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// Copyright The OpenTelemetry Authors
// SPDX-License-Identifier: Apache-2.0
package prometheus // import "go.opentelemetry.io/contrib/bridges/prometheus"
import (
"testing"
"github.com/prometheus/client_golang/prometheus"
"github.com/stretchr/testify/assert"
)
func TestNewConfig(t *testing.T) {
otherRegistry := prometheus.NewRegistry()
testCases := []struct {
name string
options []Option
wantConfig config
}{
{
name: "Default",
options: nil,
wantConfig: config{
gatherers: []prometheus.Gatherer{prometheus.DefaultGatherer},
},
},
{
name: "With a different gatherer",
options: []Option{WithGatherer(otherRegistry)},
wantConfig: config{
gatherers: []prometheus.Gatherer{otherRegistry},
},
},
{
name: "Multiple gatherers",
options: []Option{WithGatherer(otherRegistry), WithGatherer(prometheus.DefaultGatherer)},
wantConfig: config{
gatherers: []prometheus.Gatherer{otherRegistry, prometheus.DefaultGatherer},
},
},
}
for _, tt := range testCases {
t.Run(tt.name, func(t *testing.T) {
cfg := newConfig(tt.options...)
assert.Equal(t, tt.wantConfig, cfg)
})
}
}
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