001 /* 002 * Created on Oct 20, 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.internal; 016 017 import org.fest.assertions.core.AssertionInfo; 018 import org.fest.util.ComparisonStrategy; 019 020 /** 021 * Base class of reusable assertions for numbers. 022 * 023 * @author Joel Costigliola 024 * @author Nicolas François 025 */ 026 public abstract class Numbers<NUMBER extends Comparable<NUMBER>> extends Comparables { 027 028 public Numbers() { 029 super(); 030 } 031 032 public Numbers(ComparisonStrategy comparisonStrategy) { 033 super(comparisonStrategy); 034 } 035 036 protected abstract NUMBER zero(); 037 038 /** 039 * Asserts that the actual value is equal to zero.<br> 040 * It does not rely on the custom comparisonStrategy (if one is set). 041 * @param info contains information about the assertion. 042 * @param actual the actual value. 043 * @throws AssertionError if the actual value is {@code null}. 044 * @throws AssertionError if the actual value is not equal to zero. 045 */ 046 public void assertIsZero(AssertionInfo info, NUMBER actual) { 047 assertEqualByComparison(info, actual, zero()); 048 } 049 050 /** 051 * Asserts that the actual value is not equal to zero.<br> 052 * It does not rely on the custom comparisonStrategy (if one is set). 053 * @param info contains information about the assertion. 054 * @param actual the actual value. 055 * @throws AssertionError if the actual value is {@code null}. 056 * @throws AssertionError if the actual value is equal to zero. 057 */ 058 public void assertIsNotZero(AssertionInfo info, NUMBER actual) { 059 assertNotEqualByComparison(info, actual, zero()); 060 } 061 062 /** 063 * Asserts that the actual value is negative. 064 * @param info contains information about the assertion. 065 * @param actual the actual value. 066 * @throws AssertionError if the actual value is {@code null}. 067 * @throws AssertionError if the actual value is not negative: it is either equal to or greater than zero. 068 */ 069 public void assertIsNegative(AssertionInfo info, NUMBER actual) { 070 assertLessThan(info, actual, zero()); 071 } 072 073 /** 074 * Asserts that the actual value is positive. 075 * @param info contains information about the assertion. 076 * @param actual the actual value. 077 * @throws AssertionError if the actual value is {@code null}. 078 * @throws AssertionError if the actual value is not positive: it is either equal to or less than zero. 079 */ 080 public void assertIsPositive(AssertionInfo info, NUMBER actual) { 081 assertGreaterThan(info, actual, zero()); 082 } 083 084 /** 085 * Asserts that the actual value is not negative. 086 * @param info contains information about the assertion. 087 * @param actual the actual value. 088 * @throws AssertionError if the actual value is {@code null}. 089 * @throws AssertionError if the actual value is negative. 090 */ 091 public void assertIsNotNegative(AssertionInfo info, NUMBER actual) { 092 assertGreaterThanOrEqualTo(info, actual, zero()); 093 } 094 095 /** 096 * Asserts that the actual value is not positive. 097 * @param info contains information about the assertion. 098 * @param actual the actual value. 099 * @throws AssertionError if the actual value is {@code null}. 100 * @throws AssertionError if the actual value is positive. 101 */ 102 public void assertIsNotPositive(AssertionInfo info, NUMBER actual) { 103 assertLessThanOrEqualTo(info, actual, zero()); 104 } 105 106 }