HelloControllerTest.java

package com.myproject.project;

import io.micronaut.http.HttpStatus;
import io.micronaut.http.client.RxHttpClient;
import io.micronaut.runtime.server.EmbeddedServer;
import io.micronaut.test.annotation.MicronautTest;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Test;

import javax.inject.Inject;

import static org.junit.jupiter.api.Assertions.assertEquals;

@MicronautTest
public class HelloControllerTest {
    @Inject
    EmbeddedServer embeddedServer;

    @BeforeEach
    void setUp() {
        initMocks(this);
    }

    @Test
    public void testIndex() throws Exception {
        try (RxHttpClient client = embeddedServer.getApplicationContext().createBean(RxHttpClient.class, embeddedServer.getURL())) {
            assertEquals(HttpStatus.OK, client.toBlocking().exchange("/hello").status());
        }
    }

    void initMocks(Object o) {
        // unclear if this method is relevant
    }
}