import { describe, expect, it } from 'vitest';
import { getShardArgs } from '../run-e2e-ci';

describe('getShardArgs', () => {
  it('runs the complete suite when no shard is configured', () => {
    expect(getShardArgs(undefined)).toEqual([]);
    expect(getShardArgs('')).toEqual([]);
  });

  it('returns a validated Playwright shard argument', () => {
    expect(getShardArgs('1/2')).toEqual(['--shard=1/2']);
    expect(getShardArgs('2/2')).toEqual(['--shard=2/2']);
  });

  it.each(['0/2', '3/2', '1/0', '1', '1/2/3', '1.5/2', '1/2.5'])(
    'rejects invalid shard value %s',
    (value) => {
      expect(() => getShardArgs(value)).toThrow(
        'LEARNITIVE_E2E_SHARD must use Playwright shard syntax such as 1/2.',
      );
    },
  );
});