com.facebook.buck.slb.LoadBalancedHttpResponseTest.java Source code

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Here is the source code for com.facebook.buck.slb.LoadBalancedHttpResponseTest.java

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/*
 * Copyright 2016-present Facebook, 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 com.facebook.buck.slb;

import com.squareup.okhttp.MediaType;
import com.squareup.okhttp.Protocol;
import com.squareup.okhttp.Request;
import com.squareup.okhttp.Response;
import com.squareup.okhttp.ResponseBody;

import org.easymock.EasyMock;
import org.easymock.EasyMockSupport;
import org.junit.Assert;
import org.junit.Before;
import org.junit.Test;

import java.io.IOException;
import java.io.InputStream;
import java.net.URI;

import okio.BufferedSource;

public class LoadBalancedHttpResponseTest extends EasyMockSupport {
    private static final URI SERVER = URI.create("http://localhost/example");

    private HttpLoadBalancer mockLoadBalancer;
    private InputStream mockInputStream;
    private BufferedSource mockBufferedSource;
    private ResponseBody responseBody;
    private Response response;
    private Request request;

    @Before
    public void setUp() throws IOException {
        mockLoadBalancer = createMock(HttpLoadBalancer.class);
        mockInputStream = createMock(InputStream.class);

        mockBufferedSource = createMock(BufferedSource.class);
        mockBufferedSource.close();
        EasyMock.expectLastCall().once();

        responseBody = ResponseBody.create(MediaType.parse("text/plain"), 42, mockBufferedSource);
        request = new Request.Builder().url(SERVER.toString()).build();
        response = new Response.Builder().body(responseBody).code(200).protocol(Protocol.HTTP_1_1).request(request)
                .build();
    }

    @Test
    public void testSuccessOnlyReportedOnce() throws IOException {
        // Finish the test setup.
        mockLoadBalancer.reportRequestSuccess(EasyMock.eq(SERVER));
        EasyMock.expectLastCall().once();
        replayAll();

        // Run the test.
        LoadBalancedHttpResponse response = new LoadBalancedHttpResponse(SERVER, mockLoadBalancer, this.response);
        response.close();

        verifyAll();
    }

    @Test
    public void testSuccessOnlyReportedOnceEvenWithMultipleCloseCalls() throws IOException {
        // Finish the test setup.
        mockLoadBalancer.reportRequestSuccess(EasyMock.eq(SERVER));
        EasyMock.expectLastCall().once();
        mockBufferedSource.close();
        EasyMock.expectLastCall().once();
        replayAll();

        // Run the test.
        try (LoadBalancedHttpResponse response = new LoadBalancedHttpResponse(SERVER, mockLoadBalancer,
                this.response)) {
            response.close();
        }

        verifyAll();
    }

    @Test(expected = IOException.class)
    public void testInputStreamExceptionReportsToLoadBalancer() throws IOException {
        // Finish the test setup.
        EasyMock.expect(mockBufferedSource.inputStream()).andReturn(mockInputStream).once();
        EasyMock.expect(mockInputStream.read()).andThrow(new IOException()).once();
        mockLoadBalancer.reportRequestException(EasyMock.eq(SERVER));
        EasyMock.expectLastCall().once();
        replayAll();

        // Run the test.
        try (LoadBalancedHttpResponse response = new LoadBalancedHttpResponse(SERVER, mockLoadBalancer,
                this.response)) {
            response.getBody().read();
        }
        verifyAll();
    }

    @Test
    public void testMultipleExceptionsOnlyReportOnce() throws IOException {
        // Finish the test setup.
        final int exceptionCount = 42;
        EasyMock.expect(mockBufferedSource.inputStream()).andReturn(mockInputStream).once();
        EasyMock.expect(mockInputStream.read()).andThrow(new IOException()).times(exceptionCount);
        mockInputStream.close();
        EasyMock.expectLastCall().once();
        mockLoadBalancer.reportRequestException(EasyMock.eq(SERVER));
        EasyMock.expectLastCall().once();
        replayAll();

        // Run the test.
        try (LoadBalancedHttpResponse response = new LoadBalancedHttpResponse(SERVER, mockLoadBalancer,
                this.response)) {
            try (InputStream inputStream = response.getBody()) {
                for (int i = 0; i < exceptionCount; ++i) {
                    try {
                        inputStream.read();
                    } catch (IOException e) {
                        continue;
                    }

                    Assert.fail("An IOException should've been thrown.");
                }
            }
        }
        verifyAll();
    }
}