40 lines
1.5 KiB
Go
40 lines
1.5 KiB
Go
// Copyright 2025 PingCAP, Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package metricscommon
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import (
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"testing"
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"github.com/prometheus/client_golang/prometheus"
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"github.com/stretchr/testify/require"
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)
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func TestGetMergedConstLabels(t *testing.T) {
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bak := constLabels
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t.Cleanup(func() {
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constLabels = bak
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})
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SetConstLabels()
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require.EqualValues(t, prometheus.Labels{}, GetMergedConstLabels(nil))
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require.EqualValues(t, prometheus.Labels{"c": "3"}, GetMergedConstLabels(prometheus.Labels{"c": "3"}))
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SetConstLabels("a", "1", "b", "2")
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require.EqualValues(t, prometheus.Labels{"a": "1", "b": "2"}, GetMergedConstLabels(nil))
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require.EqualValues(t, prometheus.Labels{"a": "1", "b": "2"}, GetMergedConstLabels(prometheus.Labels{}))
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require.EqualValues(t, prometheus.Labels{"a": "1", "b": "2", "c": "3"}, GetMergedConstLabels(prometheus.Labels{"c": "3"}))
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// constLabels has higher priority
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require.EqualValues(t, prometheus.Labels{"a": "1", "b": "2"}, GetMergedConstLabels(prometheus.Labels{"a": "100"}))
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}
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