Define canonical enum for "HeliumResult" status values.

blimp/net/helium/helium_result_unittest.cc

Index: blimp/net/helium/helium_result_unittest.cc
diff --git a/blimp/net/helium/helium_result_unittest.cc b/blimp/net/helium/helium_result_unittest.cc
new file mode 100644
index 0000000000000000000000000000000000000000..22af5b22114cf4b31d4d3699c6fe46962cc5a009
--- /dev/null
+++ b/blimp/net/helium/helium_result_unittest.cc
@@ -0,0 +1,31 @@
+// 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 {}
+};
+
+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("OK", HeliumResultToString(HeliumResult::OK));
+  EXPECT_STREQ("ERR_FAILED", HeliumResultToString(HeliumResult::ERR_FAILED));
+  EXPECT_STREQ("ERR_CONNECTION_LOST",
+               HeliumResultToString(HeliumResult::ERR_CONNECTION_LOST));
+}
+
+}  // namespace
+}  // namespace blimp
+