import { getEnv, getRequiredEnv, getRequiredEnvVars } from '../lib/index';

describe('process/env', () => {
    const originalEnv = process.env;

    beforeEach(() => {
        process.env = { ...originalEnv };
    });

    afterAll(() => {
        process.env = originalEnv;
    });

    test('getEnv returns optional when present', () => {
        process.env.MY_VAR = 'hello';
        expect(getEnv('MY_VAR').get()).toBe('hello');
    });

    test('getRequiredEnv returns left when missing', () => {
        delete process.env.MISSING;
        const res = getRequiredEnv('MISSING');
        expect(res.left().get().message).toMatch(/environment variable "MISSING" is required/);
    });

    test('getRequiredEnvVars collects required variables', () => {
        process.env.A = '1';
        process.env.B = '2';

        const res = getRequiredEnvVars(['A', 'B'] as const);
        expect(res.right().get()).toEqual({ A: '1', B: '2' });
    });
});