IntegrationTest.java

package com.example.helloworld;

import com.example.helloworld.api.Saying;
import com.example.helloworld.core.Person;
import io.dropwizard.testing.ConfigOverride;
import io.dropwizard.testing.ResourceHelpers;
import io.dropwizard.testing.junit.DropwizardAppRule;
import org.junit.BeforeClass;
import org.junit.ClassRule;
import org.junit.Test;

import javax.ws.rs.client.Entity;
import javax.ws.rs.core.MediaType;
import java.io.File;
import java.io.IOException;
import java.util.Optional;

import static org.assertj.core.api.Assertions.assertThat;

public class IntegrationTest {

    private static final String TMP_FILE = createTempFile();
    private static final String CONFIG_PATH = ResourceHelpers.resourceFilePath("test-example.yml");

    @ClassRule
    public static final DropwizardAppRule<HelloWorldConfiguration> RULE = new DropwizardAppRule<>(
            HelloWorldApplication.class, CONFIG_PATH,
            ConfigOverride.config("database.url", "jdbc:h2:" + TMP_FILE));

    @BeforeClass
    public static void migrateDb() throws Exception {
        RULE.getApplication().run("db", "migrate", CONFIG_PATH);
    }

    private static String createTempFile() {
        try {
            return File.createTempFile("test-example", null).getAbsolutePath();
        } catch (IOException e) {
            throw new IllegalStateException(e);
        }
    }

    @Test
    public void testHelloWorld() throws Exception {
        final Optional<String> name = Optional.of("Dr. IntegrationTest");
        final Saying saying = RULE.client().target("http://localhost:" + RULE.getLocalPort() + "/hello-world")
                .queryParam("name", name.get())
                .request()
                .get(Saying.class);
        assertThat(saying.getContent()).isEqualTo(RULE.getConfiguration().buildTemplate().render(name));
    }

    @Test
    public void testPostPerson() throws Exception {
        final Person person = new Person("Dr. IntegrationTest", "Chief Wizard");
        final Person newPerson = RULE.client().target("http://localhost:" + RULE.getLocalPort() + "/people")
                .request()
                .post(Entity.entity(person, MediaType.APPLICATION_JSON_TYPE))
                .readEntity(Person.class);
        assertThat(newPerson.getId()).isNotNull();
        assertThat(newPerson.getFullName()).isEqualTo(person.getFullName());
        assertThat(newPerson.getJobTitle()).isEqualTo(person.getJobTitle());
    }
}