hello guys I try to mock verify String format

Question

Anthony f · Answer

I know this is a inline function

Anthony f · Answer

So I expect this is replace at compile time

Anthony f · Answer

so how handle it

oleksiyp · Answer

No no way to mockk inlines

Anthony f · Answer

Anthony f · Answer

How would you do that test so

Anthony f · Answer

with a intermediate object that map the inline function

Anthony f · Answer

I even try to mock the inside of the inline function but I got some issue

oleksiyp · Answer

ehh I don t know if I should write this at all There is no normal way to do that Was just curious how to hack it ``` mockkConstructor Formatter class every anyConstructed lt Formatter gt format abc s d def 123 answers mockk every this mockk toString returns second println abc s d format def 123 ``` But mocking other cases to return normal formatting is not easy ``` mockkConstructor Formatter class every anyConstructed lt Formatter gt format any anyVararg answers val res = callOriginal val toS = res class memberProperties first it name == a getter apply isAccessible = true res toString null mockk every this mockk toString returns toS every anyConstructed lt Formatter gt format abc s d def 123 answers mockk every this mockk toString returns second println abc s format def println abc s d format ghi 123 println abc s d format def 123 ````

LeoColman · Answer

Just pass a string that wil be formatted

LeoColman · Answer

And verify that the end value is correct You re mocking too much of the implementation and that s usually a bad practice

thanksforallthefish · Answer

Agree I come from the day of jmock I mock only interfaces in general Static methods don t define a contract they are specific implementation I see no reason well I do but usually I see smell like missing providers or clean code practice to mock them as the behavior is one and only one

Anthony f · Answer

Thanks for your comment there are valuables The point is that I m on Android so I need to resolve my string resources to run what you said I m also trying to run roboelectric to get this working but I have an open issue So my idea was to spy the format function to then verify the sequence call of this format function with expected param Would you do in an other way < oleksiyp> < LeoColman> < thanksforallthefish>

oleksiyp · Answer

Extract format to a class with interface

oleksiyp · Answer

And mock it

oleksiyp · Answer

Ah probably it is because you need to deal with resources

oleksiyp · Answer

Do you need this test at all smile what s its value

Anthony f · Answer

It is contractual

Anthony f · Answer

sometimes it is more easy faster safer to test everything than ask is you should test or not

Anthony f · Answer

would it be complexe to be able to spyk it as well as spy static and object that are not available in mockk today

oleksiyp · Answer

mockkStatic and mockkObject are rather spy than mock

Anthony f · Answer

but when you use mockkStatic and mockkObject you have to define every stub isn t it so from my understanding I would not call it a spy Am I wrong

oleksiyp · Answer

You don t need to define

Anthony f · Answer

if I mock Application Companion applicationContext then I have to setup the return value like

Anthony f · Answer

``` mockkObject EDFApplication Companion every Application applicationContext getString any returns every Application applicationContext getString any any any returns ```