import java.nio.charset.Charset;
import junit.framework.TestCase;
import org.jspecify.annotations.NullUnmarked;

/**
 * Unit test for {@link Charsets}.
 *
 * @author Mike Bostock
 */
@GwtCompatible
@NullUnmarked
public class CharsetsTest extends TestCase {

  @J2ktIncompatible
  @GwtIncompatible // Non-UTF-8 Charset
  public void testUsAscii() {

import junit.framework.TestCase;
import org.jspecify.annotations.NullMarked;
import org.jspecify.annotations.Nullable;

/**
 * Tests for {@link Multisets#immutableEntry}.
 *
 * @author Mike Bostock
 */
@GwtCompatible
@NullMarked
public class MultisetsImmutableEntryTest extends TestCase {
  private static final @Nullable String NE = null;

import java.nio.charset.Charset;
import junit.framework.TestCase;
import org.jspecify.annotations.NullUnmarked;

/**
 * Unit test for {@link Charsets}.
 *
 * @author Mike Bostock
 */
@GwtCompatible
@NullUnmarked
public class CharsetsTest extends TestCase {

  @J2ktIncompatible
  @GwtIncompatible // Non-UTF-8 Charset
  public void testUsAscii() {

import junit.framework.TestCase;
import org.jspecify.annotations.NullMarked;
import org.jspecify.annotations.Nullable;

/**
 * Tests for {@link Multisets#immutableEntry}.
 *
 * @author Mike Bostock
 */
@GwtCompatible
@NullMarked
public class MultisetsImmutableEntryTest extends TestCase {
  private static final @Nullable String NE = null;

import java.util.Map.Entry;
import junit.framework.TestCase;
import org.jspecify.annotations.NullMarked;
import org.jspecify.annotations.Nullable;

/**
 * Tests for {@code AbstractMapEntry}.
 *
 * @author Mike Bostock
 */
@GwtCompatible
@NullMarked
public class AbstractMapEntryTest extends TestCase {
  private static final @Nullable String NK = null;
  private static final @Nullable Integer NV = null;

import java.io.Serializable;
import org.jspecify.annotations.Nullable;

/**
 * Utility class for converting between various ASCII case formats. Behavior is undefined for
 * non-ASCII input.
 *
 * @author Mike Bostock
 * @since 1.0
 */
@GwtCompatible
public enum CaseFormat {
  /**
   * Hyphenated variable naming convention, e.g., "lower-hyphen". This format is also colloquially
   * known as "kebab case".
   */

import java.util.Set;
import junit.framework.TestCase;
import org.jspecify.annotations.NullUnmarked;
import org.jspecify.annotations.Nullable;

/**
 * Tests for {@code Synchronized#map}.
 *
 * @author Mike Bostock
 */
@NullUnmarked
public class SynchronizedMapTest extends TestCase {
  public final Object mutex = new Object[0]; // something Serializable

  protected <K, V> Map<K, V> create() {

import java.util.Set;
import junit.framework.TestCase;
import org.jspecify.annotations.NullUnmarked;
import org.jspecify.annotations.Nullable;

/**
 * Tests for {@code Synchronized#map}.
 *
 * @author Mike Bostock
 */
@NullUnmarked
public class SynchronizedMapTest extends TestCase {
  public final Object mutex = new Object[0]; // something Serializable

  protected <K, V> Map<K, V> create() {

import java.io.Serializable;
import org.jspecify.annotations.Nullable;

/**
 * Utility class for converting between various ASCII case formats. Behavior is undefined for
 * non-ASCII input.
 *
 * @author Mike Bostock
 * @since 1.0
 */
@GwtCompatible
public enum CaseFormat {
  /**
   * Hyphenated variable naming convention, e.g., "lower-hyphen". This format is also colloquially
   * known as "kebab case".
   */

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

/**
 * Tests for {@code EnumHashBiMap}.
 *
 * @author Mike Bostock
 */
@J2ktIncompatible // EnumHashBiMap
@GwtCompatible
@NullUnmarked
public class EnumHashBiMapTest extends TestCase {
  private enum Currency {
    DOLLAR,
    FRANC,
    PESO,
    POUND,
    YEN