001 /* 002 * Created on Oct 17, 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 /** 019 * Assertion methods applicable to <code>{@link Number}</code>s. 020 * @param <T> the type of the "actual" value. 021 * 022 * @author Alex Ruiz 023 * @author Nicolas François 024 */ 025 public interface NumberAssert<T extends Number> { 026 027 /** 028 * Verifies that the actual value is equal to zero. 029 * @return this assertion object. 030 * @throws AssertionError if the actual value is {@code null}. 031 * @throws AssertionError if the actual value is not equal to zero. 032 */ 033 NumberAssert<T> isZero(); 034 035 /** 036 * Verifies that the actual value is not equal to zero. 037 * @return this assertion object. 038 * @throws AssertionError if the actual value is {@code null}. 039 * @throws AssertionError if the actual value is equal to zero. 040 */ 041 NumberAssert<T> isNotZero(); 042 043 /** 044 * Verifies that the actual value is positive. 045 * @return this assertion object. 046 * @throws AssertionError if the actual value is {@code null}. 047 * @throws AssertionError if the actual value is not positive. 048 */ 049 NumberAssert<T> isPositive(); 050 051 /** 052 * Verifies that the actual value is negative. 053 * @return this assertion object. 054 * @throws AssertionError if the actual value is {@code null}. 055 * @throws AssertionError if the actual value is not negative. 056 */ 057 NumberAssert<T> isNegative(); 058 059 /** 060 * Verifies that the actual value is non negative (positive or equal zero). 061 * @return {@code this} assertion object. 062 * @throws AssertionError if the actual value is {@code null}. 063 * @throws AssertionError if the actual value is not non negative. 064 */ 065 NumberAssert<T> isNotNegative(); 066 067 /** 068 * Verifies that the actual value is non positive (negative or equal zero). 069 * @return {@code this} assertion object. 070 * @throws AssertionError if the actual value is {@code null}. 071 * @throws AssertionError if the actual value is not non positive. 072 */ 073 NumberAssert<T> isNotPositive(); 074 075 }