| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.apache.commons.functor.core.algorithm; |
| |
| import static org.junit.Assert.assertEquals; |
| import static org.junit.Assert.assertNotNull; |
| import static org.junit.Assert.assertTrue; |
| import static org.junit.Assert.fail; |
| |
| import java.util.Arrays; |
| import java.util.List; |
| import java.util.NoSuchElementException; |
| |
| import org.apache.commons.functor.BaseFunctorTest; |
| import org.apache.commons.functor.UnaryPredicate; |
| import org.apache.commons.functor.adapter.LeftBoundPredicate; |
| import org.apache.commons.functor.core.IsEqual; |
| import org.apache.commons.functor.core.algorithm.FindWithinGenerator; |
| import org.apache.commons.functor.generator.IteratorToGeneratorAdapter; |
| import org.junit.Test; |
| |
| /** |
| * Tests {@link FindWithinGenerator} algorithm. |
| */ |
| public class TestFindWithinGenerator extends BaseFunctorTest { |
| |
| @Override |
| protected Object makeFunctor() throws Exception { |
| return new FindWithinGenerator<Object>(); |
| } |
| |
| @Test |
| public void testObjectEqualsWithIfNone() throws Exception { |
| Object obj = new FindWithinGenerator<Object>(1); |
| assertEquals("equals must be reflexive",obj,obj); |
| assertEquals("hashCode must be reflexive",obj.hashCode(),obj.hashCode()); |
| assertTrue(! obj.equals(null) ); // should be able to compare to null |
| |
| Object obj2 = new FindWithinGenerator<Object>(1); |
| if (obj.equals(obj2)) { |
| assertEquals("equals implies hash equals",obj.hashCode(),obj2.hashCode()); |
| assertEquals("equals must be symmetric",obj2,obj); |
| } else { |
| assertTrue("equals must be symmetric",! obj2.equals(obj)); |
| } |
| } |
| |
| @Test |
| public void testObjectEqualsWithNullDefault() throws Exception { |
| Object obj = new FindWithinGenerator<Object>(null); |
| assertEquals("equals must be reflexive",obj,obj); |
| assertEquals("hashCode must be reflexive",obj.hashCode(),obj.hashCode()); |
| assertTrue(! obj.equals(null) ); // should be able to compare to null |
| |
| Object obj2 = new FindWithinGenerator<Object>(null); |
| if (obj.equals(obj2)) { |
| assertEquals("equals implies hash equals",obj.hashCode(),obj2.hashCode()); |
| assertEquals("equals must be symmetric",obj2,obj); |
| } else { |
| assertTrue("equals must be symmetric",! obj2.equals(obj)); |
| } |
| } |
| |
| @Test |
| public void testDetect() { |
| assertEquals(new Integer(3),new FindWithinGenerator<Integer>().evaluate(IteratorToGeneratorAdapter.adapt(numbers.iterator()),equalsThree)); |
| try { |
| new FindWithinGenerator<Integer>().evaluate(IteratorToGeneratorAdapter.adapt(numbers.iterator()),equalsTwentyThree); |
| fail("Expected NoSuchElementException"); |
| } catch(NoSuchElementException e) { |
| // expected |
| } |
| } |
| |
| @Test |
| public void testDetectIfNone() { |
| assertEquals(new Integer(3),new FindWithinGenerator<Integer>(new Integer(3)).evaluate(IteratorToGeneratorAdapter.adapt(numbers.iterator()),equalsThree)); |
| assertEquals("Xyzzy",new FindWithinGenerator<String>("Xyzzy").evaluate(IteratorToGeneratorAdapter.adapt(strings.iterator()),equalsXyZ)); |
| } |
| |
| @Test |
| public void testInstance() { |
| assertNotNull("FindWithinGenerator instance must not be null", FindWithinGenerator.instance()); |
| } |
| |
| // Attributes |
| // ------------------------------------------------------------------------ |
| |
| private List<Integer> numbers = Arrays.asList(0,1,2,3,4,5,6,7,8,9); |
| private List<String> strings = Arrays.asList("Zyx", "xxyZ"); |
| private UnaryPredicate<Integer> equalsThree = LeftBoundPredicate.bind(IsEqual.instance(),new Integer(3)); |
| private UnaryPredicate<Integer> equalsTwentyThree = LeftBoundPredicate.bind(IsEqual.instance(),new Integer(23)); |
| private UnaryPredicate<String> equalsXyZ = LeftBoundPredicate.bind(IsEqual.instance(),"xyZ"); |
| |
| } |