common/util/src/test/java/org/opendaylight/yangtools/util/ConstantArrayCollectionTest.java

   1 /*
   2  * Copyright (c) 2015 Cisco Systems, Inc. and others.  All rights reserved.
   3  *
   4  * This program and the accompanying materials are made available under the
   5  * terms of the Eclipse Public License v1.0 which accompanies this distribution,
   6  * and is available at http://www.eclipse.org/legal/epl-v10.html
   7  */
   8 package org.opendaylight.yangtools.util;
   9
  10 import static org.junit.Assert.assertEquals;
  11 import static org.junit.Assert.assertFalse;
  12 import static org.junit.Assert.assertThrows;
  13 import static org.junit.Assert.assertTrue;
  14
  15 import com.google.common.collect.ImmutableList;
  16 import com.google.common.collect.Iterables;
  17 import java.util.Collection;
  18 import java.util.Collections;
  19 import org.junit.Test;
  20
  21 public class ConstantArrayCollectionTest {
  22     private static final String[] ARRAY = new String[] { "a", "bb", "ccc" };
  23     private static final Collection<String> REF = ImmutableList.copyOf(ARRAY);
  24
  25     private static Collection<String> create() {
  26         return new ConstantArrayCollection<>(ARRAY.clone());
  27     }
  28
  29     @Test
  30     public void testToString() {
  31         // Empty
  32         assertEquals(Collections.emptySet().toString(), new ConstantArrayCollection<>(new Object[0]).toString());
  33
  34         // Normal
  35         assertEquals(REF.toString(), create().toString());
  36     }
  37
  38     @Test
  39     public void testEquals() {
  40         final Collection<?> c = create();
  41
  42         assertTrue(c.containsAll(REF));
  43         assertTrue(REF.containsAll(c));
  44         assertTrue(Iterables.elementsEqual(REF, c));
  45     }
  46
  47     @Test
  48     public void testSimpleOperations() {
  49         final Collection<?> c = create();
  50
  51         assertEquals(ARRAY.length, c.size());
  52         assertFalse(c.isEmpty());
  53         assertTrue(c.contains("ccc"));
  54         assertFalse(c.contains(""));
  55         assertFalse(c.contains(1));
  56
  57         assertTrue(c.containsAll(Collections.emptyList()));
  58         assertFalse(c.containsAll(Collections.singleton("")));
  59         assertFalse(c.containsAll(Collections.singleton(1)));
  60     }
  61
  62     @Test
  63     public void testProtection() {
  64         final Collection<?> c = create();
  65
  66         assertThrows(UnsupportedOperationException.class, () -> c.add(null));
  67         assertThrows(UnsupportedOperationException.class, () -> c.remove(null));
  68         assertThrows(UnsupportedOperationException.class, () -> c.addAll(null));
  69         assertThrows(UnsupportedOperationException.class, () -> c.removeAll(null));
  70         assertThrows(UnsupportedOperationException.class, () -> c.retainAll(null));
  71         assertThrows(UnsupportedOperationException.class, () -> c.clear());
  72     }
  73 }