add tests

modules/repository/init.go

@@ -61,20 +61,19 @@ func mergeCustomLabels(fl optionFileList) []string {
 		return exts[filepath.Ext(fl.custom[i])] < exts[filepath.Ext(fl.custom[j])]
 	})
 
-	files := fl.all
-	if len(fl.custom) > 0 {
-		m := map[string]string{}
-		for _, f := range fl.all {
-			m[strings.TrimSuffix(f, filepath.Ext(f))] = f
-		}
-		for _, f := range fl.custom {
-			m[strings.TrimSuffix(f, filepath.Ext(f))] = f
-		}
-		files = make([]string, 0, len(m))
-		for _, f := range m {
-			files = append(files, f)
-		}
+	m := map[string]string{}
+	for _, f := range fl.all {
+		m[strings.TrimSuffix(f, filepath.Ext(f))] = f
+	}
+	for _, f := range fl.custom {
+		m[strings.TrimSuffix(f, filepath.Ext(f))] = f
 	}
+
+	files := make([]string, 0, len(m))
+	for _, f := range m {
+		files = append(files, f)
+	}
+
 	sort.Strings(files)
 	return files
 }

modules/repository/init_test.go

@@ -0,0 +1,30 @@
+// Copyright 2023 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package repository
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestMergeCustomLabels(t *testing.T) {
+	files := mergeCustomLabels(optionFileList{
+		all:    []string{"a", "a.yaml", "a.yml"},
+		custom: nil,
+	})
+	assert.EqualValues(t, []string{"a.yaml"}, files, "yaml file should win")
+
+	files = mergeCustomLabels(optionFileList{
+		all:    []string{"a", "a.yaml"},
+		custom: []string{"a"},
+	})
+	assert.EqualValues(t, []string{"a"}, files, "custom file should win")
+
+	files = mergeCustomLabels(optionFileList{
+		all:    []string{"a", "a.yml", "a.yaml"},
+		custom: []string{"a", "a.yml"},
+	})
+	assert.EqualValues(t, []string{"a.yml"}, files, "custom yml file should win if no yaml")
+}