forked from open-telemetry/opentelemetry-go
/
config_test.go
131 lines (110 loc) · 3.78 KB
/
config_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 metric
import (
"context"
"fmt"
"testing"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
"go.opentelemetry.io/otel/sdk/metric/aggregation"
"go.opentelemetry.io/otel/sdk/metric/metricdata"
"go.opentelemetry.io/otel/sdk/metric/view"
"go.opentelemetry.io/otel/sdk/resource"
)
type reader struct {
producer producer
temporalityFunc TemporalitySelector
aggregationFunc AggregationSelector
collectFunc func(context.Context) (metricdata.ResourceMetrics, error)
forceFlushFunc func(context.Context) error
shutdownFunc func(context.Context) error
}
var _ Reader = (*reader)(nil)
func (r *reader) aggregation(kind view.InstrumentKind) aggregation.Aggregation { // nolint:revive // import-shadow for method scoped by type.
return r.aggregationFunc(kind)
}
func (r *reader) register(p producer) { r.producer = p }
func (r *reader) temporality(kind view.InstrumentKind) metricdata.Temporality {
return r.temporalityFunc(kind)
}
func (r *reader) Collect(ctx context.Context) (metricdata.ResourceMetrics, error) {
return r.collectFunc(ctx)
}
func (r *reader) ForceFlush(ctx context.Context) error { return r.forceFlushFunc(ctx) }
func (r *reader) Shutdown(ctx context.Context) error { return r.shutdownFunc(ctx) }
func TestConfigReaderSignalsEmpty(t *testing.T) {
f, s := config{}.readerSignals()
require.NotNil(t, f)
require.NotNil(t, s)
ctx := context.Background()
assert.Nil(t, f(ctx))
assert.Nil(t, s(ctx))
assert.ErrorIs(t, s(ctx), ErrReaderShutdown)
}
func TestConfigReaderSignalsForwarded(t *testing.T) {
var flush, sdown int
r := &reader{
forceFlushFunc: func(ctx context.Context) error {
flush++
return nil
},
shutdownFunc: func(ctx context.Context) error {
sdown++
return nil
},
}
c := newConfig([]Option{WithReader(r)})
f, s := c.readerSignals()
require.NotNil(t, f)
require.NotNil(t, s)
ctx := context.Background()
assert.NoError(t, f(ctx))
assert.NoError(t, f(ctx))
assert.NoError(t, s(ctx))
assert.ErrorIs(t, s(ctx), ErrReaderShutdown)
assert.Equal(t, 2, flush, "flush not called 2 times")
assert.Equal(t, 1, sdown, "shutdown not called 1 time")
}
func TestConfigReaderSignalsForwardedErrors(t *testing.T) {
r := &reader{
forceFlushFunc: func(ctx context.Context) error { return assert.AnError },
shutdownFunc: func(ctx context.Context) error { return assert.AnError },
}
c := newConfig([]Option{WithReader(r)})
f, s := c.readerSignals()
require.NotNil(t, f)
require.NotNil(t, s)
ctx := context.Background()
assert.ErrorIs(t, f(ctx), assert.AnError)
assert.ErrorIs(t, s(ctx), assert.AnError)
assert.ErrorIs(t, s(ctx), ErrReaderShutdown)
}
func TestUnifyMultiError(t *testing.T) {
f := func(context.Context) error { return assert.AnError }
funcs := []func(context.Context) error{f, f, f}
errs := []error{assert.AnError, assert.AnError, assert.AnError}
target := fmt.Errorf("%v", errs)
assert.Equal(t, unify(funcs)(context.Background()), target)
}
func TestWithResource(t *testing.T) {
res := resource.NewSchemaless()
c := newConfig([]Option{WithResource(res)})
assert.Same(t, res, c.res)
}
func TestWithReader(t *testing.T) {
r := &reader{}
c := newConfig([]Option{WithReader(r)})
assert.Contains(t, c.readers, r)
}