Move streaming operator to namespace searched by ADL.

1 files changed, 4 insertions, 0 deletions

diff --git a/searchcore/src/tests/proton/common/pendinglidtracker_test.cpp b/searchcore/src/tests/proton/common/pendinglidtracker_test.cpp
index 575033ad19a..3b42a399888 100644
--- a/searchcore/src/tests/proton/common/pendinglidtracker_test.cpp
+++ b/searchcore/src/tests/proton/common/pendinglidtracker_test.cpp
@@ -12,6 +12,8 @@ constexpr uint32_t LID_1 = 1u;
 const std::vector<uint32_t> LIDV_2_1_3({2u, LID_1, 3u});
 const std::vector<uint32_t> LIDV_2_3({2u, 3u});
 
+namespace proton {
+
 std::ostream &
 operator << (std::ostream & os, ILidCommitState::State state) {
     switch (state) {
@@ -28,6 +30,8 @@ operator << (std::ostream & os, ILidCommitState::State state) {
     return os;
 }
 
+}
+
 void
 verifyPhase1ProduceAndNeedCommit(PendingLidTrackerBase & tracker, ILidCommitState::State expected) {
     EXPECT_EQUAL(ILidCommitState::State::COMPLETED, tracker.getState());