content: /*
   * Created on Jul 25, 2010
   *
   * 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.
   *
   * Copyright @2010-2013 the original author or authors.
   */
  package org.fest.assertions.core;
  
  import javax.annotation.Nonnull;
  
  /**
   * Assertions applicable to groups of values that can be enumerated (e.g. arrays, collections or strings.)
   *
   * @param <S> the type of the assertion objects.
   *
   * @author Yvonne Wang
   * @author Alex Ruiz
   */
  public interface EnumerableAssert<S> {
  
    /**
     * Verifies that the <em>actual</em> enumeration is {@code null} or empty.
     *
     * @return {@code this} the assertion object.
     * @throws AssertionError if the <em>actual</em> enumeration is not {@code null} or not empty.
     */
    S isNullOrEmpty();
  
    /**
     * Verifies that the <em>actual</em> enumeration is empty.
     *
     * @return {@code this} the assertion object.
     * @throws AssertionError if the <em>actual</em> enumeration is not empty.
     */
    S isEmpty();
  
    /**
     * Verifies that the <em>actual</em> enumeration is not empty.
     *
     * @return {@code this} assertion object.
     * @throws AssertionError if the <em>actual</em> enumeration is empty.
     */
    @Nonnull
    S isNotEmpty();
  
    /**
     * Verifies that the number of values in the <em>actual</em> enumeration is equal to the given one.
     *
     * @param expected the expected number of values in the <em>actual</em> enumeration.
     * @return {@code this} assertion object.
     * @throws AssertionError if the number of values of the <em>actual</em> enumeration is not equal to the given one.
     */
    @Nonnull
    S hasSize(int expected);
  }
  