import junit.framework.AssertionFailedError;
import junit.framework.TestCase;

/**
 * Base class for JSR166 Junit TCK tests. Defines some constants, utility methods and classes, as
 * well as a simple framework for helping to make sure that assertions failing in generated threads
 * cause the associated test that generated them to itself fail (which JUnit does not otherwise
 * arrange). The rules for creating such tests are:
 *

  private static final int NUM_THREADS = 10; // make a param?

  // simple interface to wrap our two implementations.
  interface ExecutionListWrapper {
    void add(Runnable runnable, Executor executor);

    void execute();
    /** Returns the underlying implementation, useful for the Footprint benchmark. */
    Object getImpl();
  }

  enum Impl {
    NEW {
      @Override
      ExecutionListWrapper newExecutionList() {

 * NullPointerException} or {@link UnsupportedOperationException} whenever null is passed to a
 * parameter whose declaration or type isn't annotated with an annotation with the simple name
 * {@code Nullable}, {@code CheckForNull}, {@code NullableType}, or {@code NullableDecl}.
 *
 * <p>The tested methods and constructors are invoked -- each time with one parameter being null and

    builder.setSafeRange(' ', '~');
    assertEquals("The_Quick_Brown_Fox_", builder.build().escape("The Quick Brown Fox!"));
  }

  public void testBuilderCreatesIndependentEscapers() {
    // Set up a simple builder and create the first escaper.
    Escapers.Builder builder = Escapers.builder();
    builder.setSafeRange('a', 'z');
    builder.setUnsafeReplacement("X");
    builder.addEscape(' ', "_");

    this.remaining = remainingFutures;
  }

  final Set<Throwable> getOrInitSeenExceptions() {
    /*
     * The initialization of seenExceptions has to be more complicated than we'd like. The simple
     * approach would be for each caller CAS it from null to a Set populated with its exception. But
     * there's another race: If the first thread fails with an exception and a second thread

    asByteSource(from).copyTo(to);
  }

  /**
   * Returns a {@code URL} pointing to {@code resourceName} if the resource is found using the
   * {@linkplain Thread#getContextClassLoader() context class loader}. In simple environments, the
   * context class loader will find resources from the class path. In environments where different
   * threads can have different class loaders, for example app servers, the context class loader

 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.google.common.collect;

import com.google.common.annotations.GwtCompatible;

/** Simple derived class to verify that we handle generics correctly. */
@GwtCompatible
class Derived extends Base {
  public Derived(String s) {
    super(s);
  }

  private static final long serialVersionUID = 0;

 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.google.common.collect;

import com.google.common.annotations.GwtCompatible;

/** Simple derived class to verify that we handle generics correctly. */
@GwtCompatible
class Derived extends Base {
  public Derived(String s) {
    super(s);
  }

  private static final long serialVersionUID = 0;

        return false;
      }

      EndpointPair<?> other = (EndpointPair<?>) obj;
      if (isOrdered() != other.isOrdered()) {
        return false;
      }

      // Equivalent to the following simple implementation:
      // boolean condition1 = nodeU().equals(other.nodeU()) && nodeV().equals(other.nodeV());
      // boolean condition2 = nodeU().equals(other.nodeV()) && nodeV().equals(other.nodeU());

 *   }
 * } else {
 *   // do other things since the monitor was not available
 * }
 * }</pre>
 *
 * <h2>Comparison with {@code synchronized} and {@code ReentrantLock}</h2>
 *
 * <p>The following examples show a simple threadsafe holder expressed using {@code synchronized},
 * {@link ReentrantLock}, and {@code Monitor}.
 *
 * <h3>{@code synchronized}</h3>
 *