Test that DefaultHttpClient responds gracefully when the server closes a socket.

/*

 * Copyright (C) 2010 The Android Open Source Project

 *

 * 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 android.net.http;

import java.io.IOException;

import java.io.InputStreamReader;

import java.io.Reader;

import java.io.StringWriter;

import junit.framework.TestCase;

import org.apache.http.HttpResponse;

import org.apache.http.client.methods.HttpGet;

import org.apache.http.impl.client.DefaultHttpClient;

import tests.http.MockResponse;

import tests.http.MockWebServer;

import tests.http.SocketPolicy;

import static tests.http.SocketPolicy.DISCONNECT_AT_END;

import static tests.http.SocketPolicy.SHUTDOWN_INPUT_AT_END;

import static tests.http.SocketPolicy.SHUTDOWN_OUTPUT_AT_END;

public final class DefaultHttpClientTest extends TestCase {

    private MockWebServer server = new MockWebServer();

    @Override protected void tearDown() throws Exception {

        server.shutdown();

        super.tearDown();

    }

    public void testServerClosesSocket() throws Exception {

        testServerClosesOutput(DISCONNECT_AT_END);

    }

    public void testServerShutdownInput() throws Exception {

        testServerClosesOutput(SHUTDOWN_INPUT_AT_END);

    }

    /**

     * DefaultHttpClient fails if the server shutdown the output after the

     * response was sent. http://b/2612240

     */

    public void testServerShutdownOutput() throws Exception {

        testServerClosesOutput(SHUTDOWN_OUTPUT_AT_END);

    }

    private void testServerClosesOutput(SocketPolicy socketPolicy) throws Exception {

        server.enqueue(new MockResponse()

                .setBody("This connection won't pool properly")

                .setSocketPolicy(socketPolicy));

        server.enqueue(new MockResponse()

                .setBody("This comes after a busted connection"));

        server.play();

        DefaultHttpClient client = new DefaultHttpClient();

        HttpResponse a = client.execute(new HttpGet(server.getUrl("/a").toURI()));

        assertEquals("This connection won't pool properly", contentToString(a));

        assertEquals(0, server.takeRequest().getSequenceNumber());

        HttpResponse b = client.execute(new HttpGet(server.getUrl("/b").toURI()));

        assertEquals("This comes after a busted connection", contentToString(b));

        // sequence number 0 means the HTTP socket connection was not reused

        assertEquals(0, server.takeRequest().getSequenceNumber());

    }

    private String contentToString(HttpResponse response) throws IOException {

        StringWriter writer = new StringWriter();

        char[] buffer = new char[1024];

        Reader reader = new InputStreamReader(response.getEntity().getContent());

        int length;

        while ((length = reader.read(buffer)) != -1) {

            writer.write(buffer, 0, length);

        }

        reader.close();

        return writer.toString();

    }

}