Add FingerprintUnlock KeyedService for each profile

chrome/browser/chromeos/login/quick_unlock/fingerprint_storage_unittest.cc

+// Copyright 2017 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/chromeos/login/quick_unlock/quick_unlock_factory.h"
+#include "chrome/browser/chromeos/login/quick_unlock/quick_unlock_storage.h"
+#include "chrome/browser/chromeos/login/quick_unlock/quick_unlock_utils.h"
+#include "chrome/common/pref_names.h"
+#include "chrome/test/base/testing_profile.h"
+#include "components/prefs/pref_service.h"
+#include "content/public/test/test_browser_thread_bundle.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace chromeos {
+namespace {
+
+class FingerprintStorageUnitTest : public testing::Test {
+ protected:
+  FingerprintStorageUnitTest() : profile_(new TestingProfile()) {}
+  ~FingerprintStorageUnitTest() override {}
+
+  // testing::Test:
+  void SetUp() override { quick_unlock::EnableForTesting(); }
+
+  content::TestBrowserThreadBundle thread_bundle_;
+  std::unique_ptr<TestingProfile> profile_;
+
+  DISALLOW_COPY_AND_ASSIGN(FingerprintStorageUnitTest);
+};
+
+}  // namespace
+
+// Provides test-only FingerprintStorage APIs.
+class FingerprintStorageTestApi {
+ public:
+  // Does *not* take ownership over |fingerprint_storage|.
+  explicit FingerprintStorageTestApi(
+      quick_unlock::FingerprintStorage* fingerprint_storage)
+      : fingerprint_storage_(fingerprint_storage) {}
+
+  void SetEnrollments(bool has_enrollments) {
+    fingerprint_storage_->has_enrollments_ = has_enrollments;
+  }
+
+  bool IsFingerprintAuthenticationAvailable() const {
+    return fingerprint_storage_->IsFingerprintAuthenticationAvailable();
+  }
+
+ private:
+  quick_unlock::FingerprintStorage* fingerprint_storage_;
+
+  DISALLOW_COPY_AND_ASSIGN(FingerprintStorageTestApi);
+};
+
+// Verifies that:
+// 1. Initial unlock attempt count is zero.
+// 2. Attempting unlock attempts correctly increases unlock attempt count.
+// 3. Resetting unlock attempt count correctly sets attempt count to 0.
+TEST_F(FingerprintStorageUnitTest, UnlockAttemptCount) {
+  quick_unlock::FingerprintStorage* fingerprint_storage =
+      quick_unlock::QuickUnlockFactory::GetForProfile(profile_.get())
+          ->fingerprint_storage();
+
+  EXPECT_EQ(0, fingerprint_storage->unlock_attempt_count());
+
+  fingerprint_storage->AddUnlockAttempt();
+  fingerprint_storage->AddUnlockAttempt();
+  fingerprint_storage->AddUnlockAttempt();
+  EXPECT_EQ(3, fingerprint_storage->unlock_attempt_count());
+
+  fingerprint_storage->ResetUnlockAttemptCount();
+  EXPECT_EQ(0, fingerprint_storage->unlock_attempt_count());
+}
+
+// Verifies that authentication is not available when
+// 1. No enrollments registered
+// 2. Too many authentication attempts
+TEST_F(FingerprintStorageUnitTest, AuthenticationUnAvailable) {
+  quick_unlock::FingerprintStorage* fingerprint_storage =
+      quick_unlock::QuickUnlockFactory::GetForProfile(profile_.get())
+          ->fingerprint_storage();
+  FingerprintStorageTestApi test_api(fingerprint_storage);
+
+  EXPECT_FALSE(fingerprint_storage->HasEnrollment());
+  test_api.SetEnrollments(true);
+  EXPECT_TRUE(fingerprint_storage->HasEnrollment());
+  EXPECT_EQ(0, fingerprint_storage->unlock_attempt_count());
+  EXPECT_TRUE(test_api.IsFingerprintAuthenticationAvailable());
+
+  // No enrollment registered makes fingerprint authentication unavailable.
+  test_api.SetEnrollments(false);
+  EXPECT_FALSE(test_api.IsFingerprintAuthenticationAvailable());
+  test_api.SetEnrollments(true);
+  EXPECT_TRUE(test_api.IsFingerprintAuthenticationAvailable());
+
+  // Too many authentication attempts make fingerprint authentication
+  // unavailable.
+  for (int i = 0; i < quick_unlock::FingerprintStorage::kMaximumUnlockAttempts;
+       ++i) {
+    fingerprint_storage->AddUnlockAttempt();
+  }
+  EXPECT_FALSE(test_api.IsFingerprintAuthenticationAvailable());
+  fingerprint_storage->ResetUnlockAttemptCount();
+  EXPECT_TRUE(test_api.IsFingerprintAuthenticationAvailable());
+}
+
+}  // namespace chromeos