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JsonPath won't work in Kotlin test cases [SPR-17329] #21863

spring-issuemaster opened this issue Oct 3, 2018 · 2 comments


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commented Oct 3, 2018

Muhammad opened SPR-17329 and commented

I've an API /users returns 


I am trying to test the api in kotlin:

                .andDo { print() }
                .andExpect { status().isOk }
                .andExpect { jsonPath("\$[*].username").value(arrayContainingInAnyOrder("invalid", "always", "success")) }

It never fails, however the predicate is false.

I've created a sample spring-boot project that run the same test case in Java (which fails, and it should) and in Kotlin and it did not fail.

I've created two additional test cases to test jsonpath in isolation from spring test, and it reported that, both java and kotlin is working fine.

The link to project on github:

Reference URL:


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commented Oct 4, 2018

Muhammad commented

It would work fine if wrap the function object "resultMatcher" into an inlined function expression that returns another ResultMatcher, like this:

val resultMatcher: ResultMatcher =
                        .value(arrayContainingInAnyOrder("invalid", "always", "success"))

                .andDo { print() }
                .andExpect { result -> resultMatcher.match(result) }

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commented Nov 5, 2018

Sébastien Deleuze commented

It seems there is a mistake in the Kotlin repro test which is using andExpect { } which should be used with a lambda throwing an exception instead of andExpect ( ) which should be used in your case like in Java with regular parenthesis.

Following code works as expected:

Unable to find source-code formatter for language: kotlin. Available languages are: actionscript, ada, applescript, bash, c, c#, c++, cpp, css, erlang, go, groovy, haskell, html, java, javascript, js, json, lua, none, nyan, objc, perl, php, python, r, rainbow, ruby, scala, sh, sql, swift, visualbasic, xml, yamlmockMvc.perform(get("/users")
                .andExpect(jsonPath("\$[*].username").value(arrayContainingInAnyOrder("invalid", "always", "success")))
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