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Guava testlib is a set of java classes used for more convenient unit testing - particularly to assist the tests for Guava itself.

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/*
 * Copyright (C) 2008 The Guava Authors
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.google.common.collect.testing;

import com.google.common.annotations.GwtCompatible;

/**
 * Methods factored out so that they can be emulated differently in GWT.
 *
 * This class is emulated in GWT.
 *
 * @author Hayward Chan
 */
@GwtCompatible
class Platform {

  /**
   * Calls {@link Class#isInstance(Object)}.  Factored out so that it can be
   * emulated in GWT.
   *
   * This method always returns {@code true} in GWT.
   */
  static boolean checkIsInstance(Class clazz, Object obj) {
    return clazz.isInstance(obj);
  }

  static  T[] clone(T[] array) {
    return array.clone();
  }

  // Class.cast is not supported in GWT.  This method is a no-op in GWT.
  static void checkCast(Class clazz, Object obj) {
    clazz.cast(obj);
  }

  static String format(String template, Object... args) {
    return String.format(template, args);
  }

  static String classGetSimpleName(Class clazz) {
    return clazz.getSimpleName();
  }

  private Platform() {}
}