## Пример { #example }

В качестве простого примера, давайте рассмотрим файловую структуру, схожую с описанной в [Большие приложения](../tutorial/bigger-applications.md){.internal-link target=_blank} и [Тестирование](../tutorial/testing.md){.internal-link target=_blank}:

```
.
├── app
│   ├── __init__.py
│   ├── main.py
│   └── test_main.py
```

Файл `main.py`:

{* ../../docs_src/async_tests/app_a_py39/main.py *}

/**
 * Test class for CreateContextRequest interface
 */
@DisplayName("CreateContextRequest Tests")
class CreateContextRequestTest {

    /**
     * Test implementation of CreateContextRequest for testing purposes
     */
    static class TestCreateContextRequest implements CreateContextRequest {
        private byte[] name;
        private byte[] data;
        private int encodedSize;

 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.google.common.collect.testing;

import com.google.common.annotations.GwtCompatible;
import com.google.common.annotations.GwtIncompatible;
import com.google.common.annotations.J2ktIncompatible;
import junit.framework.TestCase;

 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.google.common.collect.testing;

import com.google.common.annotations.GwtCompatible;
import com.google.common.annotations.GwtIncompatible;
import com.google.common.annotations.J2ktIncompatible;
import junit.framework.TestCase;

    @BeforeEach
    void setUp() {
        MockitoAnnotations.openMocks(this);
        context = new TestAbstractCIFSContext(mockCredentials);
    }

    // Concrete implementation for testing AbstractCIFSContext
    private static class TestAbstractCIFSContext extends AbstractCIFSContext {
        private final Credentials defaultCreds;
        private boolean closeCalled = false;

import jcifs.internal.Request;

/**
 * Tests for SmbTreeInternal interface behavior via mocks.
 * Since this is an interface, we validate its public API contract
 * through interaction testing and generic type usage.
 */
@ExtendWith(MockitoExtension.class)
class SmbTreeInternalTest {

    @Mock
    private SmbTreeInternal tree;

    @Mock
    private CIFSContext context;

    @Mock

import java.nio.file.Path;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import eu.maveniverse.maven.mimir.testing.MimirInfuser;
import org.apache.maven.api.cli.Invoker;
import org.apache.maven.api.cli.InvokerException;
import org.apache.maven.api.cli.Parser;
import org.apache.maven.api.cli.ParserRequest;

      super(message);
    }

    public Throwable getAntecedent() {
      return antecedent;
    }
  }

  @SuppressWarnings("unused") // we're testing that they're not used
  public static final class ExceptionWithSomePrivateConstructors extends Exception {
    private ExceptionWithSomePrivateConstructors(String a) {}

import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.verify;
import static org.mockito.Mockito.verifyNoMoreInteractions;
import static org.mockito.Mockito.when;

import com.google.common.testing.NullPointerTester;
import java.io.ByteArrayInputStream;
import java.util.Arrays;
import junit.framework.TestCase;
import org.jspecify.annotations.NullUnmarked;

/**
 * Tests for {@link HashingInputStream}.
 *

import java.util.concurrent.atomic.AtomicBoolean;
import java.util.concurrent.atomic.AtomicInteger;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * Mock witness service for integration testing.
 * Simulates a basic witness service that can accept registrations
 * and send notifications.
 */
public class MockWitnessService implements AutoCloseable {