binding/yang-binding/src/test/java/org/opendaylight/yangtools/yang/binding/CodeHelpersTest.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.yangtools.yang.binding;
   9
  10 import static org.hamcrest.CoreMatchers.instanceOf;
  11 import static org.hamcrest.MatcherAssert.assertThat;
  12 import static org.junit.Assert.assertNull;
  13 import static org.junit.Assert.assertSame;
  14 import static org.junit.Assert.assertThrows;
  15
  16 import java.util.Collections;
  17 import java.util.List;
  18 import java.util.Set;
  19 import org.junit.Test;
  20
  21 public class CodeHelpersTest {
  22     @Test
  23     public void testCheckedFieldCast() {
  24         assertNull(CodeHelpers.checkFieldCast(CodeHelpersTest.class, "foo", null));
  25         assertSame(this, CodeHelpers.checkFieldCast(CodeHelpersTest.class, "foo", this));
  26
  27         final IllegalArgumentException iae = assertThrows(IllegalArgumentException.class,
  28             () -> CodeHelpers.checkFieldCast(CodeHelpersTest.class, "foo", new Object()));
  29         assertThat(iae.getCause(), instanceOf(ClassCastException.class));
  30     }
  31
  32     @Test
  33     public void testCheckListFieldCast() {
  34         assertNull(CodeHelpers.checkListFieldCast(CodeHelpersTest.class, "foo", null));
  35         assertSame(List.of(), CodeHelpers.checkListFieldCast(CodeHelpersTest.class, "foo", List.of()));
  36         final var list = List.of(this);
  37         assertSame(list, CodeHelpers.checkListFieldCast(CodeHelpersTest.class, "foo", list));
  38
  39         IllegalArgumentException iae = assertThrows(IllegalArgumentException.class,
  40             () -> CodeHelpers.checkListFieldCast(CodeHelpersTest.class, "foo", Collections.singletonList(null)));
  41         assertThat(iae.getCause(), instanceOf(NullPointerException.class));
  42
  43         iae = assertThrows(IllegalArgumentException.class,
  44             () -> CodeHelpers.checkListFieldCast(CodeHelpersTest.class, "foo", List.of(new Object())));
  45         assertThat(iae.getCause(), instanceOf(ClassCastException.class));
  46     }
  47
  48     @Test
  49     public void testCheckSetFieldCast() {
  50         assertNull(CodeHelpers.checkSetFieldCast(CodeHelpersTest.class, "foo", null));
  51         assertSame(Set.of(), CodeHelpers.checkSetFieldCast(CodeHelpersTest.class, "foo", Set.of()));
  52         final var list = Set.of(this);
  53         assertSame(list, CodeHelpers.checkSetFieldCast(CodeHelpersTest.class, "foo", list));
  54
  55         IllegalArgumentException iae = assertThrows(IllegalArgumentException.class,
  56             () -> CodeHelpers.checkSetFieldCast(CodeHelpersTest.class, "foo", Collections.singleton(null)));
  57         assertThat(iae.getCause(), instanceOf(NullPointerException.class));
  58
  59         iae = assertThrows(IllegalArgumentException.class,
  60             () -> CodeHelpers.checkSetFieldCast(CodeHelpersTest.class, "foo", Set.of(new Object())));
  61         assertThat(iae.getCause(), instanceOf(ClassCastException.class));
  62     }
  63 }