*    corresponding call to [FrameCallback].
   */
  @Throws(IOException::class)
  fun processNextFrame() {
    check(!closed) { "closed" }

    readHeader()
    if (isControlFrame) {
      readControlFrame()
    } else {
      readMessageFrame()
    }
  }

  @Throws(IOException::class, ProtocolException::class)
  private fun readHeader() {
    if (receivedCloseFrame) throw IOException("closed")

        UnsupportedOperationException.class,
        () -> collection.addAll(MinimalCollection.of(e3(), e0())));
    expectUnchanged();
  }

  @CollectionFeature.Require({SUPPORTS_ADD, FAILS_FAST_ON_CONCURRENT_MODIFICATION})
  @CollectionSize.Require(absent = ZERO)
  public void testAddAllConcurrentWithIteration() {
    assertThrows(
        ConcurrentModificationException.class,
        () -> {

    assertThrows(NoSuchElementException.class, empty::next);
    assertThrows(UnsupportedOperationException.class, empty::remove);
  }

  public void testBroken() {
    Iterator<Object> broken = new BrokenAbstractSequentialIterator();
    assertTrue(broken.hasNext());
    // We can't retrieve even the known first element:
    assertThrows(SomeUncheckedException.class, broken::next);

  /**
   * A trust manager for Android applications that customize the trust manager.
   *
   * This class exploits knowledge of Android implementation details. This class is potentially
   * much faster to initialize than [BasicTrustRootIndex] because it doesn't need to load and
   * index trusted CA certificates.
   */
  internal data class CustomTrustRootIndex(
    private val trustManager: X509TrustManager,

 * heavy network interactions through {@link SmbTransport}.
 */
@ExtendWith(MockitoExtension.class)
public class SmbSessionTest {

    @Mock
    UniAddress addr;
    @Mock
    InetAddress inet;
    NtlmPasswordAuthentication auth;
    @Mock
    SmbTransport transport;

    // static helper that returns the mocked transport. The real class
    // performs several other operations, but for the purpose of the test

/**
 * Unit tests for the {@link Apply} goal class.
 * Tests the Apply-specific functionality including file modification behavior.
 */
@DisplayName("Apply")
class ApplyTest {

    private Apply applyGoal;
    private StrategyOrchestrator mockOrchestrator;

    @BeforeEach
    void setUp() {
        mockOrchestrator = mock(StrategyOrchestrator.class);
        applyGoal = new Apply(mockOrchestrator);
    }

 * overriding [.configureSocket].
 */
open class DelegatingSocketFactory(
  private val delegate: SocketFactory,
) : SocketFactory() {
  @Throws(IOException::class)
  override fun createSocket(): Socket {
    val socket = delegate.createSocket()
    return configureSocket(socket)
  }

  @Throws(IOException::class)
  override fun createSocket(
    host: String,
    port: Int,
  ): Socket {

    tester.testConstructors(PatternFilenameFilter.class, Visibility.PACKAGE);
    tester.testStaticMethods(PatternFilenameFilter.class, Visibility.PACKAGE); // currently none

    // The reason that we skip this method is discussed in a comment on the method.
    tester.ignore(PatternFilenameFilter.class.getMethod("accept", File.class, String.class));

 */
package gradlebuild.binarycompatibility

import org.junit.Test


class KotlinNullabilityChangesTest : AbstractBinaryCompatibilityTest() {

    @Test
    fun `from non-null returning to null returning is breaking`() {

        checkNotBinaryCompatibleKotlin(
            v1 = """
                class Source {
                    val someVal: String = "some"
                    var someVar: String = "some"

@GwtIncompatible
@J2ktIncompatible
@NullMarked
abstract class DummyProxy {

  /**
   * Returns a new proxy for {@code interfaceType}. Proxies of the same interface are equal to each
   * other if the {@link DummyProxy} instance that created the proxies are equal.
   */
  final <T> T newProxy(TypeToken<T> interfaceType) {
    Set<Class<?>> interfaceClasses = new LinkedHashSet<>();