import FIREFOX_52_6_0esr_RELEASE from mozilla-esr52 hg repo

toolkit/components/url-classifier/tests/gtest/TestSafeBrowsingProtobuf.cpp

@@ -0,0 +1,24 @@
+#include "safebrowsing.pb.h"
+#include "gtest/gtest.h"
+
+TEST(SafeBrowsingProtobuf, Empty)
+{
+  using namespace mozilla::safebrowsing;
+
+  const std::string CLIENT_ID = "firefox";
+
+  // Construct a simple update request.
+  FetchThreatListUpdatesRequest r;
+  r.set_allocated_client(new ClientInfo());
+  r.mutable_client()->set_client_id(CLIENT_ID);
+
+  // Then serialize.
+  std::string s;
+  r.SerializeToString(&s);
+
+  // De-serialize.
+  FetchThreatListUpdatesRequest r2;
+  r2.ParseFromString(s);
+
+  ASSERT_EQ(r2.client().client_id(), CLIENT_ID);
+}