[Cronet] Do not call into native adapter after it is destroyed in ChromiumUrlRequest.java

components/cronet/android/test/javatests/src/org/chromium/net/MockUrlRequestJobTest.java

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 package org.chromium.net;
 
 import android.test.suitebuilder.annotation.LargeTest;
 import android.test.suitebuilder.annotation.SmallTest;
 
 import org.chromium.base.test.util.Feature;
 
 import java.io.IOException;
 import java.nio.ByteBuffer;
 import java.util.HashMap;
 import java.util.List;
 import java.util.concurrent.Executors;
 
 /**
  * Tests that use mock URLRequestJobs to simulate URL requests.
  */
 public class MockUrlRequestJobTest extends CronetTestBase {
     private static final String TAG = "MockURLRequestJobTest";
 
     private CronetTestActivity mActivity;
     private MockUrlRequestJobFactory mMockUrlRequestJobFactory;
+    private TestHttpUrlRequestListener mListener;
+    private HttpUrlRequest mRequest;
 
     // Helper function to create a HttpUrlRequest with the specified url.
-    private TestHttpUrlRequestListener createRequestAndWaitForComplete(
+    private void createRequestAndWaitForComplete(
             String url, boolean disableRedirects) {
         HashMap<String, String> headers = new HashMap<String, String>();
-        TestHttpUrlRequestListener listener = new TestHttpUrlRequestListener();
-
-        HttpUrlRequest request = mActivity.mRequestFactory.createRequest(
+        mListener = new TestHttpUrlRequestListener();
+        mRequest = mActivity.mRequestFactory.createRequest(
                 url,
                 HttpUrlRequest.REQUEST_PRIORITY_MEDIUM,
                 headers,
-                listener);
+                mListener);
         if (disableRedirects) {
-            request.disableRedirects();
+            mRequest.disableRedirects();
         }
-        request.start();
-        listener.blockForComplete();
-        return listener;
+        mRequest.start();
+        mListener.blockForComplete();
     }
 
     @Override
     protected void setUp() throws Exception {
         super.setUp();
         mActivity = launchCronetTestApp();
         mMockUrlRequestJobFactory = new MockUrlRequestJobFactory(
                 getInstrumentation().getTargetContext());
     }
 
     @SmallTest
     @Feature({"Cronet"})
     public void testSuccessURLRequest() throws Exception {
-        TestHttpUrlRequestListener listener = createRequestAndWaitForComplete(
+        createRequestAndWaitForComplete(
                 MockUrlRequestJobFactory.SUCCESS_URL, false);
-        assertEquals(MockUrlRequestJobFactory.SUCCESS_URL, listener.mUrl);
-        assertEquals(200, listener.mHttpStatusCode);
-        assertEquals("OK", listener.mHttpStatusText);
+        assertEquals(MockUrlRequestJobFactory.SUCCESS_URL, mListener.mUrl);
+        assertEquals(200, mListener.mHttpStatusCode);
+        assertEquals("OK", mListener.mHttpStatusText);
         assertEquals("this is a text file\n",
-                new String(listener.mResponseAsBytes));
+                new String(mListener.mResponseAsBytes));
+        // Tests that ChromiumUrlRequest caches information which is available
+        // after the native request adapter has been destroyed.
+        assertEquals(200, mRequest.getHttpStatusCode());
+        assertEquals("OK", mRequest.getHttpStatusText());
+        assertNull(mRequest.getException());
     }
 
     @SmallTest
     @Feature({"Cronet"})
     public void testRedirectURLRequest() throws Exception {
-        TestHttpUrlRequestListener listener = createRequestAndWaitForComplete(
+        createRequestAndWaitForComplete(
                 MockUrlRequestJobFactory.REDIRECT_URL, false);
-
-        // Currently Cronet does not expose the url after redirect.
-        assertEquals(MockUrlRequestJobFactory.REDIRECT_URL, listener.mUrl);
-        assertEquals(200, listener.mHttpStatusCode);
-        assertEquals("OK", listener.mHttpStatusText);
+        // ChromiumUrlRequest does not expose the url after redirect.
+        assertEquals(MockUrlRequestJobFactory.REDIRECT_URL, mListener.mUrl);
+        assertEquals(200, mListener.mHttpStatusCode);
+        assertEquals("OK", mListener.mHttpStatusText);
         // Expect that the request is redirected to success.txt.
         assertEquals("this is a text file\n",
-                new String(listener.mResponseAsBytes));
+                new String(mListener.mResponseAsBytes));
+        // Tests that ChromiumUrlRequest caches information which is available
+        // after the native request adapter has been destroyed.
+        assertEquals(200, mRequest.getHttpStatusCode());
+        assertEquals("OK", mRequest.getHttpStatusText());
+        assertNull(mRequest.getException());
     }
 
     @SmallTest
     @Feature({"Cronet"})
     public void testNotFoundURLRequest() throws Exception {
-        TestHttpUrlRequestListener listener = createRequestAndWaitForComplete(
+        createRequestAndWaitForComplete(
                 MockUrlRequestJobFactory.NOTFOUND_URL, false);
-        assertEquals(MockUrlRequestJobFactory.NOTFOUND_URL, listener.mUrl);
-        assertEquals(404, listener.mHttpStatusCode);
-        assertEquals("Not Found", listener.mHttpStatusText);
+        assertEquals(MockUrlRequestJobFactory.NOTFOUND_URL, mListener.mUrl);
+        assertEquals(404, mListener.mHttpStatusCode);
+        assertEquals("Not Found", mListener.mHttpStatusText);
         assertEquals(
                 "<!DOCTYPE html>\n<html>\n<head>\n<title>Not found</title>\n"
                 + "<p>Test page loaded.</p>\n</head>\n</html>\n",
-                new String(listener.mResponseAsBytes));
+                new String(mListener.mResponseAsBytes));
+        // Tests that ChromiumUrlRequest caches information which is available
+        // after the native request adapter has been destroyed.
+        assertEquals(404, mRequest.getHttpStatusCode());
+        assertEquals("Not Found", mRequest.getHttpStatusText());
+        assertNull(mRequest.getException());
     }
 
     @SmallTest
     @Feature({"Cronet"})
     public void testFailedURLRequest() throws Exception {
-        TestHttpUrlRequestListener listener = createRequestAndWaitForComplete(
+        createRequestAndWaitForComplete(
                 MockUrlRequestJobFactory.FAILED_URL, false);
-
-        assertEquals(MockUrlRequestJobFactory.FAILED_URL, listener.mUrl);
-        assertEquals(null, listener.mHttpStatusText);
-        assertEquals(0, listener.mHttpStatusCode);
+        assertEquals(MockUrlRequestJobFactory.FAILED_URL, mListener.mUrl);
+        assertEquals("", mListener.mHttpStatusText);
+        assertEquals(0, mListener.mHttpStatusCode);
+        // Tests that ChromiumUrlRequest caches information which is available
+        // after the native request adapter has been destroyed.
+        assertEquals(0, mRequest.getHttpStatusCode());
+        assertEquals("", mRequest.getHttpStatusText());
+        Exception e = mRequest.getException();
+        assertEquals("System error: net::ERR_FAILED(-2)", e.getMessage());
     }
 
     @SmallTest
     @Feature({"Cronet"})
     // Test that redirect can be disabled for a request.
     public void testDisableRedirects() throws Exception {
-        TestHttpUrlRequestListener listener = createRequestAndWaitForComplete(
+        createRequestAndWaitForComplete(
                 MockUrlRequestJobFactory.REDIRECT_URL, true);
         // Currently Cronet does not expose the url after redirect.
-        assertEquals(MockUrlRequestJobFactory.REDIRECT_URL, listener.mUrl);
-        assertEquals(302, listener.mHttpStatusCode);
+        assertEquals(MockUrlRequestJobFactory.REDIRECT_URL, mListener.mUrl);
+        assertEquals(302, mListener.mHttpStatusCode);
+        // MockUrlRequestJob somehow does not populate status text as "Found".
+        assertEquals("", mListener.mHttpStatusText);
         // Expect that the request is not redirected to success.txt.
-        assertNotNull(listener.mResponseHeaders);
-        List<String> entry = listener.mResponseHeaders.get("redirect-header");
+        assertNotNull(mListener.mResponseHeaders);
+        List<String> entry = mListener.mResponseHeaders.get("redirect-header");
         assertEquals(1, entry.size());
         assertEquals("header-value", entry.get(0));
-        List<String> location = listener.mResponseHeaders.get("Location");
+        List<String> location = mListener.mResponseHeaders.get("Location");
         assertEquals(1, location.size());
         assertEquals("/success.txt", location.get(0));
         assertEquals("Request failed because there were too many redirects or "
                          + "redirects have been disabled",
-                     listener.mException.getMessage());
+                     mListener.mException.getMessage());
+        // Tests that ChromiumUrlRequest caches information which is available
+        // after the native request adapter has been destroyed.
+        assertEquals(302, mRequest.getHttpStatusCode());
+        // MockUrlRequestJob somehow does not populate status text as "Found".
+        assertEquals("", mRequest.getHttpStatusText());
+        Exception e = mRequest.getException();
+        assertNotNull(e);
+        assertEquals("Request failed because there were too many redirects "
+                + "or redirects have been disabled", e.getMessage());
     }

[mef, 2015/02/27 17:24:29]

check that get[All]Header[s] throw exception?

[xunjieli, 2015/02/27 19:17:33]

Done.

 
     /**
      * TestByteChannel is used for making sure write is not called after the
      * channel has been closed. Can synchronously cancel a request when write is
      * called.
      */
     static class TestByteChannel extends ChunkedWritableByteChannel {
         HttpUrlRequest mRequestToCancelOnWrite;
 
         @Override
@@ skipping 17 matching lines @@
          * Set request that will be synchronously canceled when write is called.
          */
         public void setRequestToCancelOnWrite(HttpUrlRequest request) {
             mRequestToCancelOnWrite = request;
         }
     }
 
     @LargeTest
     @Feature({"Cronet"})
     public void testNoWriteAfterCancelOnAnotherThread() throws Exception {
-        CronetTestActivity activity = launchCronetTestApp();
-
         // This test verifies that WritableByteChannel.write is not called after
         // WritableByteChannel.close if request is canceled from another
         // thread.
         for (int i = 0; i < 100; ++i) {
             HashMap<String, String> headers = new HashMap<String, String>();
             TestByteChannel channel = new TestByteChannel();
             TestHttpUrlRequestListener listener =
                     new TestHttpUrlRequestListener();
 
             // Create request.
             final HttpUrlRequest request =
-                    activity.mRequestFactory.createRequest(
+                    mActivity.mRequestFactory.createRequest(
                             MockUrlRequestJobFactory.SUCCESS_URL,
                             HttpUrlRequest.REQUEST_PRIORITY_LOW, headers,
                             channel, listener);
             request.start();
             listener.blockForStart();
             Runnable cancelTask = new Runnable() {
                 public void run() {
                     request.cancel();
                 }
             };
             Executors.newCachedThreadPool().execute(cancelTask);
             listener.blockForComplete();
             assertFalse(channel.isOpen());
+            // Tests that ChromiumUrlRequest caches information which is available
+            // after the native request adapter has been destroyed.
+            assertEquals(200, request.getHttpStatusCode());
+            assertEquals("OK", request.getHttpStatusText());
         }
     }
 
     @SmallTest
     @Feature({"Cronet"})
     public void testNoWriteAfterSyncCancel() throws Exception {
-        CronetTestActivity activity = launchCronetTestApp();
-
         HashMap<String, String> headers = new HashMap<String, String>();
         TestByteChannel channel = new TestByteChannel();
         TestHttpUrlRequestListener listener = new TestHttpUrlRequestListener();
 
         String data = "MyBigFunkyData";
         int dataLength = data.length();
         int repeatCount = 10000;
         String mockUrl = mMockUrlRequestJobFactory.getMockUrlForData(data,
                 repeatCount);
 
         // Create request.
         final HttpUrlRequest request =
-                activity.mRequestFactory.createRequest(
+                mActivity.mRequestFactory.createRequest(
                         mockUrl,
                         HttpUrlRequest.REQUEST_PRIORITY_LOW, headers,
                         channel, listener);
         // Channel will cancel the request from the network thread during the
         // first write.
         channel.setRequestToCancelOnWrite(request);
         request.start();
         listener.blockForComplete();
         assertTrue(request.isCanceled());
         assertFalse(channel.isOpen());
+        // Tests that ChromiumUrlRequest caches information which is available
+        // after the native request adapter has been destroyed.
+        assertEquals(-1, request.getHttpStatusCode());

[mef, 2015/02/27 17:24:29]

It is unclear why it expects -1 if default is 0.

[xunjieli, 2015/02/27 19:17:33]

This is returned by the native stack. Not very intuitive, but I'm not sure how
to make it better.

+        assertEquals("", request.getHttpStatusText());

[mef, 2015/02/27 17:24:29]

It is unclear why it expects "" if default is null.

[xunjieli, 2015/02/27 19:17:33]

The native stack never returns null. It returns empty string if there isn't a
status text. So as long as the request started, getHttpStatusText() won't return
null.

     }
 
     @SmallTest
     @Feature({"Cronet"})
     public void testBigDataSyncReadRequest() throws Exception {
         String data = "MyBigFunkyData";
         int dataLength = data.length();
         int repeatCount = 100000;
         String mockUrl = mMockUrlRequestJobFactory.getMockUrlForData(data,
                 repeatCount);
-        TestHttpUrlRequestListener listener = createRequestAndWaitForComplete(
-                mockUrl, false);
-        assertEquals(mockUrl, listener.mUrl);
-        String responseData = new String(listener.mResponseAsBytes);
+        createRequestAndWaitForComplete(mockUrl, false);
+        assertEquals(mockUrl, mListener.mUrl);
         for (int i = 0; i < repeatCount; ++i) {
-            assertEquals(data, responseData.substring(dataLength * i,
-                    dataLength * (i + 1)));
+            assertEquals(data, mListener.mResponseAsString.substring(
+                    dataLength * i, dataLength * (i + 1)));
         }
     }
 }