awkward-to-reproduce situations like 500 errors or slow-loading responses.


### Example

Use MockWebServer the same way that you use mocking frameworks like
[Mockito](https://github.com/mockito/mockito):

1. Script the mocks.
2. Run application code.
3. Verify that the expected requests were made.

Here's a complete example:

### Java
```java

import org.apache.maven.api.cli.mvnup.UpgradeOptions;
import org.apache.maven.cling.invoker.mvnup.UpgradeContext;

import static org.mockito.ArgumentMatchers.anyString;
import static org.mockito.Mockito.doAnswer;
import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.when;

/**
 * Utility class for creating test fixtures and reducing code duplication in tests.
 */
public final class TestUtils {

import static org.junit.jupiter.api.Assertions.assertFalse;
import static org.junit.jupiter.api.Assertions.assertNotNull;
import static org.junit.jupiter.api.Assertions.assertTrue;
import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.when;

/**
 * Unit tests for the {@link CompatibilityFixStrategy} class.
 * Tests Maven 4 compatibility fixes including duplicate dependency and plugin handling.
 */

import org.junit.jupiter.api.Test;
import org.mockito.Mockito;
import org.xmlunit.builder.DiffBuilder;
import org.xmlunit.diff.Diff;

import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.assertFalse;
import static org.junit.jupiter.api.Assertions.assertTrue;
import static org.mockito.Mockito.when;

class ConsumerPomArtifactTransformerTest {

    @Test

import static org.junit.jupiter.api.Assertions.assertNull;
import static org.junit.jupiter.api.Assertions.assertSame;
import static org.junit.jupiter.api.Assertions.assertTrue;
import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.when;

/**
 * UT for {@link ReverseTreeRepositoryListener}.
 */
class ReverseTreeRepositoryListenerTest {
    @Test
    void isLocalRepositoryArtifactTest() {

import org.codehaus.plexus.testing.PlexusTest;
import org.junit.jupiter.api.Test;

import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.when;

/**
 */
@PlexusTest
class DefaultLifecyclesTest {
    @Inject
    private DefaultLifecycles defaultLifeCycles;

    @Test
    void testDefaultLifecycles() {

import org.eclipse.aether.resolution.ArtifactDescriptorRequest;
import org.junit.jupiter.api.Test;
import org.mockito.ArgumentCaptor;

import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.assertTrue;
import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.verify;

class DefaultArtifactDescriptorReaderTest extends AbstractRepositoryTestCase {

    @Test

import org.eclipse.aether.repository.LocalRepository;
import org.eclipse.aether.repository.RemoteRepository;
import org.eclipse.aether.transfer.TransferListener;
import org.junit.jupiter.api.BeforeEach;
import org.mockito.Mockito;

import static org.codehaus.plexus.testing.PlexusExtension.getTestFile;

@PlexusTest
public abstract class AbstractRepositoryTestCase {
    @Inject
    protected RepositorySystem system;

    @Inject

import static org.apache.maven.lifecycle.internal.stub.LifecycleExecutionPlanCalculatorStub.TEST;
import static org.apache.maven.lifecycle.internal.stub.LifecycleExecutionPlanCalculatorStub.VALIDATE;
import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.when;

/**
 */
public class DefaultLifecyclesStub {
    public static DefaultLifecycles createDefaultLifecycles() throws ComponentLookupException {

import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.assertNotEquals;
import static org.junit.jupiter.api.Assertions.assertTrue;
import static org.mockito.Mockito.mock;

class RequestImplementationTest {

    @Test
    void testArtifactResolverRequestEquality() {
        Session session = mock(Session.class);