de.codecentric.boot.admin.zuul.filters.post.SendResponseFilterTests.java Source code

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Here is the source code for de.codecentric.boot.admin.zuul.filters.post.SendResponseFilterTests.java

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/*
 * Copyright 2013-2015 the original author or authors.
 *
 * 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 de.codecentric.boot.admin.zuul.filters.post;

import static org.hamcrest.CoreMatchers.is;
import static org.hamcrest.Matchers.equalTo;
import static org.junit.Assert.assertThat;
import static org.junit.Assert.assertTrue;
import static org.mockito.Matchers.anyInt;
import static org.mockito.Matchers.isA;
import static org.mockito.Mockito.doThrow;
import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.verify;
import static org.mockito.Mockito.when;

import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.lang.reflect.UndeclaredThrowableException;

import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.http.client.methods.CloseableHttpResponse;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;
import org.springframework.http.HttpHeaders;
import org.springframework.http.HttpStatus;
import org.springframework.mock.web.MockHttpServletRequest;
import org.springframework.mock.web.MockHttpServletResponse;
import org.springframework.web.util.WebUtils;

import com.netflix.zuul.context.RequestContext;

/**
 * Copy from sprig cloud netflix which is part of a fix for
 * https://github.com/spring-cloud/spring-cloud-netflix/pull/1372
 *
 * @author Johannes Edmeier
 * @author Spencer Gibb
 */
public class SendResponseFilterTests {

    @Before
    public void setTestRequestcontext() {
        RequestContext context = new RequestContext();
        RequestContext.testSetCurrentContext(context);
    }

    @After
    public void reset() {
        RequestContext.getCurrentContext().clear();
    }

    @Test
    public void runsNormally() throws Exception {
        String characterEncoding = null;
        String content = "hello";
        runFilter(characterEncoding, content, false);
    }

    @Test
    public void characterEncodingNotOverridden() throws Exception {
        String characterEncoding = "UTF-16";
        String content = "\u00a5";
        runFilter(characterEncoding, content, true);
    }

    @Test
    public void closeResponseOutpusStreamError() throws Exception {
        HttpServletResponse response = mock(HttpServletResponse.class);

        RequestContext context = new RequestContext();
        context.setRequest(new MockHttpServletRequest());
        context.setResponse(response);
        context.setResponseDataStream(new ByteArrayInputStream("Hello\n".getBytes("UTF-8")));
        CloseableHttpResponse zuulResponse = mock(CloseableHttpResponse.class);
        context.set("zuulResponse", zuulResponse);
        RequestContext.testSetCurrentContext(context);

        SendResponseFilter filter = new SendResponseFilter();

        ServletOutputStream zuuloutputstream = mock(ServletOutputStream.class);
        doThrow(new IOException("Response to client closed")).when(zuuloutputstream).write(isA(byte[].class),
                anyInt(), anyInt());

        when(response.getOutputStream()).thenReturn(zuuloutputstream);

        try {
            filter.run();
        } catch (UndeclaredThrowableException ex) {
            assertThat(ex.getUndeclaredThrowable().getMessage(), is("Response to client closed"));
        }

        verify(zuulResponse).close();
    }

    private void runFilter(String characterEncoding, String content, boolean streamContent) throws Exception {
        MockHttpServletResponse response = new MockHttpServletResponse();
        SendResponseFilter filter = createFilter(content, characterEncoding, response, streamContent);
        assertTrue("shouldFilter returned false", filter.shouldFilter());
        filter.run();
        String encoding = RequestContext.getCurrentContext().getResponse().getCharacterEncoding();
        String expectedEncoding = characterEncoding != null ? characterEncoding
                : WebUtils.DEFAULT_CHARACTER_ENCODING;
        assertThat("wrong character encoding", encoding, equalTo(expectedEncoding));
        assertThat("wrong content", response.getContentAsString(), equalTo(content));
    }

    private SendResponseFilter createFilter(String content, String characterEncoding,
            MockHttpServletResponse response, boolean streamContent) throws Exception {
        HttpServletRequest request = new MockHttpServletRequest();
        RequestContext context = new RequestContext();
        context.setRequest(request);
        context.setResponse(response);

        if (characterEncoding != null) {
            response.setCharacterEncoding(characterEncoding);
        }

        if (streamContent) {
            context.setResponseDataStream(new ByteArrayInputStream(content.getBytes(characterEncoding)));
        } else {
            context.setResponseBody(content);
        }

        context.addZuulResponseHeader(HttpHeaders.CONTENT_LENGTH, String.valueOf(content.length()));

        context.set("error.status_code", HttpStatus.NOT_FOUND.value());
        RequestContext.testSetCurrentContext(context);
        SendResponseFilter filter = new SendResponseFilter();
        return filter;
    }

}