Automated Testing with Google Antigravity: AI-Generated Tests for Jest, Vitest & Playwright

Testing is essential but time-consuming. Google Antigravity with Gemini 3 can generate comprehensive test suites in seconds. This guide shows you how to leverage AI for testing at every level.

Why Use Antigravity for Testing?

Gemini 3 understands your code deeply, enabling:

• Unit test generation from function signatures
• Integration tests that understand component relationships
• E2E tests that model user flows
• Edge case discovery humans often miss
• Test maintenance as code evolves

Setting Up Your Testing Environment

For React/Next.js Projects (Vitest)

npm install -D vitest @testing-library/react @testing-library/jest-dom jsdom

// vitest.config.ts
import { defineConfig } from 'vitest/config'
import react from '@vitejs/plugin-react'

export default defineConfig({
  plugins: [react()],
  test: {
    environment: 'jsdom',
    globals: true,
    setupFiles: './tests/setup.ts',
  },
})

For Node.js Projects (Jest)

npm install -D jest @types/jest ts-jest

// jest.config.js
module.exports = {
  preset: 'ts-jest',
  testEnvironment: 'node',
  roots: ['<rootDir>/src'],
  testMatch: ['**/__tests__/**/*.ts', '**/*.test.ts'],
};

For E2E Testing (Playwright)

npm install -D @playwright/test
npx playwright install

// playwright.config.ts
import { defineConfig } from '@playwright/test';

export default defineConfig({
  testDir: './e2e',
  fullyParallel: true,
  use: {
    baseURL: 'http://localhost:3000',
    trace: 'on-first-retry',
  },
});

Generating Unit Tests

Basic Function Testing