// @Ignore affects the Android test runner, which respects JUnit 4 annotations on JUnit 3 tests.
@SuppressWarnings("JUnit4ClassUsedInJUnit3")
public class CollectionAddTester<E> extends AbstractCollectionTester<E> {
  @CollectionFeature.Require(SUPPORTS_ADD)
  public void testAdd_supportedNotPresent() {
    assertTrue("add(notPresent) should return true", collection.add(e3()));
    expectAdded(e3());
  }

import junit.framework.TestCase;
import org.jspecify.annotations.NullUnmarked;

/**
 * Unit test for {@link Stopwatch}.
 *
 * @author Kevin Bourrillion
 */
@GwtCompatible
@NullUnmarked
public class StopwatchTest extends TestCase {

  private final FakeTicker ticker = new FakeTicker();
  private final Stopwatch stopwatch = new Stopwatch(ticker);

  public void testCreateStarted() {

import org.jspecify.annotations.Nullable;

/**
 * Tests for {@link UnicodeEscaper}.
 *
 * @author David Beaumont
 */
@GwtCompatible
@NullUnmarked
public class UnicodeEscaperTest extends TestCase {

  private static final String SMALLEST_SURROGATE =
      "" + Character.MIN_HIGH_SURROGATE + Character.MIN_LOW_SURROGATE;
  private static final String LARGEST_SURROGATE =

import junit.framework.TestCase;
import org.jspecify.annotations.NullUnmarked;

/**
 * Unit tests for {@link SipHashFunction}.
 *
 * @author Kurt Alfred Kluever
 */
@NullUnmarked
public class SipHashFunctionTest extends TestCase {

  // From https://131002.net/siphash/siphash24.c
  // k = 00 01 02 ...
  private static final long K0 = 0x0706050403020100L;
  private static final long K1 = 0x0f0e0d0c0b0a0908L;

@SuppressWarnings("JUnit4ClassUsedInJUnit3")
@IgnoreJRERequirement // We opt into library desugaring for our tests.
public class MapMergeTester<K, V> extends AbstractMapTester<K, V> {
  @MapFeature.Require(SUPPORTS_PUT)
  public void testAbsent() {
    assertEquals(
        "Map.merge(absent, value, function) should return value",
        v3(),
        getMap()

 *
 * <p>For a tiny bit more testing, see {@link FileBackedOutputStreamAndroidIncompatibleTest}.
 *
 * @author Chris Nokleberg
 */
@NullUnmarked
public class FileBackedOutputStreamTest extends IoTestCase {


  public void testThreshold() throws Exception {
    testThreshold(0, 100, true, false);
    testThreshold(10, 100, true, false);
    testThreshold(100, 100, true, false);

    }
  }

  /**
   * A char sink that encodes written characters with a charset and writes resulting bytes to this
   * byte sink.
   */
  private final class AsCharSink extends CharSink {

    private final Charset charset;

    private AsCharSink(Charset charset) {
      this.charset = checkNotNull(charset);
    }

    @Override

 *
 * @author Chris Nokleberg
 * @author Keith Bottner
 * @since 8.0
 */
@J2ktIncompatible
@GwtIncompatible
public final class LittleEndianDataOutputStream extends FilterOutputStream implements DataOutput {

  /**
   * Creates a {@code LittleEndianDataOutputStream} that wraps the given stream.
   *
   * @param out the stream to delegate to
   */

// @Ignore affects the Android test runner, which respects JUnit 4 annotations on JUnit 3 tests.
@SuppressWarnings("JUnit4ClassUsedInJUnit3")
public class CollectionAddTester<E> extends AbstractCollectionTester<E> {
  @CollectionFeature.Require(SUPPORTS_ADD)
  public void testAdd_supportedNotPresent() {
    assertTrue("add(notPresent) should return true", collection.add(e3()));
    expectAdded(e3());
  }

// @Ignore affects the Android test runner, which respects JUnit 4 annotations on JUnit 3 tests.
@SuppressWarnings("JUnit4ClassUsedInJUnit3")
public class ListAddAllAtIndexTester<E> extends AbstractListTester<E> {
  @ListFeature.Require(SUPPORTS_ADD_WITH_INDEX)
  @CollectionSize.Require(absent = ZERO)
  public void testAddAllAtIndex_supportedAllPresent() {
    assertTrue(