Add the ability to clear the shader disk cache.

content/browser/gpu/shader_disk_cache_unittest.cc

+// Copyright 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 "base/files/scoped_temp_dir.h"
+#include "base/threading/thread.h"
+#include "content/browser/browser_thread_impl.h"
+#include "content/browser/gpu/shader_disk_cache.h"
+#include "net/base/test_completion_callback.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace content {
+namespace {
+
+const int kDefaultClientId = 42;
+const char kCacheKey[] = "key";
+const char kCacheValue[] = "cached value";
+
+}  // namespace
+
+class ShaderDiskCacheTest : public testing::Test {
+ public:
+  ShaderDiskCacheTest()
+      : cache_thread_(BrowserThread::CACHE, &message_loop_) {
+  }
+
+  virtual ~ShaderDiskCacheTest() {}
+
+  const base::FilePath& cache_path() { return temp_dir_.path(); }
+
+  void InitCache() {
+    ASSERT_TRUE(temp_dir_.CreateUniqueTempDir());
+    ShaderCacheFactory::GetInstance()->SetCacheInfo(kDefaultClientId,
+                                                        cache_path());
+  }
+
+ private:
+  virtual void TearDown() OVERRIDE {
+    ShaderCacheFactory::GetInstance()->RemoveCacheInfo(kDefaultClientId);
+  }
+
+  base::ScopedTempDir temp_dir_;
+  MessageLoopForIO message_loop_;
+  BrowserThreadImpl cache_thread_;
+
+  DISALLOW_COPY_AND_ASSIGN(ShaderDiskCacheTest);
+};
+
+TEST_F(ShaderDiskCacheTest, ClearsCache) {
+  InitCache();
+
+  scoped_refptr<ShaderDiskCache> cache =
+      ShaderCacheFactory::GetInstance()->Get(kDefaultClientId);
+  ASSERT_TRUE(cache.get() != NULL);
+
+  net::TestCompletionCallback available_cb;
+  int rv = cache->SetAvailableCallback(available_cb.callback());
+  ASSERT_EQ(net::OK, available_cb.GetResult(rv));
+  EXPECT_EQ(0, cache->Size());
+
+  cache->Cache(kCacheKey, kCacheValue);
+
+  net::TestCompletionCallback complete_cb;
+  rv = cache->SetCacheCompleteCallback(complete_cb.callback());
+  ASSERT_EQ(net::OK, complete_cb.GetResult(rv));
+  EXPECT_EQ(1, cache->Size());
+
+  base::Time time;
+  net::TestCompletionCallback clear_cb;
+  rv = cache->Clear(time, time, clear_cb.callback());
+  ASSERT_EQ(net::OK, clear_cb.GetResult(rv));
+  EXPECT_EQ(0, cache->Size());
+};
+
+}  // namespace content