GraphQlTester.Response should expose extensions

[nlemoing]

Hi, I recently implemented a feature which uses GraphQL Extensions and I'm trying to write a test which validates that they're being returned properly. It looks like extensions are available in the GraphQlResponse class but aren't available in the GraphQlTester.Response interface. Is there another way to access them, and if not, would it be possible to extend the interface to include extensions?

[rstoyanchev]

That's not possible at the moment indeed, and just a matter of exposing it through GraphQlTester.Response.

[nlemoing]

Thanks for looking into this! I discovered another related issue today: it appears that extensions don't get included in WebSocket requests made with the GraphQL tester.

Minimal example:

@Test
fun testSubscription() {
    val client = StandardWebSocketClient()
    // spring-graphql instance running on port 61686
    val tester = WebSocketGraphQlTester
        .builder("ws://localhost:61686/graphql", client)
        .build()

    val query = "subscription TestSubscription(\$accessCode: String!) { testSubscription(accessCode: \$accessCode) }"
    val subscription = tester
        .document(query)
        .variable("accessCode", "testAccessCode")
        .extension("x-test-extension", "testExtension")
        .executeSubscription()
        .toFlux()

    StepVerifier
        .create(subscription)
        .expectNextMatches {
            it.path("testSubscription").entity(String::class.java).get() == ""
        }
        .thenCancel()
        .verify()
}

The test passes, but the server doesn't receive any extensions. It appears that this is caused by the AbstractGraphQlTesterBuilder which doesn't pass in extensions before executing its subscription.

[rstoyanchev]

Thanks, I've created a separate issue #1135 for that.