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 */ 025 public abstract class Numbers<NUMBER extends Comparable<NUMBER>> extends Comparables { 026 027 public Numbers() { 028 super(); 029 } 030 031 public Numbers(ComparisonStrategy comparisonStrategy) { 032 super(comparisonStrategy); 033 } 034 035 protected abstract NUMBER zero(); 036 037 /** 038 * Asserts that the actual value is equal to zero.<br> 039 * It does not rely on the custom comparisonStrategy (if one is set). 040 * @param info contains information about the assertion. 041 * @param actual the actual value. 042 * @throws AssertionError if the actual value is {@code null}. 043 * @throws AssertionError if the actual value is not equal to zero. 044 */ 045 public void assertIsZero(AssertionInfo info, NUMBER actual) { 046 assertEqualByComparison(info, actual, zero()); 047 } 048 049 /** 050 * Asserts that the actual value is not equal to zero.<br> 051 * It does not rely on the custom comparisonStrategy (if one is set). 052 * @param info contains information about the assertion. 053 * @param actual the actual value. 054 * @throws AssertionError if the actual value is {@code null}. 055 * @throws AssertionError if the actual value is equal to zero. 056 */ 057 public void assertIsNotZero(AssertionInfo info, NUMBER actual) { 058 assertNotEqualByComparison(info, actual, zero()); 059 } 060 061 /** 062 * Asserts that the actual value is negative. 063 * @param info contains information about the assertion. 064 * @param actual the actual value. 065 * @throws AssertionError if the actual value is {@code null}. 066 * @throws AssertionError if the actual value is not negative: it is either equal to or greater than zero. 067 */ 068 public void assertIsNegative(AssertionInfo info, NUMBER actual) { 069 assertLessThan(info, actual, zero()); 070 } 071 072 /** 073 * Asserts that the actual value is positive. 074 * @param info contains information about the assertion. 075 * @param actual the actual value. 076 * @throws AssertionError if the actual value is {@code null}. 077 * @throws AssertionError if the actual value is not positive: it is either equal to or less than zero. 078 */ 079 public void assertIsPositive(AssertionInfo info, NUMBER actual) { 080 assertGreaterThan(info, actual, zero()); 081 } 082 083 }