1 files changed, 31 insertions, 0 deletions
diff --git a/src/mongo/db/repl/vote_requester_test.cpp b/src/mongo/db/repl/vote_requester_test.cpp
index 463d532759d..48c401dd876 100644
--- a/src/mongo/db/repl/vote_requester_test.cpp
+++ b/src/mongo/db/repl/vote_requester_test.cpp
@@ -651,6 +651,37 @@ TEST_F(VoteRequesterCatchupTakeoverDryRunTest, CatchupTakeoverPrimarySaysNoLoseE
     stopCapturingLogMessages();
 }
 
+TEST_F(VoteRequesterCatchupTakeoverDryRunTest,
+       CatchupTakeoverAllNodesRespondedMeansSufficientResponses) {
+    startCapturingLogMessages();
+    ASSERT_FALSE(hasReceivedSufficientResponses());
+
+    // Getting a good response from the other secondaries is insufficient.
+    processResponse(requestFrom("host2"), votedYes());
+    processResponse(requestFrom("host3"), votedYes());
+    processResponse(requestFrom("host4"), votedYes());
+    ASSERT_FALSE(hasReceivedSufficientResponses());
+
+    // Getting a bad response from the primary means all targets have responded, and so we have
+    // received sufficient responses.
+    processResponse(requestFrom("host1"), badRemoteCommandResponse());
+    ASSERT_EQUALS(
+        1,
+        countBSONFormatLogLinesIsSubset(BSON("attr" << BSON("failReason"
+                                                            << "failed to receive response"
+                                                            << "from"
+                                                            << "host1:27017"))));
+    ASSERT_TRUE(hasReceivedSufficientResponses());
+
+    // A bad response from the primary is equivalent to it saying NO.
+    ASSERT(VoteRequester::Result::kPrimaryRespondedNo == getResult());
+
+    // Only the secondaries are counted; the primary is excluded from the responders since it gave a
+    // bad response.
+    ASSERT_EQUALS(3, getNumResponders());
+    stopCapturingLogMessages();
+}
+
 }  // namespace
 }  // namespace repl
 }  // namespace mongo