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// Copyright The OpenTelemetry Authors
// SPDX-License-Identifier: Apache-2.0
package prometheus // import "go.opentelemetry.io/otel/exporters/prometheus"
import (
"context"
"testing"
"github.com/prometheus/client_golang/prometheus"
"github.com/stretchr/testify/assert"
"go.opentelemetry.io/otel/sdk/metric"
"go.opentelemetry.io/otel/sdk/metric/metricdata"
)
func TestNewConfig(t *testing.T) {
registry := prometheus.NewRegistry()
aggregationSelector := func(metric.InstrumentKind) metric.Aggregation { return nil }
producer := &noopProducer{}
testCases := []struct {
name string
options []Option
wantConfig config
}{
{
name: "Default",
options: nil,
wantConfig: config{
registerer: prometheus.DefaultRegisterer,
},
},
{
name: "WithRegisterer",
options: []Option{
WithRegisterer(registry),
},
wantConfig: config{
registerer: registry,
},
},
{
name: "WithAggregationSelector",
options: []Option{
WithAggregationSelector(aggregationSelector),
},
wantConfig: config{
registerer: prometheus.DefaultRegisterer,
readerOpts: []metric.ManualReaderOption{metric.WithAggregationSelector(aggregationSelector)},
},
},
{
name: "WithProducer",
options: []Option{
WithProducer(producer),
},
wantConfig: config{
registerer: prometheus.DefaultRegisterer,
readerOpts: []metric.ManualReaderOption{metric.WithProducer(producer)},
},
},
{
name: "With Multiple Options",
options: []Option{
WithRegisterer(registry),
WithAggregationSelector(aggregationSelector),
WithProducer(producer),
},
wantConfig: config{
registerer: registry,
readerOpts: []metric.ManualReaderOption{
metric.WithAggregationSelector(aggregationSelector),
metric.WithProducer(producer),
},
},
},
{
name: "nil options do nothing",
options: []Option{
WithRegisterer(nil),
},
wantConfig: config{
registerer: prometheus.DefaultRegisterer,
},
},
{
name: "without target_info metric",
options: []Option{
WithoutTargetInfo(),
},
wantConfig: config{
registerer: prometheus.DefaultRegisterer,
disableTargetInfo: true,
},
},
{
name: "unit suffixes disabled",
options: []Option{
WithoutUnits(),
},
wantConfig: config{
registerer: prometheus.DefaultRegisterer,
withoutUnits: true,
},
},
{
name: "with namespace",
options: []Option{
WithNamespace("test"),
},
wantConfig: config{
registerer: prometheus.DefaultRegisterer,
namespace: "test_",
},
},
{
name: "with namespace with trailing underscore",
options: []Option{
WithNamespace("test_"),
},
wantConfig: config{
registerer: prometheus.DefaultRegisterer,
namespace: "test_",
},
},
{
name: "with unsanitized namespace",
options: []Option{
WithNamespace("test/"),
},
wantConfig: config{
registerer: prometheus.DefaultRegisterer,
namespace: "test_",
},
},
}
for _, tt := range testCases {
t.Run(tt.name, func(t *testing.T) {
cfg := newConfig(tt.options...)
// only check the length of readerOpts, since they are not comparable
assert.Equal(t, len(tt.wantConfig.readerOpts), len(cfg.readerOpts))
cfg.readerOpts = nil
tt.wantConfig.readerOpts = nil
assert.Equal(t, tt.wantConfig, cfg)
})
}
}
type noopProducer struct{}
func (*noopProducer) Produce(ctx context.Context) ([]metricdata.ScopeMetrics, error) {
return nil, nil
}
|
