pytest使用parametrize将参数化变量传递到fixture

# 目录结构
-- /demo_top
  -- /demo_sub
      __init__.py
      conftest.py
      test_case.py
  __init__.py
  conftest.py

# content of /demo_top/conftest.py
import pytest
@pytest.fixture()
def gen_token(request):
    params = request.param
    print("\n根目录下gen_token()拿到的参数：", params)
    if params[0] + params[1] == 5:
        return "api_token"
    else:
        return None

# content of /demo_top/demo_sub/conftest.py
import pytest
@pytest.fixture()
def setup_before(request, gen_token):
    print("执行子级setup_before，拿到的传参：", request.param)
    print("执行子级setup_before，拿到gen_token的返回值：", gen_token)
    if gen_token:
        yield "造数完成"
        print("测试用例test_case执行完毕，清理测试数据")
    else:
        pytest.skip("跳过")

# content of /demo_top/demo_sub/test_case.py
import pytest
test_param = [(1, 4)]
@pytest.mark.parametrize("gen_token", test_param, indirect=True)
@pytest.mark.parametrize("setup_before", test_param, indirect=True)
def test_case1(gen_token, setup_before):
    print("\n测试用例里拿到的gen_token返回值：", gen_token)
    print("测试用例里拿到的setup_before返回值：", setup_before)
    print("执行测试用例test_case1...")
if __name__ == '__main__':
    pytest.main(['-s', 'test_case.py'])

test_case.py                                                            [100%]
============================== 1 passed in 0.08s ==============================
根目录下gen_token()拿到的参数： (1, 4)
执行子级setup_before，拿到的传参： (1, 4)
执行子级setup_before，拿到gen_token的返回值： api_token
.
测试用例里拿到的gen_token返回值： api_token
执行测试用例test_case1...
测试用例test_case执行完毕，清理测试数据
Process finished with exit code 0

test_case.py                                                            [100%]
============================= 1 skipped in 0.08s ==============================s
根目录下gen_token()拿到的参数： (2, 4)
执行子级setup_before，拿到的传参： (2, 4)
执行子级setup_before，拿到gen_token的返回值： None
Skipped: 跳过
Process finished with exit code 0