expected-node-version

const expectedNodeVersion = require('expected-node-version'); const path = require('path'); const fs = require('fs'); // Create a temporary directory for testing const tempDir = path.join(__dirname, 'temp_node_version_test'); fs.mkdirSync(tempDir, { recursive: true }); try { // Scenario 1: .nvmrc file const nvmrcPath = path.join(tempDir, '.nvmrc'); fs.writeFileSync(nvmrcPath, '18.17.1\n'); const versionFromNvmrc = expectedNodeVersion(tempDir); console.log(`Version from .nvmrc in '${tempDir}': ${versionFromNvmrc}`); // Expected: 18.17.1 fs.unlinkSync(nvmrcPath); // Scenario 2: package.json engines.node const packageJsonPath = path.join(tempDir, 'package.json'); fs.writeFileSync(packageJsonPath, JSON.stringify({ name: 'test-project', engines: { node: '>=16.0.0 <20.0.0' } }, null, 2)); const versionFromPackageJson = expectedNodeVersion(tempDir); console.log(`Version from package.json in '${tempDir}': ${versionFromPackageJson}`); // Expected: >=16.0.0 <20.0.0 fs.unlinkSync(packageJsonPath); // Scenario 3: Environment variable (simulated) // This is checked globally, so setting it before calling without a path argument process.env.npm_package_engines_node = '20.x'; const versionFromEnv = expectedNodeVersion(); // No path, checks process.env first console.log(`Version from environment variable: ${versionFromEnv}`); // Expected: 20.x delete process.env.npm_package_engines_node; // Clean up env var // Scenario 4: No version found const noVersion = expectedNodeVersion(tempDir); console.log(`Version when no file found in '${tempDir}': ${noVersion || 'Not found'}`); // Expected: Not found } finally { // Clean up the temporary directory fs.rmSync(tempDir, { recursive: true, force: true }); console.log(`Cleaned up temporary directory: ${tempDir}`); }