Simple Cache: avoid extraneous stream 0 (http header) writes.

net/disk_cache/entry_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 <utility>
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/files/file.h"
 #include "base/files/file_util.h"
@@ skipping 4202 matching lines @@
   scoped_refptr<net::IOBuffer> check_stream_1_data(
       new net::IOBuffer(stream_1_data.size()));
   EXPECT_EQ(
       static_cast<int>(stream_1_data.size()),
       ReadData(entry, 1, 0, check_stream_1_data.get(), stream_1_data.size()));
   EXPECT_EQ(0, stream_1_data.compare(0, std::string::npos,
                                      check_stream_1_data->data(),
                                      stream_1_data.size()));
 }
 
+TEST_F(DiskCacheEntryTest, SimpleCacheDoubleOpenWithoutKeySHA256) {
+  // This test runs as APP_CACHE to make operations more synchronous.
+  SetCacheType(net::APP_CACHE);
+  SetSimpleCacheMode();
+  InitCache();
+  disk_cache::Entry* entry;
+  std::string key("a key");
+  ASSERT_EQ(net::OK, CreateEntry(key, &entry));
+  entry->Close();
+
+  base::RunLoop().RunUntilIdle();
+  disk_cache::SimpleBackendImpl::FlushWorkerPoolForTesting();
+  base::RunLoop().RunUntilIdle();
+
+  EXPECT_TRUE(
+      disk_cache::simple_util::RemoveKeySHA256FromEntry(key, cache_path_));
+  ASSERT_EQ(net::OK, OpenEntry(key, &entry));
+  entry->Close();
+
+  base::RunLoop().RunUntilIdle();
+  disk_cache::SimpleBackendImpl::FlushWorkerPoolForTesting();
+  base::RunLoop().RunUntilIdle();
+
+  ASSERT_EQ(net::OK, OpenEntry(key, &entry));
+  entry->Close();
+}
+
 TEST_F(DiskCacheEntryTest, SimpleCacheReadCorruptKeySHA256) {
   // This test runs as APP_CACHE to make operations more synchronous.
   SetCacheType(net::APP_CACHE);
   SetSimpleCacheMode();
   InitCache();
   disk_cache::Entry* entry;
   std::string key("a key");
   ASSERT_EQ(net::OK, CreateEntry(key, &entry));
   entry->Close();
 
   base::RunLoop().RunUntilIdle();
   disk_cache::SimpleBackendImpl::FlushWorkerPoolForTesting();
   base::RunLoop().RunUntilIdle();
 
   EXPECT_TRUE(
       disk_cache::simple_util::CorruptKeySHA256FromEntry(key, cache_path_));
   EXPECT_NE(net::OK, OpenEntry(key, &entry));
 }