Retry failed network requests.

net/url_request/url_request_job_unittest.cc

 // Copyright (c) 2012 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.
 
 #include "net/url_request/url_request_job.h"
 
+#include "base/basictypes.h"
 #include "net/http/http_transaction_unittest.h"
 #include "net/url_request/url_request_test_util.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace {
 
 // This is a header that signals the end of the data.
 const char kGzipGata[] = "\x1f\x08b\x08\0\0\0\0\0\0\3\3\0\0\0\0\0\0\0\0";
 
 void GZipServer(const net::HttpRequestInfo* request,
                 std::string* response_status, std::string* response_headers,
                 std::string* response_data) {
   response_data->assign(kGzipGata, sizeof(kGzipGata));
 }
 
+void NullServer(const net::HttpRequestInfo* request,
+                std::string* response_status,
+                std::string* response_headers,
+                std::string* response_data) {
+  FAIL();
+}
+
 const MockTransaction kGZip_Transaction = {
+  net::OK,
   "http://www.google.com/gzyp",
   "GET",
   base::Time(),
   "",
   net::LOAD_NORMAL,
   "HTTP/1.1 200 OK",
   "Cache-Control: max-age=10000\n"
   "Content-Encoding: gzip\n"
   "Content-Length: 30\n",  // Intentionally wrong.
   base::Time(),
@@ skipping 37 matching lines @@
 
   req.set_method("GET");
   req.Start();
 
   MessageLoop::current()->Run();
 
   EXPECT_TRUE(network_layer.done_reading_called());
 
   RemoveMockTransaction(&transaction);
 }
+
+// Tests that automatic retry triggers for certain errors on GETs, and is not
+// triggered for other errors or with other methods.
+TEST(URLRequestJob, RetryRequests) {
+  const struct {
+    net::Error transaction_result;
+    const char* method;
+    int expected_transaction_count;
+  } tests[] = {
+    {net::ERR_EMPTY_RESPONSE, "GET", 2},
+    {net::ERR_CONNECTION_REFUSED, "GET", 2},
+    {net::ERR_CONNECTION_REFUSED, "POST", 1},
+    {net::ERR_CONNECTION_REFUSED, "PUT", 1},
+    {net::ERR_ACCESS_DENIED, "GET", 1},
+    {net::ERR_CONTENT_DECODING_FAILED, "GET", 1},
+  };
+
+  for (size_t i = 0; i < ARRAYSIZE_UNSAFE(tests); ++i) {
+    const MockTransaction dead_transaction = {
+      tests[i].transaction_result,
+      "http://www.dead.com/",
+      tests[i].method,
+      base::Time(),
+      "",
+      net::LOAD_NORMAL,
+      "",
+      "",
+      base::Time(),
+      "",
+      TEST_MODE_NORMAL,
+      &NullServer,
+      0
+    };
+
+    MockNetworkLayer network_layer;
+    TestURLRequestContext context;
+    context.set_http_transaction_factory(&network_layer);
+
+    TestDelegate d;
+    TestURLRequest req(GURL(dead_transaction.url), &d, &context);
+    MockTransaction transaction(dead_transaction);
+    transaction.test_mode = TEST_MODE_SYNC_ALL;
+    AddMockTransaction(&transaction);
+
+    req.set_method(tests[i].method);
+    req.Start();
+
+    MessageLoop::current()->Run();
+
+    EXPECT_EQ(tests[i].expected_transaction_count,
+              network_layer.transaction_count());
+
+    RemoveMockTransaction(&transaction);
+  }
+}