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Autofixture-GuardClauseseException

autofixture unit-testing c#

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Nick77 · 技术社区 · 7 年前

我有不同的类,它们都将对象作为输入,并根据这些对象执行httprequest(我将对象格式化为json并发出请求)

IFixture fixture = new Fixture().Customize(new AutoMoqCustomization());
var assertion = new GuardClauseAssertion(fixture);

然后,在我所有的课程中,我都这样做:

assertion.Verify(typeof(MyClass));

到目前为止,每个班都通过了考试,但有一个班没有通过。测试引发异常

Message: Ploeh.AutoFixture.Idioms.GuardClauseException : A Guard Clause test was performed
on a method that may contain a deferred iterator block, but the test failed. See the inner
exception for more details. However, because of the deferred nature of the iterator block,
this test failure may look like a false positive. Perhaps you already have a Guard Clause
in place, but in conjunction with the 'yield' keyword (if you're using C#); if this is the
case, the Guard Clause is dormant, and will first be triggered when a client starts looping
over the iterator. This doesn't adhere to the Fail Fast principle, so should be addressed.

----> Ploeh.AutoFixture.Idioms.GuardClauseException : An attempt was made to assign the
value null to the parameter "status" of the method "ChangeStatus", and no Guard Clause
prevented this. Are you missing a Guard Clause?
Method Signature: System.String ChangeStatus(Interfaces.IProject, Status)
Parameter Type: Status, , Version=1.0.0.0
Culture=neutral, PublicKeyToken=bd4b9bc26bc147ff
Declaring Type: ReleaseRepository, 
Version=1.0.0.0, Culture=neutral, PublicKeyToken=bd4b9bc26bc147ff
Reflected Type: ReleaseRepository
Version=1.0.0.0, Culture=neutral, PublicKeyToken=bd4b9bc26bc147ff
  ----> System.InvalidOperationException : The passed project has no valid name.

在我的类的最后一个方法中,它看起来像这样:

if(string.IsNullOrEmpty(myObject.Name))
     throw new InvalidOperationException("...");

内部异常中提到的方法是: (状态是一个枚举,但我在其他不是枚举的对象上遇到了错误)

public string ChangeStatus(IObject1, IObject2, Status status)
{
// Here are the if clauses to check if something is null or not given
return client.Post(url, status);
}

我很奇怪,因为我在所有其他类中使用相同类型的对象执行相同的if子句,它们都会传递。

(与此测试相同:)

assertion.Verify(typeof(myObject).GetMethods());

我不知道原因是什么。

1 回复 | 直到 7 年前

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Nick77 7 年前

我的班现在通过了考试。

很抱歉,我没有/无法提供任何MCV,但我根本无法/无法再现该问题。

我删除了一些if子句并添加了一些,在某个时候,我在ChangeStatus()中为我的枚举状态添加了一个null检查

public string changeStatus(IObject1, IObject2, Status status)
if(status == null)
   throw new Exception();