| /* |
| * 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.knox.gateway.filter; |
| |
| import org.junit.Test; |
| |
| import java.util.Arrays; |
| import java.util.Collections; |
| import java.util.Enumeration; |
| import java.util.NoSuchElementException; |
| |
| import static org.hamcrest.CoreMatchers.is; |
| import static org.hamcrest.MatcherAssert.assertThat; |
| |
| public class CompositeEnumerationTest { |
| @Test |
| public void testBasics() { |
| String[] a = new String[]{ "1", "2" }; |
| Enumeration<String> ea = Collections.enumeration( Arrays.asList( a ) ); |
| |
| String[] b = new String[]{ "3", "4" }; |
| Enumeration<String> eb = Collections.enumeration( Arrays.asList( b ) ); |
| |
| CompositeEnumeration<String> ce = new CompositeEnumeration<>( ea, eb ); |
| |
| assertThat( ce.nextElement(), is( "1" ) ); |
| assertThat( ce.nextElement(), is( "2" ) ); |
| assertThat( ce.nextElement(), is( "3" ) ); |
| assertThat( ce.nextElement(), is( "4" ) ); |
| assertThat( ce.hasMoreElements(), is( false ) ); |
| } |
| |
| @Test |
| public void testSingleValues() { |
| String[] a = new String[]{ "1" }; |
| Enumeration<String> ea = Collections.enumeration( Arrays.asList( a ) ); |
| |
| String[] b = new String[]{ "2" }; |
| Enumeration<String> eb = Collections.enumeration( Arrays.asList( b ) ); |
| |
| CompositeEnumeration<String> ce = new CompositeEnumeration<>( ea, eb ); |
| |
| assertThat( ce.nextElement(), is( "1" ) ); |
| assertThat( ce.nextElement(), is( "2" ) ); |
| assertThat( ce.hasMoreElements(), is( false ) ); |
| } |
| |
| @Test |
| public void testEmptyEnumerations() { |
| String[] a = new String[]{ "1", "2" }; |
| String[] b = new String[]{ "3", "4" }; |
| String[] c = new String[]{}; |
| |
| Enumeration<String> e1 = Collections.enumeration( Arrays.asList( a ) ); |
| Enumeration<String> e2 = Collections.enumeration( Arrays.asList( c ) ); |
| CompositeEnumeration<String> ce = new CompositeEnumeration<>( e1, e2 ); |
| assertThat( ce.nextElement(), is( "1" ) ); |
| assertThat( ce.nextElement(), is( "2" ) ); |
| assertThat( ce.hasMoreElements(), is( false ) ); |
| |
| e1 = Collections.enumeration( Arrays.asList( c ) ); |
| e2 = Collections.enumeration( Arrays.asList( a ) ); |
| ce = new CompositeEnumeration<>( e1, e2 ); |
| assertThat( ce.nextElement(), is( "1" ) ); |
| assertThat( ce.nextElement(), is( "2" ) ); |
| assertThat( ce.hasMoreElements(), is( false ) ); |
| |
| e1 = Collections.enumeration( Arrays.asList( c ) ); |
| e2 = Collections.enumeration( Arrays.asList( c ) ); |
| ce = new CompositeEnumeration<>( e1, e2 ); |
| assertThat( ce.hasMoreElements(), is( false ) ); |
| } |
| |
| @Test (expected = NoSuchElementException.class) |
| public void testEmpty() { |
| CompositeEnumeration<String> ce = new CompositeEnumeration<>(); |
| assertThat( ce.hasMoreElements(), is( false ) ); |
| ce.nextElement(); |
| } |
| |
| @Test (expected = IllegalArgumentException.class) |
| public void testNulls() { |
| new CompositeEnumeration<>( null ); |
| } |
| } |