Do you use the ActivityTestRule to start the particular activity, or are you just starting the app like normal?

What Kotlin testing libraries/frameworks are available for testing Common modules?

Has anyone had issues with

assertFailsWith

? When using it in a multiplatform project, I can consistently reproduce an issue on the JS platform (everything is fine on JVM). When I use

assertFailsWith(SomeException::class)

everything works as expected (the exception is thrown, the test pass). When I use

assertFailsWith<SomeException>

variant, the test fails as if no exception was thrown by the block. Only a couple of my tests work properly no matter the form used, but all the others fail consistently with the 2nd form and succeed with the 1st form, and I have no idea how this is possible, both are inline functions calling the same 3rd function… I really don’t get it.

In Mockito I used to do stuff like this:

`when`(api.method())
            .then { throw anError }
            .thenReturn(something)

which basically meant: first time it is called throw

anError

, second time return

something

Is there a way to do something like this with MockK?

I would I go about to unit test this function?

fun createCoroutineScope(): CoroutineScope = CoroutineScope(SupervisorJob() + Dispatchers.Default)

So in my test I have to check if the returned

CoroutineScope

is using a

SupervisedJob

or a particular

Dispatcher

how do I do that?? (or any other property of the context/scope) For instance, say I wanna write an unit test that force me to create a

CoroutineScope(SupervisorJob())

@Test
fun createCoroutineScope_produce_a_supervisor_job() {
  val scope = createCoroutineScope()
  val job = scope.coroutineContext[Job]
  assertTrue(job is SupervisorJob) // can't do
}

SupervisorJob

is not an interface or a class, it's a top level function. It's implementation tells me nothing about what kind of job it is or how it handle children. The implementation is private. I cannot find a way to force me to write that code from an unit test, can anyone enlighten me? (I've asked this in #getting-started but I realized it is better suited here + I asked it better here)

I want to test that calling a given method on my subject/unit under test calls a given method on a mock, with any lambda as an argument. However if I do this:

subject.openThePodBayDoors()

verify(mockDoorManager).completion(Mockito.any())

...then I get an error:

java.lang.IllegalStateException: Mockito.any() must not be null

...even though I have written the production code which should make this test pass. I’ve been googling “kotlin mockito match any lambda” etc. and can find complex tests with

LambdaMatcher

but all I want to do is check that the method was called with some lamba - I don’t even care what it does for this test. There must be a simple solution for this I’m missing, surely?

hey folks, am I getting this right that whenever a

kotlin-test-junit

dependency is added,

junit

should also be added explicitly?

Hi All, after upgrading build gradle tools from 4.0.2 to 4.1.0 my jacoco coverage reports state zero percentage of coverage, anyone experiencing the same issue? I'm using jacoco plugin 0.8.6

Good Morning / Good Afternoon. We are looking to do end-to-end testing for our Kotlin microservices. We have previously used https://cucumber.io/docs/installation/kotlin/ and i am wondering if anyone has used any different tools/tech which could be of advantage to us. Thanks

Which library are you using for snapshot testing in Kotlin, if any? 🙂

I have a plain old little java library with about 20 unit tests, but now I want to just change one variable for the tests so that I have 40 tests (its the same 20 tests, ran twice, with different inputs). How can you do that with kotlin + gradle?

Running tests stopped showing results in the test result pane. All I get now is the gradle run pane. Any way to get it back? (edited) i.e. this pane is missing when running my tests. I tried invalidate/restart with no luck

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Hi 👋 folks! How do you create a test suite for kotlin common tests ?

Is there anything built in to check if a String matches a regex? I know I could assertTrue with a Regex, but I’d like the output to give me the failing string and the regex if it fails.

Anyone has any idea to write a unit test for this ViewModel file? I appreciate if you can give me an example code or any keyword for me to search the issue? Thank you very much

Hello friends, is there a test automation framework in Kotlin like Cypress (http://cypress.io)?