content: /*
   * 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.spark.api.java;
  
  import org.junit.Assert;
  import org.junit.Test;
  
  /**
   * Tests {@link Optional}.
   */
  public class OptionalSuite {
  
    @Test
    public void testEmpty() {
      Assert.assertFalse(Optional.empty().isPresent());
      Assert.assertNull(Optional.empty().orNull());
      Assert.assertEquals("foo", Optional.empty().or("foo"));
      Assert.assertEquals("foo", Optional.empty().orElse("foo"));
    }
  
    @Test(expected = NullPointerException.class)
    public void testEmptyGet() {
      Optional.empty().get();
    }
  
    @Test
    public void testAbsent() {
      Assert.assertFalse(Optional.absent().isPresent());
      Assert.assertNull(Optional.absent().orNull());
      Assert.assertEquals("foo", Optional.absent().or("foo"));
      Assert.assertEquals("foo", Optional.absent().orElse("foo"));
    }
  
    @Test(expected = NullPointerException.class)
    public void testAbsentGet() {
      Optional.absent().get();
    }
  
    @Test
    public void testOf() {
      Assert.assertTrue(Optional.of(1).isPresent());
      Assert.assertNotNull(Optional.of(1).orNull());
      Assert.assertEquals(Integer.valueOf(1), Optional.of(1).get());
      Assert.assertEquals(Integer.valueOf(1), Optional.of(1).or(2));
      Assert.assertEquals(Integer.valueOf(1), Optional.of(1).orElse(2));
    }
  
    @Test(expected = NullPointerException.class)
    public void testOfWithNull() {
      Optional.of(null);
    }
  
    @Test
    public void testOfNullable() {
      Assert.assertTrue(Optional.ofNullable(1).isPresent());
      Assert.assertNotNull(Optional.ofNullable(1).orNull());
      Assert.assertEquals(Integer.valueOf(1), Optional.ofNullable(1).get());
      Assert.assertEquals(Integer.valueOf(1), Optional.ofNullable(1).or(2));
      Assert.assertEquals(Integer.valueOf(1), Optional.ofNullable(1).orElse(2));
      Assert.assertFalse(Optional.ofNullable(null).isPresent());
      Assert.assertNull(Optional.ofNullable(null).orNull());
      Assert.assertEquals(Integer.valueOf(2), Optional.<Integer>ofNullable(null).or(2));
      Assert.assertEquals(Integer.valueOf(2), Optional.<Integer>ofNullable(null).orElse(2));
    }
  
    @Test
    public void testFromNullable() {
      Assert.assertTrue(Optional.fromNullable(1).isPresent());
      Assert.assertNotNull(Optional.fromNullable(1).orNull());
      Assert.assertEquals(Integer.valueOf(1), Optional.fromNullable(1).get());
      Assert.assertEquals(Integer.valueOf(1), Optional.fromNullable(1).or(2));
      Assert.assertEquals(Integer.valueOf(1), Optional.fromNullable(1).orElse(2));
      Assert.assertFalse(Optional.fromNullable(null).isPresent());
      Assert.assertNull(Optional.fromNullable(null).orNull());
      Assert.assertEquals(Integer.valueOf(2), Optional.<Integer>fromNullable(null).or(2));
      Assert.assertEquals(Integer.valueOf(2), Optional.<Integer>fromNullable(null).orElse(2));
    }
  
  }
  