Keep getting errors when running JUnit test on my http client - mockito

Question

I am creating a client to send requests to an API, and I am trying to write a Junit test but i keep getting this error.
Here is my client code which sends a request:
import io.netty.handler.codec.http.HttpResponse;
import io.vertx.core.AsyncResult;
import io.vertx.core.buffer.Buffer;
import io.vertx.core.json.JsonObject;
import io.vertx.core.logging.Logger;
import io.vertx.core.logging.LoggerFactory;
import io.vertx.ext.web.client.HttpRequest;
import io.vertx.ext.web.client.WebClient;
public class LoginCoreClient {
private WebClient webclient;
private String requestURL;
private static Logger logger = LoggerFactory.getLogger(LoginCoreClient.class);
public LoginCoreClient(WebClient webclient, String requestURL) {
this.webclient = webclient;
this.requestURL = requestURL;
}
public void invokeCore(JsonObject request, java.util.function.Consumer<JsonObject> func){
webclient.post(requestURL)
.putHeader("content-type", "application/json")
.sendJson(request, ar -> {
if (ar.succeeded()) {
logger.info("succeeded: " + ar.succeeded());
logger.info("statusCode: " + ar.result().statusCode());
logger.info("body: " + ar.result().body());
logger.info("headers: " + ar.result().headers());
JsonObject response = new JsonObject();
// populate it
func.accept(response);
} else {
logger.info("Executed: " + ar.cause());
}
});
}
}
Here is the test class that i am using to test that the correct response is being sent back:
import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.mockito.ArgumentMatchers.any;
import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.*;
import java.awt.List;
import javax.xml.ws.Response;
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.api.extension.ExtendWith;
import org.mockito.invocation.InvocationOnMock;
import org.mockito.stubbing.Answer;
import io.netty.util.concurrent.Future;
import io.vertx.core.Vertx;
import io.vertx.core.buffer.Buffer;
import io.vertx.core.json.JsonObject;
import io.vertx.ext.web.client.HttpRequest;
import io.vertx.ext.web.client.WebClient;
import io.vertx.junit5.VertxExtension;
import io.vertx.junit5.VertxTestContext;
#ExtendWith(VertxExtension.class)
public class LoginCoreTestTest {
private LoginCoreTest client;
//set up WebClient
private WebClient createMockWebClient(JsonObject mockResponse) {
WebClient mockWebClient = mock(WebClient.class);
HttpRequest<Buffer> mockRequest = mock(HttpRequest.class);
when(mockWebClient.post(any())).thenReturn(mockRequest);
when(mockRequest.putHeader(any(), any())).thenReturn(mockRequest);
doAnswer(new Answer() {
#Override
public Object answer(InvocationOnMock invocation) throws Throwable {
// TODO Auto-generated method stub
java.util.function.Consumer func = invocation.getArgument(1);
func.accept(mockResponse);
return null;
}
}).when(mockRequest).sendJson(any(), any());
return mockWebClient;
}
#Test
#DisplayName("Test response from client")
public void test() {
//request being sent
JsonObject request = new JsonObject().put("SSN", "123456789").put("Address", "123 main st").put("zip", "08888").put("dob", "012387");
//expected response
JsonObject response = new JsonObject().put("clientToken", "11oije311").put("clientID", "123ID");
//test setup
LoginCoreTest coreClient = new LoginCoreTest(createMockWebClient(response), "http://localhost:8080/core");
//test steps
coreClient.invokeCore(request, resp -> {
assertEquals(resp.getString("clientToken"), response.getString("clientToken"));
//end.finished();
});
}
}
And this is the error that i keep getting when trying to run the test:
Any idea why these errors are popping up when i try to run the test?

Answer 1

In Object answer(InvocationOnMock invocation) instead of
java.util.function.Consumer func = invocation.getArgument(1);
you should use
Handler<AsyncResult<HttpResponse<T>>> func = invocation.getArgument(1);