cros: Added a fake fingerprint storage class.

chromeos/dbus/biod/biod_test_utils.h

Index: chromeos/dbus/biod/biod_test_utils.h
diff --git a/chromeos/dbus/biod/biod_test_utils.h b/chromeos/dbus/biod/biod_test_utils.h
new file mode 100644
index 0000000000000000000000000000000000000000..1320ad22a402c4980f167671da9403abdbcac147
--- /dev/null
+++ b/chromeos/dbus/biod/biod_test_utils.h
@@ -0,0 +1,87 @@
+// 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.
+
+#ifndef CHROMEOS_DBUS_BIOD_BIOD_TEST_UTILS_H_

[Daniel Erat, 2017/04/07 23:40:55]

consider renaming this file to test_utils to match the namespace

[sammiequon, 2017/04/11 17:11:37]

Done.

+#define CHROMEOS_DBUS_BIOD_BIOD_TEST_UTILS_H_
+
+#include <string>
+#include <vector>
+
+#include "base/macros.h"
+#include "chromeos/dbus/biod/biod_client.h"
+
+namespace dbus {
+class ObjectPath;
+}
+
+namespace chromeos {
+namespace test_utils {
+
+void CopyObjectPath(dbus::ObjectPath* dest_path,

[Daniel Erat, 2017/04/07 23:40:55]

add brief comments to all of these like:

  // Copies |src_path| to |dest_path|.

[sammiequon, 2017/04/08 00:43:32]

Done.

+                    const dbus::ObjectPath& src_path);
+
+void CopyObjectPathArray(std::vector<dbus::ObjectPath>* dest_object_paths,
+                         const std::vector<dbus::ObjectPath>& src_object_paths);
+
+void CopyNumRecords(int* out_num,
+                    const std::vector<dbus::ObjectPath>& object_path_array);
+
+void CopyLabel(std::string* expected_label, const std::string& src_label);

[Daniel Erat, 2017/04/07 23:40:55]

CopyString? it's not label-specific.

[sammiequon, 2017/04/08 00:43:32]

Done.

+
+// Implementation of BiodClient::Observer for testing.
+class TestBiodObserver : public BiodClient::Observer {
+ public:
+  TestBiodObserver();
+  ~TestBiodObserver() override;
+
+  bool CheckExpectedLastAttemptMatches(const AuthScanMatches& expected_matches);

[Daniel Erat, 2017/04/07 23:40:55]

nit: document what this dose; also move non-inlined methods below inlined
methods

[sammiequon, 2017/04/08 00:43:32]

Done.

+
+  int NumEnrollScansReceived() const;
+
+  int num_complete_enroll_scans_received() const {
+    return num_complete_enroll_scans_received_;
+  }
+

[Daniel Erat, 2017/04/07 23:40:55]

nit: remove blank lines between accessors

[sammiequon, 2017/04/08 00:43:32]

Done.

+  int num_incomplete_enroll_scans_received() const {
+    return num_incomplete_enroll_scans_received_;
+  }
+
+  int NumAuthScansReceived() const;
+
+  int num_matched_auth_scans_received() const {
+    return num_matched_auth_scans_received_;
+  }
+
+  int num_unmatched_auth_scans_received() const {
+    return num_unmatched_auth_scans_received_;
+  }
+
+  int num_failures_received() const { return num_failures_received_; }
+
+  // BiodClient::Observer:
+  void BiodServiceRestarted() override {}

[Daniel Erat, 2017/04/07 23:40:55]

move this empty impl to the .cc file:
https://www.chromium.org/developers/coding-style/cpp-dos-and-donts#TOC-Stop-i...

[sammiequon, 2017/04/08 00:43:32]

Done.

+  void BiodEnrollScanDoneReceived(biod::ScanResult scan_result,
+                                  bool is_complete) override;
+  void BiodAuthScanDoneReceived(biod::ScanResult scan_result,
+                                const AuthScanMatches& matches) override;
+

[Daniel Erat, 2017/04/07 23:40:55]

nit: delete extra blank line

[sammiequon, 2017/04/08 00:43:32]

Done.

+  void BiodSessionFailedReceived() override;
+
+ private:
+  int num_complete_enroll_scans_received_ = 0;
+  int num_incomplete_enroll_scans_received_ = 0;
+  int num_matched_auth_scans_received_ = 0;
+  int num_unmatched_auth_scans_received_ = 0;
+  int num_failures_received_ = 0;
+
+  // When auth scan is received, store the result.
+  AuthScanMatches last_auth_scan_matches_;
+
+  DISALLOW_COPY_AND_ASSIGN(TestBiodObserver);
+};
+
+}  // namespace test_utils
+}  // chromeos
+
+#endif  // CHROMEOS_DBUS_BIOD_BIOD_TEST_UTILS_H_