import java.lang.reflect.InvocationHandler;
import java.lang.reflect.Proxy;

/**
 * Static utilities relating to Java reflection.
 *
 * @since 12.0
 */
@ElementTypesAreNonnullByDefault
public final class Reflection {

  /**
   * Returns the package name of {@code clazz} according to the Java Language Specification (section

import java.util.Map;
import junit.framework.TestCase;

/** Tests for {@link Reflection} */
public class ReflectionTest extends TestCase {

  public void testGetPackageName() throws Exception {
    assertEquals("java.lang", Reflection.getPackageName(Iterable.class));
    assertEquals("java", Reflection.getPackageName("java.MyType"));
    assertEquals("java.lang", Reflection.getPackageName(Iterable.class.getName()));

import java.util.Map;
import junit.framework.TestCase;

/** Tests for {@link Reflection} */
public class ReflectionTest extends TestCase {

  public void testGetPackageName() throws Exception {
    assertEquals("java.lang", Reflection.getPackageName(Iterable.class));
    assertEquals("java", Reflection.getPackageName("java.MyType"));
    assertEquals("java.lang", Reflection.getPackageName(Iterable.class.getName()));

  private static List<String> newDelegatingList(List<String> delegate) {
    return Reflection.newProxy(List.class, new DelegatingInvocationHandler(delegate));
  }

  @SuppressWarnings("unchecked") // proxy of List<String>
  private static List<String> newDelegatingListWithEquals(List<String> delegate) {
    return Reflection.newProxy(List.class, new DelegatingInvocationHandlerWithEquals(delegate));
  }

  private static List<String> newDelegatingList(List<String> delegate) {
    return Reflection.newProxy(List.class, new DelegatingInvocationHandler(delegate));
  }

  @SuppressWarnings("unchecked") // proxy of List<String>
  private static List<String> newDelegatingListWithEquals(List<String> delegate) {
    return Reflection.newProxy(List.class, new DelegatingInvocationHandlerWithEquals(delegate));
  }

      }
    }
    expectUnchanged();
  }

  @J2ktIncompatible
  @GwtIncompatible // reflection
  public static Method getContainsEntryWithIncomparableKeyMethod() {
    return Helpers.getMethod(MapEntrySetTester.class, "testContainsEntryWithIncomparableKey");
  }

  @J2ktIncompatible
  @GwtIncompatible // reflection
  public static Method getContainsEntryWithIncomparableValueMethod() {

    assertEquals(Prepender.class, Prepender.constructor().getReturnType().getType());
  }

  private static class WithConstructorAndTypeParameter<T> {
    @SuppressWarnings("unused") // by reflection
    <X> WithConstructorAndTypeParameter() {}
  }

  public void testConstructor_returnType_hasTypeParameter() throws Exception {
    Class<WithConstructorAndTypeParameter> type = WithConstructorAndTypeParameter.class;

    @SuppressWarnings("unused") // Called by reflection
    private void privateMethod() {}

    @SuppressWarnings("unused") // Called by reflection
    void packagePrivateMethod() {}

    @SuppressWarnings("unused") // Called by reflection
    protected void protectedMethod() {}

    @SuppressWarnings("unused") // Called by reflection
    public void publicMethod() {}
  }

      }
    }
    expectUnchanged();
  }

  @J2ktIncompatible
  @GwtIncompatible // reflection
  public static Method getContainsEntryWithIncomparableKeyMethod() {
    return Helpers.getMethod(MapEntrySetTester.class, "testContainsEntryWithIncomparableKey");
  }

  @J2ktIncompatible
  @GwtIncompatible // reflection
  public static Method getContainsEntryWithIncomparableValueMethod() {

   * the other. Thus, we say the bug is in add(), which fails to support null.
   */
  @J2ktIncompatible
  @GwtIncompatible // reflection
  public static Method getAddNullSupportedMethod() {
    return Helpers.getMethod(CollectionAddTester.class, "testAdd_nullSupported");
  }

  /**