UI Changes to support clearing EME/CDM data

chrome/browser/browsing_data/media_licenses_counter_browsertest.cc

+// Copyright 2016 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/browsing_data/media_licenses_counter.h"
+
+#include "base/memory/ptr_util.h"
+#include "base/run_loop.h"
+#include "chrome/browser/ui/browser.h"
+#include "chrome/common/pref_names.h"
+#include "chrome/test/base/in_process_browser_test.h"
+#include "components/prefs/pref_service.h"
+#include "content/public/browser/browser_thread.h"
+#include "content/public/browser/storage_partition.h"
+#include "ppapi/shared_impl/ppapi_constants.h"
+#include "storage/browser/fileapi/async_file_util.h"
+#include "storage/browser/fileapi/file_system_context.h"
+#include "storage/browser/fileapi/file_system_operation_context.h"
+#include "storage/browser/fileapi/isolated_context.h"
+#include "storage/browser/quota/quota_manager.h"
+#include "storage/common/fileapi/file_system_util.h"
+#include "url/gurl.h"
+
+namespace {
+
+const char kTestOrigin[] = "https://host1/";
+const GURL kOrigin(kTestOrigin);
+const char kClearKeyCdmPluginId[] = "application_x-ppapi-clearkey-cdm";
+
+class MediaLicensesCounterTest : public InProcessBrowserTest {
+ public:
+  void SetUpOnMainThread() override { SetMediaLicenseDeletionPref(true); }
+
+  void SetMediaLicenseDeletionPref(bool value) {
+    browser()->profile()->GetPrefs()->SetBoolean(prefs::kDeleteMediaLicenses,
+                                                 value);
+  }
+
+  // Create some test data for origin |kOrigin|.
+  void CreateMediaLicenseTestData() {
+    storage::FileSystemContext* filesystem_context =
+        content::BrowserContext::GetDefaultStoragePartition(
+            browser()->profile())
+            ->GetFileSystemContext();
+    std::string clearkey_fsid =
+        CreateFileSystem(filesystem_context, kClearKeyCdmPluginId, kOrigin);
+    CreateFile(filesystem_context, kOrigin, clearkey_fsid, "foo");
+  }
+
+  // Start running and allow the asynchronous IO operations to complete.
+  void RunAndWaitForResult() {
+    DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
+    run_loop_.reset(new base::RunLoop());
+    run_loop_->Run();
+  }
+
+  // Callback from the counter.
+  void CountingCallback(std::unique_ptr<BrowsingDataCounter::Result> result) {
+    DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
+
+    callback_called_ = true;
+    finished_ = result->Finished();
+    if (finished_) {
+      MediaLicensesCounter::MediaLicenseResult* media_result =
+          static_cast<MediaLicensesCounter::MediaLicenseResult*>(result.get());
+      count_ = media_result->Value();
+      origin_ = media_result->GetOneOrigin();
+    }
+
+    if (run_loop_ && finished_)
+      run_loop_->Quit();
+  }
+
+  bool CallbackCalled() { return callback_called_; }
+
+  BrowsingDataCounter::ResultInt GetCount() {
+    DCHECK(finished_);
+    return count_;
+  }
+
+  const std::string& GetOrigin() {
+    DCHECK(finished_);
+    return origin_;
+  }
+
+ private:
+  // Creates a PluginPrivateFileSystem for the |plugin_name| and |origin|
+  // provided. Returns the file system ID for the created
+  // PluginPrivateFileSystem.
+  std::string CreateFileSystem(storage::FileSystemContext* filesystem_context,
+                               const std::string& plugin_name,
+                               const GURL& origin) {
+    std::string fsid = storage::IsolatedContext::GetInstance()
+                           ->RegisterFileSystemForVirtualPath(
+                               storage::kFileSystemTypePluginPrivate,
+                               ppapi::kPluginPrivateRootName, base::FilePath());
+    EXPECT_TRUE(storage::ValidateIsolatedFileSystemId(fsid));
+    filesystem_context->OpenPluginPrivateFileSystem(
+        origin, storage::kFileSystemTypePluginPrivate, fsid, plugin_name,
+        storage::OPEN_FILE_SYSTEM_CREATE_IF_NONEXISTENT,
+        base::Bind(&MediaLicensesCounterTest::OnFileSystemOpened,
+                   base::Unretained(this)));
+    RunAndWaitForResult();
+    return fsid;
+  }
+
+  // Creates a file named |file_name| in the PluginPrivateFileSystem identified
+  // by |origin| and |fsid|.
+  void CreateFile(storage::FileSystemContext* filesystem_context,
+                  const GURL& origin,
+                  const std::string& fsid,
+                  const std::string& file_name) {
+    std::string root = storage::GetIsolatedFileSystemRootURIString(
+        origin, fsid, ppapi::kPluginPrivateRootName);
+    storage::FileSystemURL file_url =
+        filesystem_context->CrackURL(GURL(root + file_name));
+    storage::AsyncFileUtil* file_util = filesystem_context->GetAsyncFileUtil(
+        storage::kFileSystemTypePluginPrivate);
+    std::unique_ptr<storage::FileSystemOperationContext> operation_context =
+        base::WrapUnique(
+            new storage::FileSystemOperationContext(filesystem_context));
+    operation_context->set_allowed_bytes_growth(
+        storage::QuotaManager::kNoLimit);
+    file_util->EnsureFileExists(
+        std::move(operation_context), file_url,
+        base::Bind(&MediaLicensesCounterTest::OnFileCreated,
+                   base::Unretained(this)));
+    RunAndWaitForResult();
+  }
+
+  void OnFileSystemOpened(base::File::Error result) {
+    EXPECT_EQ(base::File::FILE_OK, result) << base::File::ErrorToString(result);
+    if (run_loop_)
+      run_loop_->Quit();
+  }
+
+  void OnFileCreated(base::File::Error result, bool created) {
+    EXPECT_EQ(base::File::FILE_OK, result) << base::File::ErrorToString(result);
+    EXPECT_TRUE(created);
+    if (run_loop_)
+      run_loop_->Quit();
+  }
+
+  bool callback_called_ = false;
+  bool finished_ = false;
+  BrowsingDataCounter::ResultInt count_;
+  std::string origin_;
+
+  std::unique_ptr<base::RunLoop> run_loop_;
+};
+
+// Tests that for the empty file system, the result is zero.
+IN_PROC_BROWSER_TEST_F(MediaLicensesCounterTest, Empty) {
+  MediaLicensesCounter counter;
+  counter.Init(browser()->profile(),
+               base::Bind(&MediaLicensesCounterTest::CountingCallback,
+                          base::Unretained(this)));
+  counter.Restart();
+
+  RunAndWaitForResult();
+
+  EXPECT_TRUE(CallbackCalled());
+  EXPECT_EQ(0u, GetCount());
+  EXPECT_TRUE(GetOrigin().empty());
+}
+
+// Tests that for a non-empty file system, the result is nonzero.
+IN_PROC_BROWSER_TEST_F(MediaLicensesCounterTest, NonEmpty) {
+  CreateMediaLicenseTestData();
+
+  MediaLicensesCounter counter;
+  counter.Init(browser()->profile(),
+               base::Bind(&MediaLicensesCounterTest::CountingCallback,
+                          base::Unretained(this)));
+  counter.Restart();
+
+  RunAndWaitForResult();
+
+  EXPECT_TRUE(CallbackCalled());
+  EXPECT_EQ(1u, GetCount());
+  EXPECT_EQ(kOrigin.host(), GetOrigin());
+}
+
+// Tests that the counter does not count if the deletion preference is false.
+IN_PROC_BROWSER_TEST_F(MediaLicensesCounterTest, PrefIsFalse) {
+  SetMediaLicenseDeletionPref(false);
+
+  MediaLicensesCounter counter;
+  counter.Init(browser()->profile(),
+               base::Bind(&MediaLicensesCounterTest::CountingCallback,
+                          base::Unretained(this)));
+  counter.Restart();
+
+  EXPECT_FALSE(CallbackCalled());
+}
+
+// Tests that the counter starts counting automatically when the deletion
+// pref changes to true.
+IN_PROC_BROWSER_TEST_F(MediaLicensesCounterTest, PrefChanged) {
+  SetMediaLicenseDeletionPref(false);
+
+  MediaLicensesCounter counter;
+  counter.Init(browser()->profile(),
+               base::Bind(&MediaLicensesCounterTest::CountingCallback,
+                          base::Unretained(this)));
+  SetMediaLicenseDeletionPref(true);
+
+  RunAndWaitForResult();
+
+  EXPECT_TRUE(CallbackCalled());
+  EXPECT_EQ(0u, GetCount());
+  EXPECT_TRUE(GetOrigin().empty());
+}
+
+}  // namespace