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// Copyright 2025 The Prometheus Authors
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package otlptranslator
import (
"fmt"
"testing"
)
func TestNormalizeLabel(t *testing.T) {
tests := []struct {
label string
expected string
}{
{"", ""},
{"label:with:colons", "label_with_colons"},
{"LabelWithCapitalLetters", "LabelWithCapitalLetters"},
{"label!with&special$chars)", "label_with_special_chars_"},
{"label_with_foreign_characters_字符", "label_with_foreign_characters___"},
{"label.with.dots", "label_with_dots"},
{"123label", "key_123label"},
{"_label_starting_with_underscore", "key_label_starting_with_underscore"},
{"__label_starting_with_2underscores", "__label_starting_with_2underscores"},
}
for i, test := range tests {
t.Run(fmt.Sprintf("test_%d", i), func(t *testing.T) {
result := NormalizeLabel(test.label)
if test.expected != result {
t.Errorf("expected %s, got %s", test.expected, result)
}
})
}
}
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