get-country.spec.ts

import getCountry from '../get-country';

describe('getCountry', () => {
    beforeEach(() => {
        global.fetch = jest.fn() as jest.Mock;
    });

    afterEach(() => {
        jest.resetAllMocks();
    });

    it('should return the country code in lowercase when available', async () => {
        (global.fetch as jest.Mock).mockResolvedValue({
            text: async () => 'loc=US\nother=info\n',
        });

        const country = await getCountry();
        expect(country).toBe('us');
    });

    it('should return an empty string if the loc field is not present', async () => {
        (global.fetch as jest.Mock).mockResolvedValue({
            text: async () => 'other=info\n',
        });

        const country = await getCountry();
        expect(country).toBe('');
    });

    it('should return an empty string if the fetch fails', async () => {
        (global.fetch as jest.Mock).mockRejectedValue(new Error('Fetch failed'));

        const country = await getCountry();
        expect(country).toBe('');
    });
});