Testing Vert.x Applications

Adding dependencies

To test our Vert.x application, we’ll use the JUnit 5 framework. We’ll need the following two dependencies in our build.gradle.kts file:

dependencies {
...
testImplementation("org.junit.jupiter:junit-jupiter-
api:5.6.0")
testRuntimeOnly("org.junit.jupiter:junit-jupiter-
engine:5.6.0")
}

Writing tests in the AppTest.kt file:

Our first test will be located in the /src/test/kotlin/catsshelter/AppTest.kt file.

The basic structure of all the integration tests looks something like this:

@TestInstance(TestInstance.Lifecycle.PER_CLASS)
class ServerTest {
    private val vertx: Vertx = Vertx.vertx()
    
    @BeforeAll
    fun setup() {
        runBlocking {
           

...