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 org.junit.Test;
  19
  20 public class CodeHelpersTest {
  21     @Test
  22     public void testCheckedFieldCast() {
  23         assertNull(CodeHelpers.checkFieldCast(CodeHelpersTest.class, "foo", null));
  24         assertSame(this, CodeHelpers.checkFieldCast(CodeHelpersTest.class, "foo", this));
  25
  26         final IllegalArgumentException iae = assertThrows(IllegalArgumentException.class,
  27             () -> CodeHelpers.checkFieldCast(CodeHelpersTest.class, "foo", new Object()));
  28         assertThat(iae.getCause(), instanceOf(ClassCastException.class));
  29     }
  30
  31     @Test
  32     public void testCheckListFieldCast() {
  33         assertNull(CodeHelpers.checkListFieldCast(CodeHelpersTest.class, "foo", null));
  34         assertSame(List.of(), CodeHelpers.checkListFieldCast(CodeHelpersTest.class, "foo", List.of()));
  35         final var list = List.of(this);
  36         assertSame(list, CodeHelpers.checkListFieldCast(CodeHelpersTest.class, "foo", list));
  37
  38         IllegalArgumentException iae = assertThrows(IllegalArgumentException.class,
  39             () -> CodeHelpers.checkListFieldCast(CodeHelpersTest.class, "foo", Collections.singletonList(null)));
  40         assertThat(iae.getCause(), instanceOf(NullPointerException.class));
  41
  42         iae = assertThrows(IllegalArgumentException.class,
  43             () -> CodeHelpers.checkListFieldCast(CodeHelpersTest.class, "foo", List.of(new Object())));
  44         assertThat(iae.getCause(), instanceOf(ClassCastException.class));
  45     }
  46 }