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/**
* Copyright (c) 2008, http://www.snakeyaml.org
*
* Licensed 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.pyyaml;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.TreeMap;
import junit.framework.TestCase;
import org.yaml.snakeyaml.Yaml;
import org.yaml.snakeyaml.constructor.SafeConstructor;
public class PyRecursiveTest extends TestCase {
@SuppressWarnings("unchecked")
public void testDict() {
Map<AnInstance, AnInstance> value = new HashMap<AnInstance, AnInstance>();
AnInstance instance = new AnInstance(value, value);
value.put(instance, instance);
Yaml yaml = new Yaml();
String output1 = yaml.dump(value);
assertTrue(output1.contains("!!org.pyyaml.AnInstance"));
assertTrue(output1.contains("&id001"));
assertTrue(output1.contains("&id002"));
assertTrue(output1.contains("*id001"));
assertTrue(output1.contains("*id002"));
assertTrue(output1.contains("foo"));
assertTrue(output1.contains("bar"));
Map<AnInstance, AnInstance> value2 = (Map<AnInstance, AnInstance>) yaml.load(output1);
assertEquals(value.size(), value2.size());
for (AnInstance tmpInstance : value2.values()) {
assertSame(tmpInstance.getBar(), tmpInstance.getFoo());
assertSame(tmpInstance.getBar(), value2);
assertSame(tmpInstance, value2.get(tmpInstance));
}
}
@SuppressWarnings({ "unchecked", "rawtypes" })
public void testDictSafeConstructor() {
Map value = new TreeMap();
value.put("abc", "www");
value.put("qwerty", value);
Yaml yaml = new Yaml(new SafeConstructor());
String output1 = yaml.dump(value);
assertEquals("&id001\nabc: www\nqwerty: *id001\n", output1);
Map value2 = (Map) yaml.load(output1);
assertEquals(2, value2.size());
assertEquals("www", value2.get("abc"));
assertTrue(value2.get("qwerty") instanceof Map);
Map value3 = (Map) value2.get("qwerty");
assertTrue(value3.get("qwerty") instanceof Map);
}
@SuppressWarnings({ "unchecked", "rawtypes" })
public void testList() {
List value = new ArrayList();
value.add(value);
value.add("test");
value.add(new Integer(1));
Yaml yaml = new Yaml();
String output1 = yaml.dump(value);
assertEquals("&id001\n- *id001\n- test\n- 1\n", output1);
List value2 = (List) yaml.load(output1);
assertEquals(3, value2.size());
assertEquals(value.size(), value2.size());
assertSame(value2, value2.get(0));
// we expect self-reference as 1st element of the list
// let's remove self-reference and check other "simple" members of the
// list. otherwise assertEquals will lead us to StackOverflow
value.remove(0);
value2.remove(0);
assertEquals(value, value2);
}
@SuppressWarnings({ "unchecked", "rawtypes" })
public void testListSafeConstructor() {
List value = new ArrayList();
value.add(value);
value.add("test");
value.add(new Integer(1));
Yaml yaml = new Yaml(new SafeConstructor());
String output1 = yaml.dump(value);
assertEquals("&id001\n- *id001\n- test\n- 1\n", output1);
List value2 = (List) yaml.load(output1);
assertEquals(3, value2.size());
assertEquals(value.size(), value2.size());
assertSame(value2, value2.get(0));
// we expect self-reference as 1st element of the list
// let's remove self-reference and check other "simple" members of the
// list. otherwise assertEquals will lead us to StackOverflow
value.remove(0);
value2.remove(0);
assertEquals(value, value2);
}
@SuppressWarnings({ "unchecked", "rawtypes" })
public void testSet() {
Set value = new HashSet();
value.add(new AnInstance(value, value));
Yaml yaml = new Yaml();
String output1 = yaml.dump(value);
Set<AnInstance> value2 = (Set<AnInstance>) yaml.load(output1);
assertEquals(value.size(), value2.size());
for (AnInstance tmpInstance : value2) {
assertSame(tmpInstance.getBar(), tmpInstance.getFoo());
assertSame(tmpInstance.getBar(), value2);
}
}
public void testSet2() {
Set<Object> set = new HashSet<Object>(3);
set.add("aaa");
set.add(111);
set.add(set);
Yaml yaml = new Yaml();
try {
yaml.dump(set);
fail("Java does not allow a recursive set to be a key for a map.");
} catch (StackOverflowError e) {
// ignore
}
}
}
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