How can I mock chained methods

[Sharuru Z]

Hi there, I am using Spock framework in my Java project and I have a question that document can not help :(

Here is the case:

In one of my validatorImpl, before returning, I do something with error message handler like this: 

context.buildConstraintViolationWithTemplate(msg).addPropertyNode(mstChkGroupCodeDocumentNo.clearingNo()).addConstraintViolation();

And absolutely, this method should be mocked when testing the main logic of validator.

I don't know how to mock this kind of chained methods calling with Spock.

Please help me, thank you.

[Michael Kutz]

First you should definitly think about your class structure and try to avoid these massive chains.

Anyway if you cannot avoid it, you can use this syntax to ease the pain of it:

context = Mock() { buildConstraintViolationWithTemplate(msg) >> Mock(...) { addPropertyNode(mstChkGroupCodeDocumentNo.clearingNo()) >> Mock(...) { addConstraintViolation() >> ... }

You will need to put in some classes in there (where I put "...") since Spock will not be able to reflect the return type of the mocked methods.

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[Sharuru Z]

Problem solved.

Thank you for your advice on my class structure, I am working hard on it.

Have a nice day :)

在 2016年6月16日星期四 UTC+9下午3:56:23，Michael Kutz写道：