Http Cache: chain GetLoadState from transactions waiting for...

net/http/http_cache_unittest.cc

 // Copyright (c) 2006-2010 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/http/http_cache.h"
 
 #include "base/hash_tables.h"
 #include "base/message_loop.h"
 #include "base/scoped_vector.h"
 #include "base/string_util.h"
@@ skipping 1378 matching lines @@
 
   std::vector<Context*> context_list;
   const int kNumTransactions = 5;
 
   for (int i = 0; i < kNumTransactions; ++i) {
     context_list.push_back(new Context());
     Context* c = context_list[i];
 
     c->result = cache.http_cache()->CreateTransaction(&c->trans);
     EXPECT_EQ(net::OK, c->result);
+    EXPECT_EQ(net::LOAD_STATE_IDLE, c->trans->GetLoadState());
 
     c->result = c->trans->Start(&request, &c->callback, net::BoundNetLog());
   }
 
+  // All requests are waiting for the active entry.
+  for (int i = 0; i < kNumTransactions; ++i) {
+    Context* c = context_list[i];
+    EXPECT_EQ(net::LOAD_STATE_WAITING_FOR_CACHE, c->trans->GetLoadState());
+  }
+
   // Allow all requests to move from the Create queue to the active entry.
   MessageLoop::current()->RunAllPending();
 
   // The first request should be a writer at this point, and the subsequent
   // requests should be pending.
 
   EXPECT_EQ(1, cache.network_layer()->transaction_count());
   EXPECT_EQ(0, cache.disk_cache()->open_count());
   EXPECT_EQ(1, cache.disk_cache()->create_count());
 
+  // All requests depend on the writer, and the writer is between Start and
+  // Read, i.e. idle.
+  for (int i = 0; i < kNumTransactions; ++i) {
+    Context* c = context_list[i];
+    EXPECT_EQ(net::LOAD_STATE_IDLE, c->trans->GetLoadState());
+  }
+
   for (int i = 0; i < kNumTransactions; ++i) {
     Context* c = context_list[i];
     if (c->result == net::ERR_IO_PENDING)
       c->result = c->callback.WaitForResult();
     ReadAndVerifyTransaction(c->trans.get(), kSimpleGET_Transaction);
   }
 
   // We should not have had to re-open the disk entry
 
   EXPECT_EQ(1, cache.network_layer()->transaction_count());
@@ skipping 3254 matching lines @@
   // Now return 200 when validating the entry so the metadata will be lost.
   MockTransaction trans2(kTypicalGET_Transaction);
   trans2.load_flags = net::LOAD_VALIDATE_CACHE;
   RunTransactionTestWithResponseInfo(cache.http_cache(), trans2, &response);
   EXPECT_TRUE(response.metadata.get() == NULL);
 
   EXPECT_EQ(3, cache.network_layer()->transaction_count());
   EXPECT_EQ(4, cache.disk_cache()->open_count());
   EXPECT_EQ(1, cache.disk_cache()->create_count());
 }