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extract_test.go
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extract_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
//
// https://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 routingprocessor
import (
"context"
"testing"
"github.com/stretchr/testify/assert"
"go.uber.org/zap"
"google.golang.org/grpc/metadata"
)
func TestExtractorForTraces_FromContext(t *testing.T) {
testcases := []struct {
name string
ctxFunc func() context.Context
fromAttr string
expectedValue string
}{
{
name: "value from existing GRPC attribute",
ctxFunc: func() context.Context {
return metadata.NewIncomingContext(context.Background(),
metadata.Pairs("X-Tenant", "acme"),
)
},
fromAttr: "X-Tenant",
expectedValue: "acme",
},
{
name: "no values from empty context",
ctxFunc: context.Background,
fromAttr: "X-Tenant",
expectedValue: "",
},
{
name: "no values from existing GRPC attribute",
ctxFunc: func() context.Context {
return metadata.NewIncomingContext(context.Background(),
metadata.Pairs("X-Tenant", ""),
)
},
fromAttr: "X-Tenant",
expectedValue: "",
},
{
name: "multiple values from existing GRPC attribute returns the first one",
ctxFunc: func() context.Context {
return metadata.NewIncomingContext(context.Background(),
metadata.Pairs("X-Tenant", "globex", "X-Tenant", "acme"),
)
},
fromAttr: "X-Tenant",
expectedValue: "globex",
},
}
for _, tc := range testcases {
t.Run(tc.name, func(t *testing.T) {
e := newExtractor(tc.fromAttr, zap.NewNop())
assert.Equal(t,
tc.expectedValue,
e.extractFromContext(tc.ctxFunc()),
)
})
}
}