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test_test.go
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test_test.go
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// Copyright The OpenTelemetry 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 processortest_test
import (
"context"
"testing"
"github.com/stretchr/testify/require"
"go.opentelemetry.io/otel/attribute"
"go.opentelemetry.io/otel/metric/instrument"
"go.opentelemetry.io/otel/sdk/instrumentation"
metricsdk "go.opentelemetry.io/otel/sdk/metric"
"go.opentelemetry.io/otel/sdk/metric/export"
"go.opentelemetry.io/otel/sdk/metric/export/aggregation"
"go.opentelemetry.io/otel/sdk/metric/processor/processortest"
"go.opentelemetry.io/otel/sdk/metric/sdkapi"
"go.opentelemetry.io/otel/sdk/resource"
)
func generateTestData(t *testing.T, proc export.Processor) {
ctx := context.Background()
accum := metricsdk.NewAccumulator(proc)
meter := sdkapi.WrapMeterImpl(accum)
counter, err := meter.SyncFloat64().Counter("counter.sum")
require.NoError(t, err)
counter.Add(ctx, 100, attribute.String("K1", "V1"))
counter.Add(ctx, 101, attribute.String("K1", "V2"))
counterObserver, err := meter.AsyncInt64().Counter("observer.sum")
require.NoError(t, err)
err = meter.RegisterCallback([]instrument.Asynchronous{counterObserver}, func(ctx context.Context) {
counterObserver.Observe(ctx, 10, attribute.String("K1", "V1"))
counterObserver.Observe(ctx, 11, attribute.String("K1", "V2"))
})
require.NoError(t, err)
accum.Collect(ctx)
}
func TestProcessorTesting(t *testing.T) {
// Test the Processor test helper using a real Accumulator to
// generate Accumulations.
checkpointer := processortest.NewCheckpointer(
processortest.NewProcessor(
processortest.AggregatorSelector(),
attribute.DefaultEncoder(),
),
)
generateTestData(t, checkpointer)
res := resource.NewSchemaless(attribute.String("R", "V"))
expect := map[string]float64{
"counter.sum/K1=V1/R=V": 100,
"counter.sum/K1=V2/R=V": 101,
"observer.sum/K1=V1/R=V": 10,
"observer.sum/K1=V2/R=V": 11,
}
// Export the data and validate it again.
exporter := processortest.New(
aggregation.StatelessTemporalitySelector(),
attribute.DefaultEncoder(),
)
err := exporter.Export(context.Background(), res, processortest.OneInstrumentationLibraryReader(
instrumentation.Scope{
Name: "test",
},
checkpointer.Reader(),
))
require.NoError(t, err)
require.EqualValues(t, expect, exporter.Values())
}