Rewrite component update service in terms of components/update_client.

The goal of this change is to re-implement the component updater by
reusing the common code in components/update_client while keeping
the its public interface the same as before, in order to minimize
changes in its existing clients.

BUG=450337

Review URL: https://codereview.chromium.org/1133443002

Cr-Commit-Position: refs/heads/master@{#331412}

1 files changed, 61 insertions, 0 deletions

diff --git a/components/component_updater/timer_unittest.cc b/components/component_updater/timer_unittest.cc
new file mode 100644
index 0000000..2c80e84
--- /dev/null
+++ b/components/component_updater/timer_unittest.cc
@@ -0,0 +1,61 @@
+// Copyright 2015 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 <string>
+
+#include "base/message_loop/message_loop.h"
+#include "base/run_loop.h"
+#include "base/time/time.h"
+#include "components/component_updater/timer.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+using std::string;
+
+namespace component_updater {
+
+class ComponentUpdaterTimerTest : public testing::Test {
+ public:
+  ComponentUpdaterTimerTest() {}
+  ~ComponentUpdaterTimerTest() override {}
+
+ private:
+  base::MessageLoopForUI message_loop_;
+};
+
+TEST_F(ComponentUpdaterTimerTest, Start) {
+  class TimerClientFake {
+   public:
+    TimerClientFake(int max_count, const base::Closure& quit_closure)
+        : max_count_(max_count), quit_closure_(quit_closure), count_(0) {}
+
+    void OnTimerEvent() {
+      ++count_;
+      if (count_ >= max_count_)
+        quit_closure_.Run();
+    }
+
+    int count() const { return count_; }
+
+   private:
+    const int max_count_;
+    const base::Closure quit_closure_;
+
+    int count_;
+  };
+
+  base::RunLoop run_loop;
+  TimerClientFake timer_client_fake(3, run_loop.QuitClosure());
+  EXPECT_EQ(0, timer_client_fake.count());
+
+  Timer timer;
+  const base::TimeDelta delay(base::TimeDelta::FromMilliseconds(1));
+  timer.Start(delay, delay, base::Bind(&TimerClientFake::OnTimerEvent,
+                                       base::Unretained(&timer_client_fake)));
+  run_loop.Run();
+  timer.Stop();
+
+  EXPECT_EQ(3, timer_client_fake.count());
+}
+
+}  // namespace component_updater