Micronaut: test is failing with Page not foun, but the page can be accessed normally via browser

I was learning how to use Micronaut to create REST services but something I can't see is wrong with my tests settings and whatever I change in my code or in gradle I always get an annoying 'Page not found' error when running the tests but not when the application is running normally.

I have a class named App in the package br.com.myproject. In this class I have only the main method, as follows:

public static void main(final String[] args) {
    Micronaut.run(App.class);
}

In a subpackage br.com.myproject.controllers I have a class HelloController annotated with @Get("/hello") that should respond with a single "Hello, World!" text and it does normally when I access it through the browser:

package br.com.myproject.controllers;

@Controller("/hello")
public class HelloController {

    @Get("/")
    @Produces(MediaType.TEXT_PLAIN)
    public String index() {
        return "Hello, World!";
    }

}

In the tests directory, I have the class HelloControllerTest that should assure my /hello endpoint works properly. But unfortunately, my test is failing with a PageNotFound exception.

My class test is as follows:

package br.com.myproject.controllers;

public class HelloControllerTest {

    private static EmbeddedServer server;
    private static HttpClient client;

    @BeforeClass
    public static void setupServer() {
        server = ApplicationContext.run(EmbeddedServer.class);
        client = server
                .getApplicationContext()
                .createBean(HttpClient.class, server.getURL());
    }

    @AfterClass
    public static void stopServer() {
        if (client != null)
            client.stop();

        if (server != null)
            server.stop();
    }

    @Test
    public void testHello() throws Exception {
        HttpRequest<String> httpRequest = HttpRequest.GET("/hello");
        String body = client.toBlocking().retrieve(httpRequest);
        Assert.assertNotNull(body);
        Assert.assertEquals(body, "Hello, World!");
    }

}

And, for last, my gradle settings:

buildscript {
    repositories {
        jcenter()
    }
    dependencies {
        classpath 'com.github.jengelman.gradle.plugins:shadow:4.0.3'
        classpath 'io.spring.gradle:dependency-management-plugin:1.0.6.RELEASE'
        classpath 'net.ltgt.gradle:gradle-apt-plugin:0.15'
    }
}

plugins {
    id 'io.spring.dependency-management' version '1.0.6.RELEASE'
    id 'com.github.johnrengelman.shadow' version '4.0.3'
    id 'application'
    id 'java'
    id 'net.ltgt.apt-idea' version '0.15'
}

group 'br.com.myproject'
version '1.0.0-SNAPSHOT'

sourceCompatibility = 1.8

repositories {
    mavenLocal()
    mavenCentral()
    maven { url "https://plugins.gradle.org/m2/" }
}

dependencies {
    annotationProcessor 'io.micronaut:micronaut-inject-java:1.0.0'

    compile 'io.micronaut:micronaut-http-client:1.0.0'
    compile 'io.micronaut:micronaut-http-server-netty:1.0.0'
    compile 'io.micronaut:micronaut-inject:1.0.0'
    compile 'io.micronaut:micronaut-runtime:1.0.0'
    compileOnly 'io.micronaut:micronaut-inject-java:1.0.0'

    runtime 'ch.qos.logback:logback-classic:1.2.3'

    testCompile 'junit:junit:4.12'
    testCompile 'io.micronaut:micronaut-inject-java:1.0.0'
}

shadowJar {
    mergeServiceFiles()
}

mainClassName = 'br.com.myproject.App'

Both my tests and my gradle settings were written based on a code example in Micronaut documentation (this one). And somehow the tests in the code example works properly.

For instance, these are what I tried before asking here:

Changed the versions of dependencies to match versions in code example: it didn't work;
Put all classes under same package (br.com.myproject): it didn't work;
Copy/paste the gradle settings of the example code into my gradle settings and changing the package names properly: it didn't work;
Print out the URL used in the test just to check if it is correct: it is correct, but still 'Page not found' is thrown.

Everything works fine, however, when I run the application and type the address into the browser.

I have googled the keywords "micronaut test page not found" and similars but I found no useful articles that helped me to fix this error.

Just to mention: I am not completely familiar with gradle configuration and thus I suspect I might be lacking something here.

Does anyone have any idea what I may be missing?

I appreciate any tip.

Thanks =)

Solution

See the project at https://github.com/jeffbrown/jonathansouzanotfound. I have pasted your code directly into that project (and added missing import statements) and the test passes.

 $ ./gradlew clean test

> Task :compileJava

... 

BUILD SUCCESSFUL in 4s
5 actionable tasks: 5 executed