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 * Assertion methods applicable to <code>{@link Number}</code>s.
019 * @param <T> the type of the "actual" value.
020 *
021 * @author Alex Ruiz
022 */
023 public interface NumberAssert<T extends Number> {
024
025 /**
026 * Verifies that the actual value is equal to zero.
027 * @return this assertion object.
028 * @throws AssertionError if the actual value is {@code null}.
029 * @throws AssertionError if the actual value is not equal to zero.
030 */
031 NumberAssert<T> isZero();
032
033 /**
034 * Verifies that the actual value is not equal to zero.
035 * @return this assertion object.
036 * @throws AssertionError if the actual value is {@code null}.
037 * @throws AssertionError if the actual value is equal to zero.
038 */
039 NumberAssert<T> isNotZero();
040
041 /**
042 * Verifies that the actual value is positive.
043 * @return this assertion object.
044 * @throws AssertionError if the actual value is {@code null}.
045 * @throws AssertionError if the actual value is not positive.
046 */
047 NumberAssert<T> isPositive();
048
049 /**
050 * Verifies that the actual value is negative.
051 * @return this assertion object.
052 * @throws AssertionError if the actual value is {@code null}.
053 * @throws AssertionError if the actual value is not negative.
054 */
055 NumberAssert<T> isNegative();
056
057 }