Implement the private API for quick unlock.

chrome/browser/chromeos/extensions/quick_unlock_private/quick_unlock_private_api_test.cc

Index: chrome/browser/chromeos/extensions/quick_unlock_private/quick_unlock_private_api_test.cc
diff --git a/chrome/browser/chromeos/extensions/quick_unlock_private/quick_unlock_private_api_test.cc b/chrome/browser/chromeos/extensions/quick_unlock_private/quick_unlock_private_api_test.cc
new file mode 100644
index 0000000000000000000000000000000000000000..1face558535438df0df1b950188541f9eebca6aa
--- /dev/null
+++ b/chrome/browser/chromeos/extensions/quick_unlock_private/quick_unlock_private_api_test.cc
@@ -0,0 +1,42 @@
+// Copyright (c) 2016 The Chromium Authors. All rights reserved.

[Devlin, 2016/05/31 22:58:38]

no (c)

[jdufault, 2016/06/01 00:07:35]

Done.

+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// This file tests the chromeos.quickUnlockPrivate extension API.
+
+#include "chrome/browser/chromeos/extensions/quick_unlock_private/quick_unlock_private_api.h"
+
+#include "chrome/browser/extensions/extension_apitest.h"
+#include "chromeos/login/auth/fake_extended_authenticator.h"
+#include "chromeos/login/auth/user_context.h"
+#include "components/signin/core/account_id/account_id.h"
+
+using namespace extensions;
+
+namespace chromeos {
+namespace {
+const char* kTestUserEmail = "testuser@gmail.com";
+const char* kTestUserPassword = "valid";
+}
+
+class QuickUnlockPrivateApiTest : public ExtensionApiTest {};
+
+IN_PROC_BROWSER_TEST_F(QuickUnlockPrivateApiTest, ApiTests) {

[Devlin, 2016/05/31 22:58:38]

Could these be unittests?

[jdufault, 2016/06/01 00:07:35]

I may be able to do something like the wallpaper private API unit tests[1], but
I haven't played around with it much. If you prefer that approach, I can
investigate it.

1:
https://code.google.com/p/chromium/codesearch#chromium/src/chrome/browser/chr...

[Devlin, 2016/06/01 17:44:12]

Please do look into using unittests.  The wallpaper ones aren't a great example,
because they mock out too much of the system.  Instead, use the utilities in
api_test_utils.h.  I think the management api and developer private api are
decent examples of unittesting api functions.

+  // Setup a fake authenticator for testing. This enables testing of
+  // quickUnlockPrivate.checkPassword.
+  QuickUnlockPrivateSetModesFunction::SetCreateAuthenticatorForTesting(
+      [](chromeos::AuthStatusConsumer* auth_status_consumer) {
+        AccountId account_id = AccountId::FromUserEmail(kTestUserEmail);
+        chromeos::UserContext expected_context(account_id);
+        expected_context.SetKey(Key(kTestUserPassword));
+
+        chromeos::ExtendedAuthenticator* authenticator =
+            new chromeos::FakeExtendedAuthenticator(auth_status_consumer,
+                                                    expected_context);
+        return authenticator;
+      });
+
+  ASSERT_TRUE(RunExtensionTest("quick_unlock_private/apiTests")) << message_;
+}
+
+}  // namespace chromeos