Added the AutoEnrollmentClient and unit tests for it.

chrome/browser/policy/auto_enrollment_client_unittest.cc

Index: chrome/browser/policy/auto_enrollment_client_unittest.cc
diff --git a/chrome/browser/policy/auto_enrollment_client_unittest.cc b/chrome/browser/policy/auto_enrollment_client_unittest.cc
new file mode 100644
index 0000000000000000000000000000000000000000..742ad84858cdad51c604d860d699e0e3465d77be
--- /dev/null
+++ b/chrome/browser/policy/auto_enrollment_client_unittest.cc
@@ -0,0 +1,243 @@
+// Copyright (c) 2011 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/policy/auto_enrollment_client.h"
+
+#include "base/bind.h"
+#include "base/bind_helpers.h"
+#include "base/rand_util.h"
+#include "chrome/browser/policy/mock_device_management_backend.h"
+#include "chrome/browser/policy/mock_device_management_service.h"
+#include "crypto/sha2.h"
+#include "testing/gmock/include/gmock/gmock.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace policy {
+
+namespace {
+
+const char* kSerial = "serial";
+const char* kSerialHash =
+    "\x01\x44\xb1\xde\xfc\xf7\x56\x10\x87\x01\x5f\x8d\x83\x0d\x65\xb1"
+    "\x6f\x02\x4a\xd7\xeb\x92\x45\xfc\xd4\xe4\x37\xa1\x55\x2b\x13\x8a";
+
+using ::testing::AnyNumber;
+using ::testing::DoAll;
+using ::testing::InSequence;
+using ::testing::Invoke;
+using ::testing::Unused;
+using ::testing::_;
+
+ACTION_P(MockDeviceManagementBackendFailAutoEnrollment, error) {
+  arg2->OnError(error);
+}
+
+ACTION_P(MockDeviceManagementBackendSucceedAutoEnrollment, response) {
+  arg2->HandleAutoEnrollmentResponse(response);
+}
+
+class AutoEnrollmentClientTest : public testing::Test {
+ protected:
+  AutoEnrollmentClientTest()
+      : completion_callback_count_(0) {}
+
+  virtual void SetUp() OVERRIDE {
+    CreateClient(kSerial, 4, 8);
+  }
+
+  void CreateClient(const std::string& serial,
+                    int power_initial,
+                    int power_limit) {
+    MockDeviceManagementService* service = new MockDeviceManagementService;
+    EXPECT_CALL(*service, CreateBackend())
+      .Times(AnyNumber())
+      .WillRepeatedly(MockDeviceManagementServiceProxyBackend(&backend_));
+    base::Closure callback =
+        base::Bind(&AutoEnrollmentClientTest::CompletionCallback,
+                   base::Unretained(this));
+    client_.reset(new AutoEnrollmentClient(callback,
+                                           service,
+                                           serial,
+                                           power_initial,
+                                           power_limit));
+  }
+
+  void CompletionCallback() {
+    completion_callback_count_++;
+  }
+
+  void ServerWillFail(DeviceManagementBackend::ErrorCode error) {
+    EXPECT_CALL(backend_, ProcessAutoEnrollmentRequest(_, _, _))
+        .WillOnce(
+            DoAll(Invoke(this, &AutoEnrollmentClientTest::CaptureRequest),
+                  MockDeviceManagementBackendFailAutoEnrollment(error)));
+  }
+
+  void ServerWillReply(int64 modulus, bool with_hashes, bool with_serial_hash) {
+    em::DeviceAutoEnrollmentResponse response;
+    if (modulus >= 0)
+      response.set_modulus(modulus);
+    if (with_hashes) {
+      for (size_t i = 0; i < 10; ++i) {
+        std::string serial = "serial X";
+        serial[7] = '0' + i;
+        std::string hash = crypto::SHA256HashString(serial);
+        response.mutable_hashes()->Add()->assign(hash);
+      }
+    }
+    if (with_serial_hash) {
+      response.mutable_hashes()->Add()->assign(kSerialHash,
+                                               crypto::kSHA256Length);
+    }
+    EXPECT_CALL(backend_, ProcessAutoEnrollmentRequest(_, _, _))
+        .WillOnce(
+            DoAll(Invoke(this, &AutoEnrollmentClientTest::CaptureRequest),
+                  MockDeviceManagementBackendSucceedAutoEnrollment(response)));
+  }
+
+  MockDeviceManagementBackend backend_;
+  scoped_ptr<AutoEnrollmentClient> client_;
+  em::DeviceAutoEnrollmentRequest last_request_;
+  int completion_callback_count_;
+
+ private:
+  void CaptureRequest(
+      Unused,
+      const em::DeviceAutoEnrollmentRequest& request,
+      Unused) {
+    last_request_ = request;
+  }
+
+  DISALLOW_COPY_AND_ASSIGN(AutoEnrollmentClientTest);
+};
+
+TEST_F(AutoEnrollmentClientTest, NetworkFailure) {
+  ServerWillFail(DeviceManagementBackend::kErrorTemporaryUnavailable);
+  client_->Start();
+  EXPECT_FALSE(client_->should_auto_enroll());
+  EXPECT_EQ(1, completion_callback_count_);
+}
+
+TEST_F(AutoEnrollmentClientTest, EmptyReply) {
+  ServerWillReply(-1, false, false);
+  client_->Start();
+  EXPECT_FALSE(client_->should_auto_enroll());
+  EXPECT_EQ(1, completion_callback_count_);
+}
+
+TEST_F(AutoEnrollmentClientTest, ClientUploadsRightBits) {
+  ServerWillReply(-1, false, false);
+  client_->Start();
+  EXPECT_FALSE(client_->should_auto_enroll());
+  EXPECT_EQ(1, completion_callback_count_);
+  EXPECT_TRUE(last_request_.has_remainder());
+  EXPECT_TRUE(last_request_.has_modulus());
+  EXPECT_EQ(16, last_request_.modulus());
+  EXPECT_EQ(kSerialHash[31] & 0xf, last_request_.remainder());
+}
+
+TEST_F(AutoEnrollmentClientTest, AskForMoreThenFail) {
+  InSequence sequence;
+  ServerWillReply(32, false, false);
+  ServerWillFail(DeviceManagementBackend::kErrorTemporaryUnavailable);
+  client_->Start();
+  EXPECT_FALSE(client_->should_auto_enroll());
+  EXPECT_EQ(1, completion_callback_count_);
+}
+
+TEST_F(AutoEnrollmentClientTest, AskForMoreThenEvenMore) {
+  InSequence sequence;
+  ServerWillReply(32, false, false);
+  ServerWillReply(64, false, false);
+  client_->Start();
+  EXPECT_FALSE(client_->should_auto_enroll());
+  EXPECT_EQ(1, completion_callback_count_);
+}
+
+TEST_F(AutoEnrollmentClientTest, AskForLess) {
+  ServerWillReply(8, false, false);
+  client_->Start();
+  EXPECT_FALSE(client_->should_auto_enroll());
+  EXPECT_EQ(1, completion_callback_count_);
+}
+
+TEST_F(AutoEnrollmentClientTest, AskForSame) {
+  ServerWillReply(16, false, false);
+  client_->Start();
+  EXPECT_FALSE(client_->should_auto_enroll());
+  EXPECT_EQ(1, completion_callback_count_);
+}
+
+TEST_F(AutoEnrollmentClientTest, AskForTooMuch) {
+  ServerWillReply(512, false, false);
+  client_->Start();
+  EXPECT_FALSE(client_->should_auto_enroll());
+  EXPECT_EQ(1, completion_callback_count_);
+}
+
+TEST_F(AutoEnrollmentClientTest, AskNonPowerOf2) {
+  InSequence sequence;
+  ServerWillReply(100, false, false);
+  ServerWillReply(-1, false, false);
+  client_->Start();
+  EXPECT_FALSE(client_->should_auto_enroll());
+  EXPECT_EQ(1, completion_callback_count_);
+  EXPECT_TRUE(last_request_.has_remainder());
+  EXPECT_TRUE(last_request_.has_modulus());
+  EXPECT_EQ(128, last_request_.modulus());
+  EXPECT_EQ(kSerialHash[31] & 0x7f, last_request_.remainder());
+}
+
+TEST_F(AutoEnrollmentClientTest, ConsumerDevice) {
+  ServerWillReply(-1, true, false);
+  client_->Start();
+  EXPECT_FALSE(client_->should_auto_enroll());
+  EXPECT_EQ(1, completion_callback_count_);
+}
+
+TEST_F(AutoEnrollmentClientTest, EnterpriseDevice) {
+  ServerWillReply(-1, true, true);
+  client_->Start();
+  EXPECT_TRUE(client_->should_auto_enroll());
+  EXPECT_EQ(1, completion_callback_count_);
+}
+
+TEST_F(AutoEnrollmentClientTest, NoSerial) {
+  CreateClient("", 4, 8);
+  client_->Start();
+  EXPECT_FALSE(client_->should_auto_enroll());
+  EXPECT_EQ(1, completion_callback_count_);
+}
+
+TEST_F(AutoEnrollmentClientTest, NoBitsUploaded) {
+  CreateClient(kSerial, 0, 0);
+  ServerWillReply(-1, false, false);
+  client_->Start();
+  EXPECT_FALSE(client_->should_auto_enroll());
+  EXPECT_EQ(1, completion_callback_count_);
+  EXPECT_TRUE(last_request_.has_remainder());
+  EXPECT_TRUE(last_request_.has_modulus());
+  EXPECT_EQ(1, last_request_.modulus());
+  EXPECT_EQ(0, last_request_.remainder());
+}
+
+TEST_F(AutoEnrollmentClientTest, ManyBitsUploaded) {
+  int64 bottom62 = GG_LONGLONG(0x14e437a1552b138a);
+  for (int i = 0; i <= 62; ++i) {
+    completion_callback_count_ = 0;
+    CreateClient(kSerial, i, i);
+    ServerWillReply(-1, false, false);
+    client_->Start();
+    EXPECT_FALSE(client_->should_auto_enroll());
+    EXPECT_EQ(1, completion_callback_count_);
+    EXPECT_TRUE(last_request_.has_remainder());
+    EXPECT_TRUE(last_request_.has_modulus());
+    EXPECT_EQ((int64) 1 << i, last_request_.modulus());
+    EXPECT_EQ(bottom62 % ((int64) 1 << i), last_request_.remainder());
+  }
+}
+
+}  // namespace
+
+}  // namespace policy