gubu

import { Gubu } from 'gubu' // Using ESM syntax for modern projects const optionsShape = Gubu({ server: { port: 8080, // Default 8080, optional host: 'localhost', // Default 'localhost', optional secure: Boolean // Required boolean, no default }, client: { timeout: Number, // Required number, no default debug: Boolean, // Required boolean, no default headers: [String], // Array of strings, optional, empty array default if not provided retries: 3 // Default 3, optional }, plugins: [ // Array of objects, optional, empty array default { name: String, // Required string enabled: Boolean // Required boolean } ] }) console.log('--- Scenario 1: Empty input, check defaults and required fields ---') let config1 = {} try { optionsShape(config1) // Mutates config1 console.log('Validated Config 1:', JSON.stringify(config1, null, 2)) } catch (e: any) { console.error('Validation Error 1:', e.message) } console.log('\n--- Scenario 2: Partial input, check deep merging and specific values ---') let config2 = { server: { port: 9000, secure: true }, client: { timeout: 5000, debug: false, headers: ['X-Custom-Header-A'] } } try { optionsShape(config2) // Mutates config2 console.log('Validated Config 2:', JSON.stringify(config2, null, 2)) } catch (e: any) { console.error('Validation Error 2:', e.message) } console.log('\n--- Scenario 3: Invalid input type for a field ---') let config3 = { server: { port: 'not-a-number', // Invalid type secure: true }, client: { timeout: 1000, debug: true, headers: [] } } try { optionsShape(config3) console.log('Validated Config 3:', JSON.stringify(config3, null, 2)) } catch (e: any) { console.error('Validation Error 3:', e.message) } console.log('\n--- Scenario 4: Missing a required field ---') let config4 = { server: { port: 8080, // secure is missing }, client: { timeout: 1000, debug: true, headers: [] } } try { optionsShape(config4) console.log('Validated Config 4:', JSON.stringify(config4, null, 2)) } catch (e: any) { console.error('Validation Error 4:', e.message) }