binding/mdsal-binding-dom-codec/src/test/java/org/opendaylight/mdsal/binding/dom/codec/impl/LazyBindingListTest.java

   1 /*
   2  * Copyright (c) 2020 PANTHEON.tech, s.r.o. 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.mdsal.binding.dom.codec.impl;
   9
  10 import static org.hamcrest.CoreMatchers.instanceOf;
  11 import static org.hamcrest.CoreMatchers.not;
  12 import static org.hamcrest.MatcherAssert.assertThat;
  13 import static org.junit.Assert.assertEquals;
  14 import static org.junit.Assert.assertSame;
  15 import static org.junit.Assert.assertThrows;
  16
  17 import java.util.ArrayList;
  18 import java.util.List;
  19 import org.junit.Test;
  20 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.mdsal.test.binding.rev140701.Top;
  21 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.mdsal.test.binding.rev140701.two.level.list.TopLevelList;
  22 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.mdsal.test.binding.rev140701.two.level.list.TopLevelListBuilder;
  23 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.mdsal.test.binding.rev140701.two.level.list.top.level.list.NestedList;
  24 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.mdsal.test.binding.rev140701.two.level.list.top.level.list.NestedListBuilder;
  25 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
  26
  27 public class LazyBindingListTest extends AbstractBindingCodecTest {
  28     @Test
  29     public void testLazyList() {
  30         final List<NestedList> nested = new ArrayList<>();
  31         for (int i = 0; i < 2 * LazyBindingList.LAZY_CUTOFF; ++i) {
  32             nested.add(new NestedListBuilder().setName(String.valueOf(i)).build());
  33         }
  34         final TopLevelList expected = new TopLevelListBuilder()
  35                 .setName("test")
  36                 .setNestedList(nested)
  37                 .build();
  38         final TopLevelList actual = thereAndBackAgain(
  39             InstanceIdentifier.create(Top.class).child(TopLevelList.class, expected.key()), expected);
  40
  41         final List<NestedList> list = actual.getNestedList();
  42         assertThat(list, instanceOf(LazyBindingList.class));
  43
  44         // Equality does all the right things to check happy paths
  45         assertEquals(expected.getNestedList(), list);
  46         assertEquals(expected.getNestedList().hashCode(), list.hashCode());
  47
  48         // Make sure the list performs proper caching
  49         assertSame(list.get(LazyBindingList.LAZY_CUTOFF), list.get(LazyBindingList.LAZY_CUTOFF));
  50
  51         // Test throws, just for completeness' sake
  52         assertThrows(UnsupportedOperationException.class, () -> list.add(null));
  53         assertThrows(UnsupportedOperationException.class, () -> list.addAll(null));
  54         assertThrows(UnsupportedOperationException.class, () -> list.addAll(0, null));
  55         assertThrows(UnsupportedOperationException.class, () -> list.remove(null));
  56         assertThrows(UnsupportedOperationException.class, () -> list.removeAll(null));
  57         assertThrows(UnsupportedOperationException.class, () -> list.replaceAll(null));
  58         assertThrows(UnsupportedOperationException.class, () -> list.retainAll(null));
  59         assertThrows(UnsupportedOperationException.class, () -> list.sort(null));
  60         assertThrows(UnsupportedOperationException.class, () -> list.clear());
  61     }
  62
  63     @Test
  64     public void testSingletonList() {
  65         final TopLevelList expected = new TopLevelListBuilder()
  66                 .setName("test")
  67                 .setNestedList(List.of(new NestedListBuilder().setName(String.valueOf("one")).build()))
  68                 .build();
  69         final TopLevelList actual = thereAndBackAgain(
  70             InstanceIdentifier.create(Top.class).child(TopLevelList.class, expected.key()), expected);
  71
  72         final List<NestedList> list = actual.getNestedList();
  73         assertThat(list, not(instanceOf(LazyBindingList.class)));
  74         assertEquals(expected.getNestedList(), list);
  75     }
  76 }