001 /* 002 * Created on Jul 25, 2010 003 * 004 * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with 005 * the License. You may obtain a copy of the License at 006 * 007 * http://www.apache.org/licenses/LICENSE-2.0 008 * 009 * Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on 010 * an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the 011 * specific language governing permissions and limitations under the License. 012 * 013 * Copyright @2010-2011 the original author or authors. 014 */ 015 package org.fest.assertions.core; 016 017 /** 018 * Assertions applicable to groups of values that can be enumerated (e.g. arrays, collections or strings.) 019 * @param <S> the "self" type of this assertion class. Please read 020 * "<a href="http://bit.ly/anMa4g" target="_blank">Emulating 'self types' using Java Generics to simplify fluent 021 * API implementation</a>" for more details. 022 * 023 * @author Yvonne Wang 024 * @author Alex Ruiz 025 */ 026 public interface EnumerableAssert<S> { 027 028 /** 029 * Verifies that the actual group of values is {@code null} or empty. 030 * @throws AssertionError if the actual group of values is not {@code null} or not empty. 031 */ 032 void isNullOrEmpty(); 033 034 /** 035 * Verifies that the actual group of values is empty. 036 * @throws AssertionError if the actual group of values is not empty. 037 */ 038 void isEmpty(); 039 040 /** 041 * Verifies that the actual group of values is not empty. 042 * @return {@code this} assertion object. 043 * @throws AssertionError if the actual group of values is empty. 044 */ 045 S isNotEmpty(); 046 047 /** 048 * Verifies that the number of values in the actual group is equal to the given one. 049 * @param expected the expected number of values in the actual group. 050 * @return {@code this} assertion object. 051 * @throws AssertionError if the number of values of the actual group is not equal to the given one. 052 */ 053 S hasSize(int expected); 054 }