@SpringBootTest(classes = MyAppApplication.class, webEnvironment = WebEnvironment.RANDOM_PORT)
@ActiveProfiles("test")
public abstract class AbstractIntegrationTest {

    static {
        PostgreSQLContainer postgreSQLContainer = new PostgreSQLContainer().withPassword("password")
                .withUsername("postgres").withDatabaseName("MyApp");
        postgreSQLContainer.start();

        System.setProperty("spring.datasource.url", postgreSQLContainer.getJdbcUrl());
        System.setProperty("spring.datasource.password", postgreSQLContainer.getPassword());
        System.setProperty("spring.datasource.username", postgreSQLContainer.getUsername());

    }

public class moreTests extends AbstractIntegrationTest {

    TestRestTemplate restTemplate = new TestRestTemplate("my-user", "password");
    HttpHeaders headers = new HttpHeaders();

    @Test
    public void SimpleHealthCheck() {
        HttpEntity<String> entity = new HttpEntity<String>(null, headers);
        ResponseEntity<String> response = restTemplate.exchange(
                createURLWithPort("/api/v1/healthcheck"),
                HttpMethod.GET, entity, String.class);
        assertThat(response.getStatusCode(), equalTo(HttpStatus.OK));
    }

    @Test
    public void GetInst() {
        HttpEntity<String> entity = new HttpEntity<String>(null, headers);
        ResponseEntity<String> response = restTemplate.exchange(
                createURLWithPort("/api/v1/institutions"),
                HttpMethod.GET, entity, String.class);
        assertThat(response.getStatusCode(), equalTo(HttpStatus.OK));
    }