It is also built to work as a future reference so you can come back and see exactly what you need.

## Run the code { #run-the-code }

All the code blocks can be copied and used directly (they are actually tested Python files).

To run any of the examples, copy the code to a file `main.py`, and start `fastapi dev` with:

<div class="termy">

```console

/**
 * Unit test for {@link Files}.
 *
 * <p>Some methods are tested in separate files:
 *
 * <ul>
 *   <li>{@link Files#fileTraverser()} is tested in {@link FilesFileTraverserTest}.
 *   <li>{@link Files#createTempDir()} is tested in {@link FilesCreateTempDirTest}.
 * </ul>
 *
 * @author Chris Nokleberg
 */

@SuppressWarnings("InlineMeInliner") // many tests of deprecated methods
@NullUnmarked

    }

    public void test_stackTrace() {
        // Test that stack trace is properly captured
        ThemeException exception = new ThemeException("Stack trace test");

        assertNotNull(exception.getStackTrace());
        assertTrue(exception.getStackTrace().length > 0);

        // Verify that this test method appears in the stack trace
        boolean foundTestMethod = false;

  @GwtIncompatible // reflection
  public void testNulls() throws Exception {
    NullPointerTester tester = new NullPointerTester();
    tester.testAllPublicStaticMethods(ImmutableSetMultimap.class);
    tester.ignore(ImmutableSetMultimap.class.getMethod("get", Object.class));
    tester.testAllPublicInstanceMethods(ImmutableSetMultimap.of());
    tester.testAllPublicInstanceMethods(ImmutableSetMultimap.of("a", 1));
  }

{* ../../docs_src/settings/app02_an_py39/main.py hl[17,19:21] *}

### Einstellungen und Tests

Dann wäre es sehr einfach, beim Testen ein anderes Einstellungsobjekt bereitzustellen, indem man eine Abhängigkeitsüberschreibung für `get_settings` erstellt:

{* ../../docs_src/settings/app02/test_main.py hl[9:10,13,21] *}

import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Nested;
import org.junit.jupiter.api.Test;

import jcifs.CIFSContext;
import jcifs.Configuration;
import jcifs.NameServiceClient;
import jcifs.NetbiosAddress;
import jcifs.util.Hexdump;

/**
 * Comprehensive test suite for Type2Message NTLM authentication message.
 * Tests all constructors, parsing, and serialization functionality.
 */

import com.google.common.testing.SerializableTester;
import java.io.Serializable;
import junit.framework.Test;
import junit.framework.TestCase;
import junit.framework.TestSuite;
import org.jspecify.annotations.NullMarked;

/**
 * Unit test for {@link HashMultiset}.
 *
 * @author Kevin Bourrillion
 * @author Jared Levy
 */
@GwtCompatible
@NullMarked

          .buildOrThrow();

  public void testNulls() {
    NullPointerTester tester =
        new NullPointerTester().setDefault(String.class, "HmacMD5").setDefault(Key.class, MD5_KEY);
    tester.testAllPublicConstructors(MacHashFunction.class);
    tester.testAllPublicInstanceMethods(new MacHashFunction("HmacMD5", MD5_KEY, "toString"));
  }

  public void testHashing() throws Exception {

        assertEquals(start1, start2, "Start time should remain constant");
        assertNotNull(start1, "Start time should not be null");
    }

    @Nested
    @DisplayName("Time consistency tests")
    class TimeConsistencyTests {

        @Test
        @DisplayName("Current time should be after start time")
        void testCurrentTimeAfterStart() {
            Instant now = MonotonicClock.now();

import java.util.Map.Entry;
import junit.framework.Test;
import junit.framework.TestCase;
import junit.framework.TestSuite;
import org.jspecify.annotations.NullUnmarked;

/**
 * Unit test of {@link MutableClassToInstanceMap}.
 *
 * @author Kevin Bourrillion
 */
@NullUnmarked
public class MutableClassToInstanceMapTest extends TestCase {
  @AndroidIncompatible // test-suite builders
  public static Test suite() {