Add PNaCl translation cache based on Chrome disk_cache

chrome/browser/nacl_host/pnacl_translation_cache_unittest.cc

+// Copyright (c) 2013 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 "chrome/browser/nacl_host/pnacl_translation_cache.h"
+
+#include "base/files/file_path.h"
+#include "base/files/scoped_temp_dir.h"
+#include "base/message_loop.h"
+#include "content/public/browser/browser_thread.h"
+#include "content/public/test/test_browser_thread.h"
+#include "net/base/test_completion_callback.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+using content::BrowserThread;
+
+namespace pnacl_cache {
+
+class PNaClTranslationCacheTest : public testing::Test {
+ protected:
+  PNaClTranslationCacheTest()
+      : cache_thread_(BrowserThread::CACHE, &message_loop_),
+        io_thread_(BrowserThread::IO, &message_loop_) {}
+  virtual ~PNaClTranslationCacheTest() {}
+  virtual void SetUp() { cache_ = new PNaClTranslationCache(); }
+  virtual void TearDown() { delete cache_; }
+
+ protected:
+  PNaClTranslationCache* cache_;
+  base::MessageLoopForIO message_loop_;
+  content::TestBrowserThread cache_thread_;
+  content::TestBrowserThread io_thread_;
+};
+
+TEST_F(PNaClTranslationCacheTest, StoreOneInMem) {
+  net::TestCompletionCallback init_cb;
+  int rv = cache_->InitCache(base::FilePath(), true, init_cb.callback());
+  EXPECT_EQ(net::OK, rv);
+  ASSERT_EQ(net::OK, init_cb.GetResult(rv));
+  net::TestCompletionCallback store_cb;
+  EXPECT_EQ(0, cache_->Size());
+  cache_->StoreNexe("1", "a", store_cb.callback());
+  // Using ERR_IO_PENDING here causes the callback to wait for the result
+  // which should be harmless even if it returns OK immediately. This is because
+  // we don't plumb the intermediate writing stages all the way out.
+  EXPECT_EQ(net::OK, store_cb.GetResult(net::ERR_IO_PENDING));
+  EXPECT_EQ(1, cache_->Size());
+}
+
+TEST_F(PNaClTranslationCacheTest, StoreOneOnDisk) {
+  base::ScopedTempDir temp_dir;
+  ASSERT_TRUE(temp_dir.CreateUniqueTempDir());
+  net::TestCompletionCallback init_cb;
+  int rv = cache_->InitCache(temp_dir.path(), false, init_cb.callback());
+  EXPECT_TRUE(rv);
+  ASSERT_EQ(net::OK, init_cb.GetResult(rv));
+  EXPECT_EQ(0, cache_->Size());
+  net::TestCompletionCallback store_cb;
+  cache_->StoreNexe("1", "a", store_cb.callback());
+  EXPECT_EQ(net::OK, store_cb.GetResult(net::ERR_IO_PENDING));
+  EXPECT_EQ(1, cache_->Size());
+}
+
+TEST_F(PNaClTranslationCacheTest, InMemSizeLimit) {
+  net::TestCompletionCallback init_cb;
+  int rv = cache_->InitCache(base::FilePath(), true, init_cb.callback());
+  EXPECT_EQ(rv, net::OK);
+  ASSERT_EQ(init_cb.GetResult(rv), net::OK);
+  EXPECT_EQ(cache_->Size(), 0);
+  std::string large_buffer(kMaxMemCacheSize + 1, 'a');
+  net::TestCompletionCallback store_cb;
+  cache_->StoreNexe("1", large_buffer, store_cb.callback());
+  EXPECT_EQ(net::ERR_FAILED, store_cb.GetResult(net::ERR_IO_PENDING));
+}
+
+}  // namespace nacl_cache