import { describe, expect, it } from 'vitest';

import { errorCode, formatBytes } from '@/lib/format';
import { ApiError } from '@/api/client';

describe('formatBytes', () => {
  it('renders human readable sizes', () => {
    expect(formatBytes(512)).toBe('512 B');
    expect(formatBytes(1024)).toBe('1 KB');
    expect(formatBytes(26214400)).toBe('25 MB');
    expect(formatBytes(1073741824)).toBe('1 GB');
  });

  it('handles invalid input', () => {
    expect(formatBytes(-1)).toBe('—');
    expect(formatBytes(Number.NaN)).toBe('—');
  });
});

describe('errorCode', () => {
  it('extracts the server error code', () => {
    expect(errorCode(new ApiError(403, 'perm.denied', 'nope'))).toBe('perm.denied');
  });

  it('maps unknown failures to a network code', () => {
    expect(errorCode(new Error('socket hang up'))).toBe('network.unreachable');
  });
});