TestJsonMapper.java

/*
 * Copyright 2010 Proofpoint, Inc.
 *
 * 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 io.airlift.jaxrs;

import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.google.common.net.HttpHeaders;
import io.airlift.jaxrs.testing.GuavaMultivaluedMap;
import io.airlift.json.JsonCodec;
import org.testng.Assert;
import org.testng.annotations.Test;

import javax.ws.rs.WebApplicationException;
import javax.ws.rs.core.MultivaluedMap;

import java.io.ByteArrayOutputStream;
import java.io.EOFException;
import java.io.IOException;
import java.io.InputStream;
import java.util.zip.ZipException;

import static java.nio.charset.StandardCharsets.UTF_8;

public class TestJsonMapper
{
    @Test
    public void testSuccess()
            throws IOException
    {
        assertRoundTrip("value");
        assertRoundTrip("<");
        assertRoundTrip(">");
        assertRoundTrip("&");
        assertRoundTrip("<>'&");
    }

    private void assertRoundTrip(String value)
            throws IOException
    {
        JsonCodec<String> jsonCodec = JsonCodec.jsonCodec(String.class);
        JsonMapper jsonMapper = new JsonMapper(new ObjectMapper());
        ByteArrayOutputStream outputStream = new ByteArrayOutputStream();

        MultivaluedMap<String, Object> headers = new GuavaMultivaluedMap<>();
        jsonMapper.writeTo(value, String.class, null, null, null, headers, outputStream);

        String json = new String(outputStream.toByteArray(), UTF_8);
        Assert.assertTrue(!json.contains("<"));
        Assert.assertTrue(!json.contains(">"));
        Assert.assertTrue(!json.contains("'"));
        Assert.assertTrue(!json.contains("&"));
        Assert.assertEquals(jsonCodec.fromJson(json), value);

        Assert.assertEquals(headers.getFirst(HttpHeaders.X_CONTENT_TYPE_OPTIONS), "nosniff");
    }

    @Test
    public void testEOFExceptionReturnsJsonMapperParsingException()
            throws IOException
    {
        try {
            JsonMapper jsonMapper = new JsonMapper(new ObjectMapper());
            jsonMapper.readFrom(Object.class, Object.class, null, null, null, new InputStream()
            {
                @Override
                public int read()
                        throws IOException
                {
                    throw new EOFException("forced EOF Exception");
                }

                @Override
                public int read(byte[] b)
                        throws IOException
                {
                    throw new EOFException("forced EOF Exception");
                }

                @Override
                public int read(byte[] b, int off, int len)
                        throws IOException
                {
                    throw new EOFException("forced EOF Exception");
                }
            });
            Assert.fail("Should have thrown a JsonMapperParsingException");
        }
        catch (JsonMapperParsingException e) {
            Assert.assertTrue((e.getMessage()).startsWith("Invalid json for Java type"));
        }
    }

    @Test
    public void testJsonProcessingExceptionThrowsJsonMapperParsingException()
            throws IOException
    {
        try {
            JsonMapper jsonMapper = new JsonMapper(new ObjectMapper());
            jsonMapper.readFrom(Object.class, Object.class, null, null, null, new InputStream()
            {
                @Override
                public int read()
                        throws IOException
                {
                    throw new TestingJsonProcessingException("forced JsonProcessingException");
                }

                @Override
                public int read(byte[] b)
                        throws IOException
                {
                    throw new TestingJsonProcessingException("forced JsonProcessingException");
                }

                @Override
                public int read(byte[] b, int off, int len)
                        throws IOException
                {
                    throw new TestingJsonProcessingException("forced JsonProcessingException");
                }
            });
            Assert.fail("Should have thrown a JsonMapperParsingException");
        }
        catch (JsonMapperParsingException e) {
            Assert.assertTrue((e.getMessage()).startsWith("Invalid json for Java type"));
        }
    }

    @Test(expectedExceptions = IOException.class)
    public void testOtherIOExceptionThrowsIOException()
            throws IOException
    {
        try {
            JsonMapper jsonMapper = new JsonMapper(new ObjectMapper());
            jsonMapper.readFrom(Object.class, Object.class, null, null, null, new InputStream()
            {
                @Override
                public int read()
                        throws IOException
                {
                    throw new ZipException("forced ZipException");
                }

                @Override
                public int read(byte[] b)
                        throws IOException
                {
                    throw new ZipException("forced ZipException");
                }

                @Override
                public int read(byte[] b, int off, int len)
                        throws IOException
                {
                    throw new ZipException("forced ZipException");
                }
            });
            Assert.fail("Should have thrown an IOException");
        }
        catch (WebApplicationException e) {
            Assert.fail("Should not have received a WebApplicationException", e);
        }
    }

    private static class TestingJsonProcessingException
            extends JsonProcessingException
    {
        public TestingJsonProcessingException(String message)
        {
            super(message);
        }
    }
}