1 files changed, 40 insertions, 0 deletions
diff --git a/chromium/chrome/browser/signin/chrome_device_id_helper_unittest.cc b/chromium/chrome/browser/signin/chrome_device_id_helper_unittest.cc
new file mode 100644
index 00000000000..3e2f2e9517b
--- /dev/null
+++ b/chromium/chrome/browser/signin/chrome_device_id_helper_unittest.cc
@@ -0,0 +1,40 @@
+// Copyright 2018 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/signin/chrome_device_id_helper.h"
+
+#include <string>
+
+#include "base/strings/string_util.h"
+#include "build/build_config.h"
+#include "build/chromeos_buildflags.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+#if BUILDFLAG(IS_CHROMEOS_ASH)
+const char kEpehemeralPrefix[] = "t_";
+
+TEST(DeviceIdHelper, NotEphemeral) {
+  std::string device_id =
+      GenerateSigninScopedDeviceId(false /* for_ephemeral */);
+  // Not empty.
+  EXPECT_FALSE(device_id.empty());
+  // No ephemeral prefix.
+  EXPECT_FALSE(base::StartsWith(device_id, kEpehemeralPrefix,
+                                base::CompareCase::SENSITIVE));
+  // ID is unique.
+  EXPECT_NE(device_id, GenerateSigninScopedDeviceId(false /* for_ephemeral */));
+}
+
+TEST(DeviceIdHelper, Ephemeral) {
+  std::string device_id =
+      GenerateSigninScopedDeviceId(true /* for_ephemeral */);
+  // Ephemeral prefix.
+  EXPECT_TRUE(base::StartsWith(device_id, kEpehemeralPrefix,
+                               base::CompareCase::SENSITIVE));
+  // Not empty.
+  EXPECT_NE(device_id, kEpehemeralPrefix);
+  // ID is unique.
+  EXPECT_NE(device_id, GenerateSigninScopedDeviceId(true /* for_ephemeral */));
+}
+#endif