gemini-cli/integration-tests/deprecation-warnings.test.ts

/**
 * @license
 * Copyright 2026 Google LLC
 * SPDX-License-Identifier: Apache-2.0
 */

import { describe, it, beforeEach, afterEach } from 'vitest';
import { TestRig } from './test-helper.js';

/**
 * integration test to ensure no node.js deprecation warnings are emitted.
 * must run for all supported node versions as warnings may vary by version.
 */
describe('deprecation-warnings', () => {
  let rig: TestRig;

  beforeEach(() => {
    rig = new TestRig();
  });

  afterEach(async () => await rig.cleanup());

  it.each([
    { command: '--version', description: 'running --version' },
    { command: '--help', description: 'running with --help' },
  ])(
    'should not emit any deprecation warnings when $description',
    async ({ command, description }) => {
      await rig.setup(
        `should not emit any deprecation warnings when ${description}`,
      );

      const { stderr, exitCode } = await rig.runWithStreams([command]);

      // node.js deprecation warnings: (node:12345) [DEP0040] DeprecationWarning: ...
      const deprecationWarningPattern = /\[DEP\d+\].*DeprecationWarning/i;
      const hasDeprecationWarning = deprecationWarningPattern.test(stderr);

      if (hasDeprecationWarning) {
        const deprecationMatches = stderr.match(
          /\[DEP\d+\].*DeprecationWarning:.*/gi,
        );
        const warnings = deprecationMatches
          ? deprecationMatches.map((m) => m.trim()).join('\n')
          : 'Unknown deprecation warning format';

        throw new Error(
          `Deprecation warnings detected in CLI output:\n${warnings}\n\n` +
            `Full stderr:\n${stderr}\n\n` +
            `This test ensures no deprecated Node.js modules are used. ` +
            `Please update dependencies to use non-deprecated alternatives.`,
        );
      }

      // only check exit code if no deprecation warnings found
      if (exitCode !== 0) {
        throw new Error(
          `CLI exited with code ${exitCode} (expected 0). This may indicate a setup issue.\n` +
            `Stderr: ${stderr}`,
        );
      }
    },
  );
});