Spring Cloud Contract

BaseTests.java

@SpringBootTest (classes = ProviderApplication.class)
class BaseTests {

	@Autowired
	private CustomerRestController customerRestController;

	@MockBean
	private CustomerRepository customerRepository;

	@BeforeEach
	public void before() {
		when(this.customerRepository.findAll())
				.thenReturn(Arrays.asList(new Customer(1L, "Test 01"), new Customer(2L, "Test 02")));
		RestAssuredMockMvc.standaloneSetup(this.customerRestController);
	}

}

CustomerGatewayTest.java

@SpringBootTest(webEnvironment= WebEnvironment.NONE)
@AutoConfigureStubRunner(ids = "com.example:provider:+:8081", stubsMode = StubRunnerProperties.StubsMode.LOCAL)
public class CustomerGatewayTest {

    @Autowired
    private CustomerGateway gateway;

    @Test
    void getAllCustomers() {
        List<Customer> customers = this.gateway.getAllCustomers();
        BDDAssertions.then(customers).size().isEqualTo(2);
        BDDAssertions.then(customers.iterator().next().getId()).isEqualTo(1L);
        BDDAssertions.then(customers.iterator().next().getName()).isEqualTo("Test 01");
    }
}

first-contract.groovy

import org.springframework.cloud.contract.spec.Contract
import org.springframework.http.HttpHeaders
import org.springframework.http.MediaType

Contract.make {
    description "should return all customers"
    request {
        url "/customers"
        method GET()
    }
    response {
        status 200
        headers {
            header(HttpHeaders.CONTENT_TYPE, MediaType.APPLICATION_JSON_VALUE)
        }
        body([[id: 1L, name: "Test 01"], [id: 2L, name: "Test 02"]])
    }
}