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Java example source code file (ServletPipelineRequestDispatcherTest.java)

This example Java source code file (ServletPipelineRequestDispatcherTest.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

a_value, binding, http, httpservletrequest, httpservletresponse, illegalstateexception, ioexception, key, managedservletpipeline, object, request, requestdispatcher, response, servlet, servletdefinition, servletexception, string, util, wrong

The ServletPipelineRequestDispatcherTest.java Java example source code

/**
 * Copyright (C) 2008 Google 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.google.inject.servlet;

import static com.google.inject.servlet.ManagedServletPipeline.REQUEST_DISPATCHER_REQUEST;
import static org.easymock.EasyMock.anyObject;
import static org.easymock.EasyMock.createMock;
import static org.easymock.EasyMock.eq;
import static org.easymock.EasyMock.expect;
import static org.easymock.EasyMock.expectLastCall;
import static org.easymock.EasyMock.replay;
import static org.easymock.EasyMock.verify;

import com.google.common.collect.ImmutableList;
import com.google.common.collect.Sets;
import com.google.inject.Binding;
import com.google.inject.Injector;
import com.google.inject.Key;
import com.google.inject.Provider;
import com.google.inject.TypeLiteral;
import com.google.inject.spi.BindingScopingVisitor;
import com.google.inject.util.Providers;

import junit.framework.TestCase;

import java.io.IOException;
import java.util.ArrayList;
import java.util.Date;
import java.util.HashMap;
import java.util.List;
import java.util.UUID;

import javax.servlet.RequestDispatcher;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 * Tests forwarding and inclusion (RequestDispatcher actions from the
 * servlet spec).
 *
 * @author Dhanji R. Prasanna (dhanji@gmail com)
 */
public class ServletPipelineRequestDispatcherTest extends TestCase {
  private static final Key<HttpServlet> HTTP_SERLVET_KEY = Key.get(HttpServlet.class);
  private static final String A_KEY = "thinglyDEgintly" + new Date() + UUID.randomUUID();
  private static final String A_VALUE = ServletPipelineRequestDispatcherTest.class.toString()
      + new Date() + UUID.randomUUID();

  public final void testIncludeManagedServlet() throws IOException, ServletException {
    String pattern = "blah.html";
    final ServletDefinition servletDefinition =
        new ServletDefinition(
            Key.get(HttpServlet.class),
            UriPatternType.get(UriPatternType.SERVLET, pattern),
            new HashMap<String, String>(),
            null);

    final Injector injector = createMock(Injector.class);
    final Binding binding = createMock(Binding.class);
    final HttpServletRequest requestMock = createMock(HttpServletRequest.class);

    expect(requestMock.getAttribute(A_KEY))
        .andReturn(A_VALUE);


    requestMock.setAttribute(REQUEST_DISPATCHER_REQUEST, true);
    requestMock.removeAttribute(REQUEST_DISPATCHER_REQUEST);

    final boolean[] run = new boolean[1];
    final HttpServlet mockServlet = new HttpServlet() {
      protected void service(HttpServletRequest request, HttpServletResponse httpServletResponse)
          throws ServletException, IOException {
        run[0] = true;

        final Object o = request.getAttribute(A_KEY);
        assertEquals("Wrong attrib returned - " + o, A_VALUE, o);
      }
    };

    expect(binding.acceptScopingVisitor((BindingScopingVisitor) anyObject()))
        .andReturn(true);
    expect(injector.getBinding(Key.get(HttpServlet.class)))
        .andReturn(binding);
    expect(injector.getInstance(HTTP_SERLVET_KEY))
        .andReturn(mockServlet);


    final Key<ServletDefinition> servetDefsKey = Key
        .get(TypeLiteral.get(ServletDefinition.class));

    Binding<ServletDefinition> mockBinding = createMock(Binding.class);
    expect(injector.findBindingsByType(eq(servetDefsKey.getTypeLiteral())))
        .andReturn(ImmutableList.<Bindingof(mockBinding));
    Provider<ServletDefinition> bindingProvider = Providers.of(servletDefinition);
    expect(mockBinding.getProvider())
        .andReturn(bindingProvider);

    replay(injector, binding, requestMock, mockBinding);

    // Have to init the Servlet before we can dispatch to it.
    servletDefinition.init(null, injector, Sets.<HttpServlet>newIdentityHashSet());

    final RequestDispatcher dispatcher = new ManagedServletPipeline(
        injector)
        .getRequestDispatcher(pattern);

    assertNotNull(dispatcher);
    dispatcher.include(requestMock, createMock(HttpServletResponse.class));

    assertTrue("Include did not dispatch to our servlet!", run[0]);

    verify(injector, requestMock, mockBinding);
  }

  public final void testForwardToManagedServlet() throws IOException, ServletException {
    String pattern = "blah.html";
    final ServletDefinition servletDefinition =
        new ServletDefinition(
            Key.get(HttpServlet.class),
            UriPatternType.get(UriPatternType.SERVLET, pattern),
            new HashMap<String, String>(),
            null);

    final Injector injector = createMock(Injector.class);
    final Binding binding = createMock(Binding.class);
    final HttpServletRequest requestMock = createMock(HttpServletRequest.class);
    final HttpServletResponse mockResponse = createMock(HttpServletResponse.class);

    expect(requestMock.getAttribute(A_KEY))
        .andReturn(A_VALUE);


    requestMock.setAttribute(REQUEST_DISPATCHER_REQUEST, true);
    requestMock.removeAttribute(REQUEST_DISPATCHER_REQUEST);

    expect(mockResponse.isCommitted())
        .andReturn(false);

    mockResponse.resetBuffer();
    expectLastCall().once();

    final List<String> paths = new ArrayList();
    final HttpServlet mockServlet = new HttpServlet() {
      protected void service(HttpServletRequest request, HttpServletResponse httpServletResponse)
          throws ServletException, IOException {
        paths.add(request.getRequestURI());

        final Object o = request.getAttribute(A_KEY);
        assertEquals("Wrong attrib returned - " + o, A_VALUE, o);
      }
    };

    expect(binding.acceptScopingVisitor((BindingScopingVisitor) anyObject()))
        .andReturn(true);
    expect(injector.getBinding(Key.get(HttpServlet.class)))
        .andReturn(binding);

    expect(injector.getInstance(HTTP_SERLVET_KEY))
        .andReturn(mockServlet);

    final Key<ServletDefinition> servetDefsKey = Key
        .get(TypeLiteral.get(ServletDefinition.class));

    Binding<ServletDefinition> mockBinding = createMock(Binding.class);
    expect(injector.findBindingsByType(eq(servetDefsKey.getTypeLiteral())))
        .andReturn(ImmutableList.<Bindingof(mockBinding));
    Provider<ServletDefinition> bindingProvider = Providers.of(servletDefinition);
    expect(mockBinding.getProvider())
        .andReturn(bindingProvider);

    replay(injector, binding, requestMock, mockResponse, mockBinding);

    // Have to init the Servlet before we can dispatch to it.
    servletDefinition.init(null, injector, Sets.<HttpServlet>newIdentityHashSet());

    final RequestDispatcher dispatcher = new ManagedServletPipeline(injector)
        .getRequestDispatcher(pattern);

    assertNotNull(dispatcher);
    dispatcher.forward(requestMock, mockResponse);

    assertTrue("Include did not dispatch to our servlet!", paths.contains(pattern));

    verify(injector, requestMock, mockResponse, mockBinding);
  }

  public final void testForwardToManagedServletFailureOnCommittedBuffer()
      throws IOException, ServletException {
    IllegalStateException expected = null;
    try {
      forwardToManagedServletFailureOnCommittedBuffer();
    }
    catch (IllegalStateException ise) {
      expected = ise;
    } finally {
      assertNotNull("Expected IllegalStateException was not thrown", expected);
    }
  }

  public final void forwardToManagedServletFailureOnCommittedBuffer()
      throws IOException, ServletException {
    String pattern = "blah.html";
    final ServletDefinition servletDefinition =
        new ServletDefinition(
            Key.get(HttpServlet.class),
            UriPatternType.get(UriPatternType.SERVLET, pattern),
            new HashMap<String, String>(),
            null);

    final Injector injector = createMock(Injector.class);
    final Binding binding = createMock(Binding.class);
    final HttpServletRequest mockRequest = createMock(HttpServletRequest.class);
    final HttpServletResponse mockResponse = createMock(HttpServletResponse.class);

    expect(mockResponse.isCommitted())
        .andReturn(true);

    final HttpServlet mockServlet = new HttpServlet() {
      protected void service(HttpServletRequest request, HttpServletResponse httpServletResponse)
          throws ServletException, IOException {

        final Object o = request.getAttribute(A_KEY);
        assertEquals("Wrong attrib returned - " + o, A_VALUE, o);
      }
    };

    expect(binding.acceptScopingVisitor((BindingScopingVisitor) anyObject()))
        .andReturn(true);
    expect(injector.getBinding(Key.get(HttpServlet.class)))
        .andReturn(binding);

    expect(injector.getInstance(Key.get(HttpServlet.class)))
        .andReturn(mockServlet);


    final Key<ServletDefinition> servetDefsKey = Key
        .get(TypeLiteral.get(ServletDefinition.class));

    Binding<ServletDefinition> mockBinding = createMock(Binding.class);
    expect(injector.findBindingsByType(eq(servetDefsKey.getTypeLiteral())))
        .andReturn(ImmutableList.<Bindingof(mockBinding));
    Provider<ServletDefinition> bindingProvider = Providers.of(servletDefinition);
    expect(mockBinding.getProvider())
        .andReturn(bindingProvider);

    replay(injector, binding, mockRequest, mockResponse, mockBinding);

    // Have to init the Servlet before we can dispatch to it.
    servletDefinition.init(null, injector, Sets.<HttpServlet>newIdentityHashSet());

    final RequestDispatcher dispatcher = new ManagedServletPipeline(injector)
        .getRequestDispatcher(pattern);

    assertNotNull(dispatcher);

    try {
      dispatcher.forward(mockRequest, mockResponse);
    }
    finally {
      verify(injector, mockRequest, mockResponse, mockBinding);
    }
  }

  public final void testWrappedRequestUriAndUrlConsistency() {
    final HttpServletRequest mockRequest = createMock(HttpServletRequest.class);
    expect(mockRequest.getScheme()).andReturn("http");
    expect(mockRequest.getServerName()).andReturn("the.server");
    expect(mockRequest.getServerPort()).andReturn(12345);
    replay(mockRequest);
    HttpServletRequest wrappedRequest = ManagedServletPipeline.wrapRequest(mockRequest, "/new-uri");
    assertEquals("/new-uri", wrappedRequest.getRequestURI());
    assertEquals("http://the.server:12345/new-uri", wrappedRequest.getRequestURL().toString());
  }

  public final void testWrappedRequestUrlNegativePort() {
    final HttpServletRequest mockRequest = createMock(HttpServletRequest.class);
    expect(mockRequest.getScheme()).andReturn("http");
    expect(mockRequest.getServerName()).andReturn("the.server");
    expect(mockRequest.getServerPort()).andReturn(-1);
    replay(mockRequest);
    HttpServletRequest wrappedRequest = ManagedServletPipeline.wrapRequest(mockRequest, "/new-uri");
    assertEquals("/new-uri", wrappedRequest.getRequestURI());
    assertEquals("http://the.server/new-uri", wrappedRequest.getRequestURL().toString());
  }

  public final void testWrappedRequestUrlDefaultPort() {
    final HttpServletRequest mockRequest = createMock(HttpServletRequest.class);
    expect(mockRequest.getScheme()).andReturn("http");
    expect(mockRequest.getServerName()).andReturn("the.server");
    expect(mockRequest.getServerPort()).andReturn(80);
    replay(mockRequest);
    HttpServletRequest wrappedRequest = ManagedServletPipeline.wrapRequest(mockRequest, "/new-uri");
    assertEquals("/new-uri", wrappedRequest.getRequestURI());
    assertEquals("http://the.server/new-uri", wrappedRequest.getRequestURL().toString());
  }


  public final void testWrappedRequestUrlDefaultHttpsPort() {
    final HttpServletRequest mockRequest = createMock(HttpServletRequest.class);
    expect(mockRequest.getScheme()).andReturn("https");
    expect(mockRequest.getServerName()).andReturn("the.server");
    expect(mockRequest.getServerPort()).andReturn(443);
    replay(mockRequest);
    HttpServletRequest wrappedRequest = ManagedServletPipeline.wrapRequest(mockRequest, "/new-uri");
    assertEquals("/new-uri", wrappedRequest.getRequestURI());
    assertEquals("https://the.server/new-uri", wrappedRequest.getRequestURL().toString());
  }
}

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