backend/tests/mongoUrlValidation.test.js

import { getValidatedMongoUrl } from '../utils/mongoUrlValidation.js';

describe('getValidatedMongoUrl', () => {
    const originalMongoUrl = process.env.MONGO_URL;

    afterEach(() => {
        if (originalMongoUrl !== undefined) {
            process.env.MONGO_URL = originalMongoUrl;
        } else {
            delete process.env.MONGO_URL;
        }
    });

    test('throws when MONGO_URL is missing', () => {
        delete process.env.MONGO_URL;
        expect(() => getValidatedMongoUrl()).toThrow(
            'FATAL: MONGO_URL environment variable is required and must include an explicit database name.'
        );
    });

    test('throws when MONGO_URL does not include a database name', () => {
        expect(() =>
            getValidatedMongoUrl('mongodb+srv://testuser:testpass@cluster.mongodb.net/?appName=Agromind')
        ).toThrow('FATAL: MONGO_URL must include an explicit database name in the path');
    });

    test('accepts MONGO_URL with explicit database name', () => {
        const url = 'mongodb+srv://testuser:testpass@cluster.mongodb.net/agromind?appName=Agromind';
        expect(getValidatedMongoUrl(url)).toBe(url);
    });

    test('throws when database path ends with trailing slash', () => {
        expect(() =>
            getValidatedMongoUrl('mongodb+srv://testuser:testpass@cluster.mongodb.net/agromind/?appName=Agromind')
        ).toThrow('FATAL: MONGO_URL must include an explicit database name in the path');
    });
});