      },
      "bin": {
        "why-is-node-running": "cli.js"
      },
      "engines": {
        "node": ">=8"
      }
    }
  }
}
package.json
{
  "name": "sample-vitest-describe",
  "version": "1.0.0",
  "private": true,
  "description": "Clean-room verification of vitest.describe",
  "main": "src/index.js",
  "dependencies": {
    "vitest": "3.2.7"
  }
}
spec.json
{
  "schemaVersion": 1,
  "goal": "verify vitest.describe in pkg:npm/vitest@3.2.7",
  "kind": "HOW",
  "packages": [
    "pkg:npm/vitest@3.2.7"
  ],
  "symbols": [
    "vitest.describe"
  ],
  "constraints": {
    "executionContext": "node"
  },
  "runtimeConditions": {
    "ecosystem": "npm",
    "language": "javascript",
    "moduleSystem": "cjs",
    "packageManager": "npm@10.9.8",
    "runtime": "node@22.23.2"
  }
}
src/index.js
const { createVitest } = require('vitest/node');

/**
 * Runs Vitest programmatically against specified test files.
 * @param {string[]} files - Relative paths of test files to execute.
 * @param {object} [options] - Additional Vitest configuration options.
 * @returns {Promise<{ files: Array<object>, vitest: object }>}
 */
async function runVitestSuite(files, options = {}) {
  const vitest = await createVitest('test', {
    watch: false,
    include: files,
    reporters: [['default', { summary: false }]],
    ...options
  });
  await vitest.start(files);
  const collectedFiles = vitest.state.getFiles();
  return { files: collectedFiles, vitest };
}

module.exports = {
  runVitestSuite
};
test/contract.mjs
import assert from 'node:assert';
import { createRequire } from 'node:module';

const require = createRequire(import.meta.url);
const { runVitestSuite } = require('../src/index.js');

// 1. Export verification
assert.strictEqual(typeof runVitestSuite, 'function', 'runVitestSuite must be exported as a function');

// 2. Execute test fixture containing describe and its sub-methods
const testPath = 'test/fixtures/describe.test.js';
const { files, vitest } = await runVitestSuite([testPath]);

try {
  // 3. Verify file collection
  assert.strictEqual(files.length, 1, 'Should collect exactly one test file');
  const fileTask = files[0];
  assert.strictEqual(fileTask.result?.state, 'pass', 'Test file should pass execution');

  // 4. Verify root describe suite: describe groups test cases into a structured suite task with type 'suite' and mode 'run'
  const rootSuite = fileTask.tasks.find(t => t.name === 'Root Calculator Suite');
  assert.ok(rootSuite, 'Root describe suite should exist');
  assert.strictEqual(rootSuite.type, 'suite', 'Root suite should have type suite');
  assert.strictEqual(rootSuite.mode, 'run', 'Root suite should have mode run');
  assert.strictEqual(rootSuite.result?.state, 'pass', 'Root suite result state should be pass');

  // 5. Verify direct test task inside describe
  const directTest = rootSuite.tasks.find(t => t.name === 'performs addition in root suite');
  assert.ok(directTest, 'Direct test should exist within root suite');
  assert.strictEqual(directTest.type, 'test', 'Direct test should have type test');
  assert.strictEqual(directTest.result?.state, 'pass', 'Direct test should pass');

  // 6. Verify nested describe suite: nested describe calls create hierarchical suite trees preserving parent-child relationships
  const nestedSuite = rootSuite.tasks.find(t => t.name === 'Nested Arithmetic Suite');
  assert.ok(nestedSuite, 'Nested describe suite should exist');
  assert.strictEqual(nestedSuite.type, 'suite', 'Nested suite should have type suite');
  assert.strictEqual(nestedSuite.result?.state, 'pass', 'Nested suite should pass');
  const nestedTest = nestedSuite.tasks.find(t => t.name === 'performs multiplication in nested suite');
  assert.ok(nestedTest, 'Nested test should exist within nested suite');
  assert.strictEqual(nestedTest.result?.state, 'pass', 'Nested test should pass');

  // 7. Verify describe.skip: describe.skip marks a suite and its descendant test tasks with mode 'skip'
  const skippedSuite = rootSuite.tasks.find(t => t.name === 'Skipped Suite');
  assert.ok(skippedSuite, 'Skipped suite should exist');
  assert.strictEqual(skippedSuite.type, 'suite', 'Skipped suite should have type suite');
  assert.strictEqual(skippedSuite.mode, 'skip', 'Skipped suite mode should be skip');
  assert.strictEqual(skippedSuite.result?.state, 'skip', 'Skipped suite state should be skip');

  // 8. Verify describe.todo: describe.todo marks a suite as a pending placeholder task with mode 'todo'
  const todoSuite = rootSuite.tasks.find(t => t.name === 'Pending Feature Suite');
  assert.ok(todoSuite, 'Todo suite should exist');
  assert.strictEqual(todoSuite.type, 'suite', 'Todo suite should have type suite');
  assert.strictEqual(todoSuite.mode, 'todo', 'Todo suite mode should be todo');
  assert.strictEqual(todoSuite.result?.state, 'todo', 'Todo suite state should be todo');

  // 9. Verify describe.each: describe.each dynamically generates parameterized suites for each entry in a test table
  const paramSuites = rootSuite.tasks.filter(t => t.name.startsWith('Parameterized sum'));
  assert.strictEqual(paramSuites.length, 2, 'Should generate 2 parameterized suites from table');
  for (const suite of paramSuites) {
    assert.strictEqual(suite.type, 'suite', 'Parameterized task should be a suite');
    assert.strictEqual(suite.result?.state, 'pass', 'Parameterized suite should pass');
  }

  // 10. Verify describe.concurrent: describe.concurrent configures test suites for concurrent task execution
  const concurrentSuite = rootSuite.tasks.find(t => t.name === 'Concurrent Suite');
  assert.ok(concurrentSuite, 'Concurrent suite should exist');
  assert.strictEqual(concurrentSuite.type, 'suite', 'Concurrent suite should have type suite');
  assert.strictEqual(concurrentSuite.result?.state, 'pass', 'Concurrent suite should pass');
  assert.strictEqual(concurrentSuite.tasks.length, 2, 'Concurrent suite should have 2 tasks');

  // 11. Verify describe.sequential: describe.sequential configures test suites to execute tasks in sequential order
  const sequentialSuite = rootSuite.tasks.find(t => t.name === 'Sequential Suite');
  assert.ok(sequentialSuite, 'Sequential suite should exist');
  assert.strictEqual(sequentialSuite.type, 'suite', 'Sequential suite should have type suite');
  assert.strictEqual(sequentialSuite.result?.state, 'pass', 'Sequential suite should pass');
  assert.strictEqual(sequentialSuite.tasks.length, 2, 'Sequential suite should have 2 tasks');

  console.log('Contract tests for vitest.describe passed successfully.');
} finally {
  await vitest.close();
}
test/fixtures/describe.test.js
import { describe, it, expect, beforeAll, afterAll, beforeEach, afterEach } from 'vitest';

describe('Root Calculator Suite', () => {
  const executionSteps = [];

  beforeAll(() => {
    executionSteps.push('root:beforeAll');
  });

  beforeEach(() => {
    executionSteps.push('root:beforeEach');
  });

  afterEach(() => {
    executionSteps.push('root:afterEach');
  });

  afterAll(() => {
    executionSteps.push('root:afterAll');
  });

  it('performs addition in root suite', () => {
    expect(1 + 2).toBe(3);
  });

  describe('Nested Arithmetic Suite', () => {
    beforeEach(() => {
      executionSteps.push('nested:beforeEach');
    });

    it('performs multiplication in nested suite', () => {
      expect(3 * 4).toBe(12);
    });
  });

  describe.skip('Skipped Suite', () => {
    it('does not run assertion when suite is skipped', () => {
      expect(true).toBe(false);
    });
  });

  describe.todo('Pending Feature Suite');

  describe.each([
    { a: 2, b: 3, expected: 5 },
    { a: 10, b: 20, expected: 30 }
  ])('Parameterized sum of $a and $b', ({ a, b, expected }) => {
    it('returns correct addition', () => {
      expect(a + b).toBe(expected);
    });
  });

  describe.concurrent('Concurrent Suite', () => {
    it('executes task 1 concurrently', async () => {
      await new Promise(resolve => setTimeout(resolve, 5));
      expect(true).toBe(true);
    });

    it('executes task 2 concurrently', async () => {
      await new Promise(resolve => setTimeout(resolve, 5));
      expect(true).toBe(true);
    });
  });

  describe.sequential('Sequential Suite', () => {
    let order = 0;

    it('executes step 1 sequentially', () => {
      order += 1;
      expect(order).toBe(1);
    });

    it('executes step 2 sequentially', () => {
      order += 1;
      expect(order).toBe(2);
    });
  });
});

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