Check string in gatling simulation - scala

Question

Trying to check if a string exists on the body. Similar to checking status which is .check(status.is(200)). I want to check for string as well. tried .check(bodyString.is("greeting")) but got an error:
val scn = scenario("GreetingPages")
.during(testTimeSecs) {
exec(
http ("greeting")
.get("/greeting")
.check(status.is(200))
.check(bodyString.is("Greeting"))
).pause(minWaitMs,maxWaitMs)
.exec(
http("greeting1")
.get("/greeting1")
.check(status.is(200))
.check(bodyString.is("Greeting1"))
).pause(minWaitMs,maxWaitMs)
.exec(
http("Third page")
.get("/greeting2")
.check(status.is(200))
.check(bodyString.is("Greeting2"))
).pause(minWaitMs,maxWaitMs)
}
---- Errors --------------------------------------------------------------------
bodyString.find.is(Greeting), but actually found {"message":"G 9 (47.37%)
reeting"}
bodyString.find.is(Greeting1), but actually found {"message":" 5 (26.32%)
Greeting1"}
bodyString.find.is(Greeting2), but actually found {"message":" 5 (26.32%)
Greeting2"}

Answer 1

The reason is the bodyString return the full response body, as it described in the documentation.
You could use in matcher (you can see the implementation here - look for InMatcher[A], but it won't work because you need to switch expected.contains(actualValue) with expected.contains(expected)
I suggest you implement your own MyOwnInMatcher:
class MyOwnInMatcher[A](expected: Seq[A]) extends Matcher[A] {
def name: String = "customIn"
protected def doMatch(actual: Option[A]): Validation[Option[A]] = actual match {
case Some(actualValue) =>
if (expected.contains(actualValue))
actual.success
else
s"found $actualValue".failure
case _ => Validator.FoundNothingFailure
}
}
and use it:
.check(jsonPath("$.message").validate(customIn("Greeting")))), which checks if "Greeting" exists in the message attribute of the json response body.