Define canonical enum for "HeliumResult" status values.

blimp/net/helium/helium_result_unittest.cc

+// Copyright 2016 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 "blimp/net/helium/helium_result.h"
+
+#include "base/macros.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace blimp {
+namespace {
+
+class HeliumResultTest : public testing::Test {
+ public:
+  HeliumResultTest() {}
+  ~HeliumResultTest() override {}

[Wez, 2016/10/08 00:44:53]

Do we need a test fixture base, given that it doesn't actually do anything, and
has no members?

+};
+
+TEST_F(HeliumResultTest, HeliumResultToString) {
+  // The exhaustive list of errors need not be specified here, but enough are
+  // specified that we can verify that the switch/case mapping works as
+  // intended.
+  EXPECT_STREQ("SUCCESS", HeliumResultToString(HeliumResult::SUCCESS));
+  EXPECT_STREQ("ERR_INTERNAL_ERROR",
+               HeliumResultToString(HeliumResult::ERR_INTERNAL_ERROR));
+  EXPECT_STREQ("ERR_DISCONNECTED",
+               HeliumResultToString(HeliumResult::ERR_DISCONNECTED));
+}
+
+}  // namespace
+}  // namespace blimp