Ktor: testing REST endpoints using Spek/KotlinTest instad of JUnit Test Class - ktor

Question

I have a simple hello world Ktor app:
fun Application.testMe() {
intercept(ApplicationCallPipeline.Call) {
if (call.request.uri == "/")
call.respondText("Hello")
}
}
With JUnit test class I can write the test for it, as given in its documentation; as following:
class ApplicationTest {
#Test fun testRequest() = withTestApplication(Application::testMe) {
with(handleRequest(HttpMethod.Get, "/")) {
assertEquals(HttpStatusCode.OK, response.status())
assertEquals("Hello", response.content)
}
with(handleRequest(HttpMethod.Get, "/index.html")) {
assertFalse(requestHandled)
}
}
}
However, I want to do a unit test in Spek or KotlinTest, without the help of JUnit, similar to the way I do it in ScalaTest/Play; in a more declarative way:
Send a FakeRequest to the route (i.e., /) during a test.
Get the content of the page, and check for the string "hello".
The question is can I write the above test in a more declarative way in KotlinTest or Spek?

Answer 1

First of all, follow spek setup guide with JUnit 5
Then you can simply declare you specifications like the following
object HelloApplicationSpec: Spek({
given("an application") {
val engine = TestApplicationEngine(createTestEnvironment())
engine.start(wait = false) // for now we can't eliminate it
engine.application.main() // our main module function
with(engine) {
on("index") {
it("should return Hello World") {
handleRequest(HttpMethod.Get, "/").let { call ->
assertEquals("Hello, World!", call.response.content)
}
}
it("should return 404 on POST") {
handleRequest(HttpMethod.Post, "/", {
body = "HTTP post body"
}).let { call ->
assertFalse(call.requestHandled)
}
}
}
}
}
})
Here is my build.gradle (simplified)
buildscript {
dependencies {
classpath 'org.junit.platform:junit-platform-gradle-plugin:1.0.3'
}
repositories {
jcenter()
}
}
repositories {
jcenter()
maven { url "http://dl.bintray.com/jetbrains/spek" }
}
apply plugin: 'org.junit.platform.gradle.plugin'
junitPlatform {
filters {
engines {
include 'spek'
}
}
}
dependencies {
testCompile 'org.jetbrains.spek:spek-api:1.1.5'
testRuntime 'org.jetbrains.spek:spek-junit-platform-engine:1.1.5'
testCompile "io.ktor:ktor-server-test-host:$ktor_version"
}