package org.apache.tika.metadata.serialization;
/*
* 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.
*/
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNull;
import static org.junit.Assert.assertTrue;
import java.io.StringReader;
import java.io.StringWriter;
import java.util.LinkedList;
import java.util.List;
import org.apache.tika.metadata.Metadata;
import org.junit.Test;
public class JsonMetadataListTest {
@Test
public void testListBasic() throws Exception {
Metadata m1 = new Metadata();
m1.add("k1", "v1");
m1.add("k1", "v2");
m1.add("k1", "v3");
m1.add("k1", "v4");
m1.add("k1", "v4");
m1.add("k2", "v1");
Metadata m2 = new Metadata();
m2.add("k3", "v1");
m2.add("k3", "v2");
m2.add("k3", "v3");
m2.add("k3", "v4");
m2.add("k3", "v4");
m2.add("k4", "v1");
List<Metadata> metadataList = new LinkedList<Metadata>();
metadataList.add(m1);
metadataList.add(m2);
StringWriter writer = new StringWriter();
JsonMetadataList.toJson(metadataList, writer);
List<Metadata> deserialized = JsonMetadataList.fromJson(new StringReader(writer.toString()));
assertEquals(metadataList, deserialized);
}
@Test
public void testListNull() throws Exception {
StringWriter writer = new StringWriter();
JsonMetadataList.toJson(null, writer);
assertEquals("null", writer.toString().trim());
List<Metadata> m = JsonMetadataList.fromJson(null);
assertNull(m);
}
@Test
public void testListCorrupted() throws Exception {
String json = "[{\"k1\":[\"v1\",\"v2\",\"v3\",\"v4\",\"v4\"],\"k2\":\"v1\"}," +
"\"k3\":[\"v1\",\"v2\",\"v3\",\"v4\",\"v4\"],\"k4\":\"v1\"}]";
List<Metadata> m = JsonMetadataList.fromJson(null);
assertNull(m);
}
@Test
public void testPrettyPrint() throws Exception {
Metadata m1 = new Metadata();
m1.add("tika:content", "this is the content");
m1.add("zk1", "v1");
m1.add("zk1", "v2");
m1.add("zk1", "v3");
m1.add("zk1", "v4");
m1.add("zk1", "v4");
m1.add("zk2", "v1");
Metadata m2 = new Metadata();
m2.add("k3", "v1");
m2.add("k3", "v2");
m2.add("k3", "v3");
m2.add("k3", "v4");
m2.add("k3", "v4");
m2.add("k4", "v1");
List<Metadata> metadataList = new LinkedList<Metadata>();
metadataList.add(m1);
metadataList.add(m2);
StringWriter writer = new StringWriter();
JsonMetadataList.toJson(metadataList, writer);
assertTrue(writer.toString().startsWith("[{\"tika:content\":\"this is the content\",\"zk1\":[\"v1\",\"v2\","));
writer = new StringWriter();
JsonMetadataList.setPrettyPrinting(true);
JsonMetadataList.toJson(metadataList, writer);
assertTrue(writer.toString().startsWith("[\n" +
" {\n" +
" \"zk1\": [\n" +
" \"v1\",\n" +
" \"v2\","));
assertTrue(writer.toString().contains(" \"zk2\": \"v1\",\n" +
" \"tika:content\": \"this is the content\"\n" +
" },"));
//now set it back to false
JsonMetadataList.setPrettyPrinting(false);
writer = new StringWriter();
JsonMetadataList.toJson(metadataList, writer);
assertTrue(writer.toString().startsWith("[{\"tika:content\":\"this is the content\",\"zk1\":[\"v1\",\"v2\","));
}
}