How do I set a property on a mocked object using Mockito?

问题

I have a scenario where I have to set a property of a mocked object as follows:

SlingHttpRequest slingHttpRequest= mock(SlingHttpRequest);
slingHttpRequest.setAttribute("search", someObject);

When I try to print this attribute I get null. How do I set this property?

回答1:

You don't normally set properties on your mocked objects; instead, you do some specific thing when it's invoked.

when(slingHttpRequest.getAttribute("search")).thenReturn(someObject);

回答2:

Mock object is not where you store data, it's for you to teach the behavior when its methods are invoked.

try this: https://www.google.com/search?q=mockito+example&oq=mockito+example&aqs=chrome..69i57j0l5.6790j0j7&sourceid=chrome&espv=210&es_sm=93&ie=UTF-8

回答3:

I'm afraid you're misusing your mock SlingHttpRequest.

Mockito requires you to wire up your mock's properties before you use them in your test scenarios, i.e.:

Mockito.when(slingHttpRequest.getAttribute("search")).thenReturn(new Attribute());

You cannot call the setAttribute(final Attribute a) method during the test like so:

slingHttpRequest.setAttribute(someObject);

If you do this, when the test runs, getAttribute() will return null.

Incidently, if the code you are unit testing is going to call a setter on your mock in this way, do not use a mock. Use a stub.

来源：https://stackoverflow.com/questions/19920271/how-do-i-set-a-property-on-a-mocked-object-using-mockito