Generate Instance ID locally.

components/gcm_driver/instance_id/instance_id_driver_unittest.cc

+// 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 "components/gcm_driver/instance_id/instance_id_driver.h"
+
+#include "base/bind.h"
+#include "base/message_loop/message_loop.h"
+#include "base/run_loop.h"
+#include "components/gcm_driver/instance_id/instance_id.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace instance_id {
+
+const char kTestAppID1[] = "TestApp1";
+const char kTestAppID2[] = "TestApp2";
+
+class InstanceIDDriverTest : public testing::Test {
+ public:
+  InstanceIDDriverTest();
+  ~InstanceIDDriverTest() override;
+
+  // testing::Test:
+  void SetUp() override;
+
+  void WaitForAsyncOperation();
+
+  void DeleteIDCompleted(InstanceID* instance_id, InstanceID::Result result);
+
+  InstanceIDDriver* driver() const { return driver_.get(); }
+  InstanceID::Result delete_id_result() const { return delete_id_result_; }
+
+ private:
+  base::MessageLoopForUI message_loop_;
+  scoped_ptr<InstanceIDDriver> driver_;
+  InstanceID::Result delete_id_result_;
+  base::Closure async_operation_completed_callback_;
+
+  DISALLOW_COPY_AND_ASSIGN(InstanceIDDriverTest);
+};
+
+InstanceIDDriverTest::InstanceIDDriverTest()
+    : delete_id_result_(InstanceID::UNKNOWN_ERROR) {
+}
+
+InstanceIDDriverTest::~InstanceIDDriverTest() {
+}
+
+void InstanceIDDriverTest::SetUp() {
+  driver_.reset(new InstanceIDDriver());
+}
+
+void InstanceIDDriverTest::WaitForAsyncOperation() {
+  base::RunLoop run_loop;
+  async_operation_completed_callback_ = run_loop.QuitClosure();
+  run_loop.Run();
+}
+
+void InstanceIDDriverTest::DeleteIDCompleted(InstanceID* instance_id,
+                                             InstanceID::Result result) {
+  delete_id_result_ = result;
+  if (!async_operation_completed_callback_.is_null())
+    async_operation_completed_callback_.Run();
+}
+
+TEST_F(InstanceIDDriverTest, NewID) {
+  // New ID is generated for the first time.
+  InstanceID* instance_id1 = driver()->GetInstanceID(kTestAppID1);
+  std::string id1 = instance_id1->GetID();
+  EXPECT_FALSE(id1.empty());
+  base::Time creation_time1 = instance_id1->GetCreationTime();
+  EXPECT_FALSE(creation_time1.is_null());

[fgorski, 2015/04/30 22:13:11]

you can take before and after time and check that creation_time1 is between the
two.

[jianli, 2015/05/02 00:30:17]

I don't think this is safe since it might be likely that the time value remains
same on a fast computer.

+
+  // Same ID is returned for the same app.
+  EXPECT_EQ(id1, instance_id1->GetID());
+  EXPECT_EQ(creation_time1, instance_id1->GetCreationTime());
+
+  // New ID is generated for another app.
+  InstanceID* instance_id2 = driver()->GetInstanceID(kTestAppID2);
+  std::string id2 = instance_id2->GetID();
+  EXPECT_FALSE(id2.empty());

[fgorski, 2015/04/30 22:13:12]

can we check that created ids:
* are of certain length
* consist of a limited set of characters (are URL safe)

[jianli, 2015/05/02 00:30:17]

We don't have a strict guideline for length. Added check for chars.

+  EXPECT_NE(id1, id2);
+}
+
+TEST_F(InstanceIDDriverTest, DeleteID) {
+  InstanceID* instance_id = driver()->GetInstanceID(kTestAppID1);
+  std::string id1 = instance_id->GetID();
+  EXPECT_FALSE(id1.empty());
+
+  // New ID will be generated from GetID after calling DeleteID.
+  instance_id->DeleteID(base::Bind(&InstanceIDDriverTest::DeleteIDCompleted,
+                                   base::Unretained(this)));
+  WaitForAsyncOperation();
+  EXPECT_EQ(InstanceID::SUCCESS, delete_id_result());
+
+  std::string id2 = instance_id->GetID();
+  EXPECT_FALSE(id2.empty());
+  EXPECT_NE(id1, id2);
+}
+
+}  // instance_id