問題描述
我在 Mockito 中有這個:
I have this in Mockito:
when(mockedMergeContext.createNewEntityOfType(IService.class)).thenReturn(new ServiceMock());
createNewEntityOfType 方法應該總是返回一個新的 ServiceMock 實例，但它會返回兩次相同的引用.
The createNewEntityOfType method should always return a new ServiceMock instance but it returns twice the same reference.
為什么 thenReturn 方法沒有返回新的 ServiceMock?
Why the thenReturn method doesn't return new ServiceMock?
推薦答案
thenReturn 方法將始終返回傳遞給它的內容.new Servicemock() 代碼在調用 thenReturn 之前被執行.然后將創建的 ServiceMock 傳遞給 thenReturn.因此 thenReturn 具有 ServiceMock 的絕對實例，而不是創建機制.
The thenReturn method will always return what is passed to it. The code new Servicemock() is being executed prior to the call to thenReturn. The created ServiceMock is then being passed to thenReturn. Therefore thenReturn has a absolute instance of ServiceMock not a creation mechanism.
如果您需要提供新實例，請使用 thenAnswer
If you need to provide an new instance, use thenAnswer
when(mockedMergeContext.createNewEntityOfType(IService.class))
.thenAnswer(new Answer<IService>() {
public IService answer(InvocationOnMock invocation) {
return new ServiceMock();
}
});
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