传递多个参数以实例化Pytest中的多个对象

Question

相关：Passing arguments to instantiate object in Pytest

我有MyClass1和2，它们被MyClass3占用了。像这样：

class MyClass1:
    def __init__(self, a):
        self.a = a

class MyClass2:
    def __init__(self, b):
        self.b = b

class MyClass3:
    def __init__(self, obj1, obj2):
        self.obj1 = obj1
        self.obj2 = obj2

    def joint_operation(self):
        return self.obj1.a + self.obj2.b

我希望测试以下设置的迭代：

my_obj1 = MyClass1("a")
my_obj2 = MyClass2("b")
my_obj3 = MyClass3(my_obj1, my_obj2)
assert my_obj3.joint_operation == my_obj1.a + my_obj2.b

大概以某种方式扩展了这种模式：

@pytest.mark.parametrize("test, expected", TEST_CASES, indirect=["test"])