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    1   /**
    2    * Copyright (c) 2008-2011, http://www.snakeyaml.org
    3    *
    4    * Licensed under the Apache License, Version 2.0 (the "License");
    5    * you may not use this file except in compliance with the License.
    6    * You may obtain a copy of the License at
    7    *
    8    *     http://www.apache.org/licenses/LICENSE-2.0
    9    *
    10   * Unless required by applicable law or agreed to in writing, software
    11   * distributed under the License is distributed on an "AS IS" BASIS,
    12   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13   * See the License for the specific language governing permissions and
    14   * limitations under the License.
    15   */
    16
    17  package org.yaml.snakeyaml.issues.issue58;
    18
    19  import java.util.ArrayList;
    20
    21  import junit.framework.TestCase;
    22
    23  import org.yaml.snakeyaml.Yaml;
    24
    25  public class NullValueDumperTest extends TestCase {
    26
    27      public static class Foo {
    28          private ArrayList<Object> bar = new ArrayList<Object>();
    29
    30          public ArrayList<Object> getBar() {
    31              return bar;
    32          }
    33
    34          public void setBar(ArrayList<Object> bar) {
    35              this.bar = bar;
    36          }
    37      }
    38
    39      public void testListElement() {
    40          final Foo foo = new Foo();
    41          foo.bar.add(1);
    42          foo.bar.add("A");
    43          foo.bar.add(3.14);
    44          Yaml yaml = new Yaml();
    45          assertEquals("bar:\n- 1\n- A\n- 3.14\n", yaml.dumpAsMap(foo));
    46      }
    47
    48      public void testNullListElement() {
    49          final Foo foo = new Foo();
    50
    51          foo.bar.add(1);
    52          foo.bar.add("A");
    53          foo.bar.add(null);
    54          foo.bar.add(3.14);
    55          Yaml yaml = new Yaml();
    56          assertEquals("bar:\n- 1\n- A\n- null\n- 3.14\n", yaml.dumpAsMap(foo));
    57          assertEquals(
    58                  "!!org.yaml.snakeyaml.issues.issue58.NullValueDumperTest$Foo\nbar: [1, A, null, 3.14]\n",
    59                  new Yaml().dump(foo));
    60      }
    61  }