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Java example source code file (FilterDefinitionTest.java)

This example Java source code file (FilterDefinitionTest.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

binding, filter, filterchain, filterconfig, filterdefinition, hashmap, http, httpservletrequest, injector, ioexception, mockfilter, override, request, response, servlet, servletexception, servletresponse, string, util

The FilterDefinitionTest.java Java example source code

package com.google.inject.servlet;

import static org.easymock.EasyMock.anyObject;
import static org.easymock.EasyMock.createMock;
import static org.easymock.EasyMock.expect;
import static org.easymock.EasyMock.replay;
import static org.easymock.EasyMock.verify;

import com.google.common.collect.ImmutableMap;
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.spi.BindingScopingVisitor;

import junit.framework.TestCase;

import java.io.IOException;
import java.util.Enumeration;
import java.util.HashMap;
import java.util.Map;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;

/**
 * Tests the lifecycle of the encapsulated {@link FilterDefinition} class.
 *
 * @author Dhanji R. Prasanna (dhanji@gmail com)
 */
public class FilterDefinitionTest extends TestCase {

  public final void testFilterInitAndConfig() throws ServletException {

    Injector injector = createMock(Injector.class);
    Binding binding = createMock(Binding.class);

    final MockFilter mockFilter = new MockFilter();

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

    expect(injector.getInstance(Key.get(Filter.class)))
        .andReturn(mockFilter)
        .anyTimes();

    replay(binding, injector);

    //some init params
    //noinspection SSBasedInspection
    final Map<String, String> initParams = new ImmutableMap.Builder()
      .put("ahsd", "asdas24dok")
      .put("ahssd", "asdasd124ok").build();

    ServletContext servletContext = createMock(ServletContext.class);
    final String contextName = "thing__!@@44";
    expect(servletContext.getServletContextName()).andReturn(contextName);

    replay(servletContext);

    String pattern = "/*";
    final FilterDefinition filterDef =
        new FilterDefinition(
            Key.get(Filter.class),
            UriPatternType.get(UriPatternType.SERVLET, pattern),
            initParams,
            null);
    filterDef.init(servletContext, injector, Sets.<Filter>newIdentityHashSet());

    assertTrue(filterDef.getFilter() instanceof MockFilter);
    final FilterConfig filterConfig = mockFilter.getConfig();
    assertTrue(null != filterConfig);
    assertEquals(filterConfig.getServletContext().getServletContextName(), contextName);
    assertEquals(filterConfig.getFilterName(), Key.get(Filter.class).toString());

    final Enumeration names = filterConfig.getInitParameterNames();
    while (names.hasMoreElements()) {
      String name = (String) names.nextElement();

      assertTrue(initParams.containsKey(name));
      assertEquals(filterConfig.getInitParameter(name), initParams.get(name));
    }

    verify(binding, injector, servletContext);
  }

  public final void testFilterCreateDispatchDestroy() throws ServletException, IOException {
    Injector injector = createMock(Injector.class);
    Binding binding = createMock(Binding.class);
    HttpServletRequest request = createMock(HttpServletRequest.class);

    final MockFilter mockFilter = new MockFilter();

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

    expect(injector.getInstance(Key.get(Filter.class)))
        .andReturn(mockFilter)
        .anyTimes();

    expect(request.getRequestURI()).andReturn("/index.html");
    expect(request.getContextPath())
        .andReturn("")
        .anyTimes();

    replay(injector, binding, request);

    String pattern = "/*";
    final FilterDefinition filterDef =
        new FilterDefinition(
            Key.get(Filter.class),
            UriPatternType.get(UriPatternType.SERVLET, pattern),
            new HashMap<String, String>(),
            null);
    //should fire on mockfilter now
    filterDef.init(createMock(ServletContext.class), injector, Sets.<Filter>newIdentityHashSet());
    assertTrue(filterDef.getFilter() instanceof MockFilter);

    assertTrue("Init did not fire", mockFilter.isInit());

    Filter matchingFilter = filterDef.getFilterIfMatching(request);
    assertSame(mockFilter, matchingFilter);

    final boolean proceed[] = new boolean[1];
    matchingFilter.doFilter(request, null, new FilterChainInvocation(null, null, null) {
      @Override
      public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse) {
        proceed[0] = true;
      }
    });

    assertTrue("Filter did not proceed down chain", proceed[0]);

    filterDef.destroy(Sets.<Filter>newIdentityHashSet());
    assertTrue("Destroy did not fire", mockFilter.isDestroy());

    verify(injector, request);

  }

  public final void testFilterCreateDispatchDestroySupressChain()
      throws ServletException, IOException {

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

    final MockFilter mockFilter = new MockFilter() {
      @Override
      public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse,
          FilterChain filterChain) {
        //suppress rest of chain...
      }
    };

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

    expect(injector.getInstance(Key.get(Filter.class)))
        .andReturn(mockFilter)
        .anyTimes();

    expect(request.getRequestURI()).andReturn("/index.html");
    expect(request.getContextPath())
        .andReturn("")
        .anyTimes();

    replay(injector, binding, request);

    String pattern = "/*";
    final FilterDefinition filterDef =
        new FilterDefinition(
            Key.get(Filter.class),
            UriPatternType.get(UriPatternType.SERVLET, pattern),
            new HashMap<String, String>(),
            null);
    //should fire on mockfilter now
    filterDef.init(createMock(ServletContext.class), injector, Sets.<Filter>newIdentityHashSet());
    assertTrue(filterDef.getFilter() instanceof MockFilter);


    assertTrue("init did not fire", mockFilter.isInit());

    Filter matchingFilter = filterDef.getFilterIfMatching(request);
    assertSame(mockFilter, matchingFilter);

    final boolean proceed[] = new boolean[1];
    matchingFilter.doFilter(request, null, new FilterChainInvocation(null, null, null) {
      @Override
      public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse) {
        proceed[0] = true;
      }
    });

    assertFalse("filter did not suppress chain", proceed[0]);

    filterDef.destroy(Sets.<Filter>newIdentityHashSet());
    assertTrue("destroy did not fire", mockFilter.isDestroy());

    verify(injector, request);

  }

  public void testGetFilterIfMatching() throws ServletException {
    String pattern = "/*";
    final FilterDefinition filterDef =
        new FilterDefinition(
            Key.get(Filter.class),
            UriPatternType.get(UriPatternType.SERVLET, pattern),
            new HashMap<String, String>(),
            null);
    HttpServletRequest servletRequest = createMock(HttpServletRequest.class);
    ServletContext servletContext = createMock(ServletContext.class);
    Injector injector = createMock(Injector.class);
    Binding binding = createMock(Binding.class);

    final MockFilter mockFilter = new MockFilter() {
      @Override
      public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse,
          FilterChain filterChain) {
        //suppress rest of chain...
      }
    };
    expect(injector.getBinding(Key.get(Filter.class)))
        .andReturn(binding);
    expect(binding.acceptScopingVisitor((BindingScopingVisitor) anyObject()))
        .andReturn(true);
    expect(injector.getInstance(Key.get(Filter.class)))
        .andReturn(mockFilter)
        .anyTimes();

    expect(servletRequest.getContextPath()).andReturn("/a_context_path");
    expect(servletRequest.getRequestURI()).andReturn("/a_context_path/test.html");

    replay(servletRequest, binding, injector);
    filterDef.init(servletContext, injector, Sets.<Filter>newIdentityHashSet());
    Filter filter = filterDef.getFilterIfMatching(servletRequest);
    assertSame(filter, mockFilter);
    verify(servletRequest, binding, injector);
  }

  public void testGetFilterIfMatchingNotMatching() throws ServletException {
    String pattern = "/*";
    final FilterDefinition filterDef =
        new FilterDefinition(
            Key.get(Filter.class),
            UriPatternType.get(UriPatternType.SERVLET, pattern),
            new HashMap<String, String>(),
            null);
    HttpServletRequest servletRequest = createMock(HttpServletRequest.class);
    ServletContext servletContext = createMock(ServletContext.class);
    Injector injector = createMock(Injector.class);
    Binding binding = createMock(Binding.class);

    final MockFilter mockFilter = new MockFilter() {
      @Override
      public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse,
          FilterChain filterChain) {
        //suppress rest of chain...
      }
    };
    expect(injector.getBinding(Key.get(Filter.class)))
        .andReturn(binding);
    expect(binding.acceptScopingVisitor((BindingScopingVisitor) anyObject()))
        .andReturn(true);
    expect(injector.getInstance(Key.get(Filter.class)))
        .andReturn(mockFilter)
        .anyTimes();

    expect(servletRequest.getContextPath()).andReturn("/a_context_path");
    expect(servletRequest.getRequestURI()).andReturn("/test.html");

    replay(servletRequest, binding, injector);
    filterDef.init(servletContext, injector, Sets.<Filter>newIdentityHashSet());
    Filter filter = filterDef.getFilterIfMatching(servletRequest);
    assertNull(filter);
    verify(servletRequest, binding, injector);
  }

  private static class MockFilter implements Filter {
    private boolean init;
    private boolean destroy;
    private FilterConfig config;

    public void init(FilterConfig filterConfig) {
      init = true;

      this.config = filterConfig;
    }

    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse,
        FilterChain filterChain) throws IOException, ServletException {
      //proceed
      filterChain.doFilter(servletRequest, servletResponse);
    }

    public void destroy() {
      destroy = true;
    }

    public boolean isInit() {
      return init;
    }

    public boolean isDestroy() {
      return destroy;
    }

    public FilterConfig getConfig() {
      return config;
    }
  }
}

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