*/
public class FeatureEnumTest extends TestCase {
  private static void assertGoodTesterAnnotation(Class<? extends Annotation> annotationClass) {
    assertNotNull(
        rootLocaleFormat("%s must be annotated with @TesterAnnotation.", annotationClass),
        annotationClass.getAnnotation(TesterAnnotation.class));
    final Retention retentionPolicy = annotationClass.getAnnotation(Retention.class);
    assertNotNull(

        // all, the definition of subscribers on a particular class is totally static
        throw new IllegalArgumentException(
            "missing event subscriber for an annotated method. Is " + listener + " registered?");
      }

      // don't try to remove the set if it's empty; that can't be done safely without a lock

```

////

//// tab | Python 3.8+

```Python
{!> ../../docs_src/security/tutorial001_an.py!}
```

////

//// tab | Python 3.8+ non-Annotated

/// tip

尽可能选择使用 `Annotated` 的版本。

///

```Python
{!> ../../docs_src/security/tutorial001.py!}
```

////

## 运行

/// info | "说明"

  /**
   * Tests that {@code cls} properly checks null on all constructor and method parameters that
   * aren't annotated nullable (according to the rules of {@link NullPointerTester}). In details:
   *
   * <ul>
   *   <li>All non-private static methods are checked such that passing null for any parameter
   *       that's not annotated nullable should throw {@link NullPointerException}.

    return type.getSimpleName() + '@' + i;
  }

  /**
   * Annotates a method to be the instance generator of a certain type. The return type is the
   * generated type. The method parameters correspond to the generated type's type parameters. For
   * example, if the annotated method returns {@code Map<K, V>}, the method signature should be:
   * {@code Map<K, V> generateMap(K key, V value)}.
   */

import org.checkerframework.checker.nullness.qual.Nullable;

/**
 * Tester of subtyping relationships between two types.
 *
 * <p>Tests should inherit from this class, and declare subtyping relationship with public methods
 * annotated by {@link TestSubtype}.
 *
 * <p>These declaration methods rely on Java static type checking to make sure what we want to
 * assert as subtypes are really subtypes according to javac. For example:
 *
 * <pre>{@code

////

//// tab | Python 3.8+

```Python hl_lines="6  12-13"
{!> ../../docs_src/settings/app02_an/main.py!}
```

////

//// tab | Python 3.8+ 非注解版本

/// tip

如果可能，请尽量使用 `Annotated` 版本。

///

```Python hl_lines="5  11-12"
{!> ../../docs_src/settings/app02/main.py!}
```

////

/// tip

我们稍后会讨论 `@lru_cache`。

目前，您可以将 `get_settings()` 视为普通函数。

  }

  public void testNulls() {
    /*
     * Don't bother testing. All non-primitive parameters are used only to construct error messages.
     * We never want to pass null for them, so we haven't annotated them to say that null is
     * allowed. But at the same time, it seems wasteful to bother inserting the checkNotNull calls
     * that NullPointerTester wants.
     *

      .selectors(selectors)
      .build()
  return request
}

/**
 * Flattens a test filter into a list of specific test descriptors, usually individual method in a
 * test class annotated with @Test.
 */
fun findTests(selectors: List<DiscoverySelector>): List<TestDescriptor> {
  val request: LauncherDiscoveryRequest = buildRequest(selectors)
  val testEngine = buildTestEngine()

    return type.getSimpleName() + '@' + i;
  }

  /**
   * Annotates a method to be the instance generator of a certain type. The return type is the
   * generated type. The method parameters correspond to the generated type's type parameters. For
   * example, if the annotated method returns {@code Map<K, V>}, the method signature should be:
   * {@code Map<K, V> generateMap(K key, V value)}.
   */