From f96f37ab3684177e5147aad646e3239897dc4f3b Mon Sep 17 00:00:00 2001
From: Ben Boyter <ben@boyter.org>
Date: Thu, 11 Jun 2020 12:31:31 +1000
Subject: [PATCH] confirm rankers produce different scores

---
 processor/result_ranker_test.go | 26 ++++++++++++++++++++++++++
 1 file changed, 26 insertions(+)

diff --git a/processor/result_ranker_test.go b/processor/result_ranker_test.go
index 531dd83..ddfb4dd 100644
--- a/processor/result_ranker_test.go
+++ b/processor/result_ranker_test.go
@@ -62,6 +62,32 @@ func TestRankResultsTFIDFComparison(t *testing.T) {
 	}
 }
 
+func TestRankResultsRankerComparison(t *testing.T) {
+	ml1 := map[string][][]int{}
+	ml1["example"] = [][]int{{1}, {2}, {3}}
+
+	s := []*fileJob{
+		{
+			MatchLocations: ml1,
+			Location:       "/test/other.go",
+			Bytes:          12,
+		},
+	}
+
+	s = rankResultsTFIDF(2, s, calculateDocumentFrequency(s), true)
+	score1 := s[0].Score
+
+	s = rankResultsTFIDF(2, s, calculateDocumentFrequency(s), false)
+	score2 := s[0].Score
+
+	s = rankResultsBM25(2, s, calculateDocumentFrequency(s))
+	score3 := s[0].Score
+
+	if score1 == score2 || score1 == score3 || score2 == score3 {
+		t.Error("expected scores to be slightly different")
+	}
+}
+
 func TestRankResultsLocation(t *testing.T) {
 	ml := map[string][][]int{}
 	ml["test"] = [][]int{{1}, {2}, {3}}