shithub: hugo

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related: Fix toLower

Don't change the slice.

Fixes #7198

--- a/related/inverted_index.go

+++ b/related/inverted_index.go

@@ -274,9 +274,12 @@

 		keywords = append(keywords, StringKeyword(vv))

 	case []string:

 		if toLower {

-			for i := 0; i < len(vv); i++ {

-				vv[i] = strings.ToLower(vv[i])

+			vc := make([]string, len(vv))

+			copy(vc, vv)

+			for i := 0; i < len(vc); i++ {

+				vc[i] = strings.ToLower(vc[i])

 			}

+			vv = vc

 		}

 		keywords = append(keywords, StringsToKeywords(vv...)...)

 	case time.Time:

--- a/related/inverted_index_test.go

+++ b/related/inverted_index_test.go

@@ -201,6 +201,21 @@

 }

+func TestToKeywordsToLower(t *testing.T) {

+	c := qt.New(t)

+	slice := []string{"A", "B", "C"}

+	config := IndexConfig{ToLower: true}

+	keywords, err := config.ToKeywords(slice)

+	c.Assert(err, qt.IsNil)

+	c.Assert(slice, qt.DeepEquals, []string{"A", "B", "C"})

+	c.Assert(keywords, qt.DeepEquals, []Keyword{

+		StringKeyword("a"),

+		StringKeyword("b"),

+		StringKeyword("c"),

+	})

+

+}

+

 func BenchmarkRelatedNewIndex(b *testing.B) {

 	pages := make([]*testDoc, 100)