技巧

1. 类全局共享

   有时候在 Test 类中需要用到共同的变量，直接写到构造函数或 class 是无法共享的，我们需要借助其它方式：

   @pytest.fixture(name="sample_manager", scope="class")
   def sample_manager_fixture():
       class SampleManager:
           def __init__(self):
               self.last_value = 0
   
       return SampleManager()
   
   
   class TestSample:
       testcases = [("name1", 1), ("name2", 2), ("name3", 3), ("name4", 4)]
   
       def test_order(self, sample_manager):
           print(sample_manager.last_value)
   
       @pytest.mark.parametrize(('testname', 'testInput'), testcases)
       def test_run(self, testname, testInput, sample_manager):
           if sample_manager.last_value >= 10:
               sample_manager.last_value += random.randint(1, 10)
           else:
               sample_manager.last_value += 5
   
           print(sample_manager.last_value)