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// Copyright The OpenTelemetry Authors
// SPDX-License-Identifier: Apache-2.0
package autoprop
import (
"fmt"
"sync"
"testing"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
"go.opentelemetry.io/otel/propagation"
)
var noop = propagation.NewCompositeTextMapPropagator()
func TestRegistryEmptyStore(t *testing.T) {
r := registry{}
assert.NotPanics(t, func() {
require.NoError(t, r.store("first", noop))
})
}
func TestRegistryEmptyLoad(t *testing.T) {
r := registry{}
assert.NotPanics(t, func() {
v, ok := r.load("non-existent")
assert.False(t, ok, "empty registry should hold nothing")
assert.Nil(t, v, "non-nil propagator returned")
})
}
func TestRegistryConcurrentSafe(t *testing.T) {
const propName = "prop"
r := registry{}
assert.NotPanics(t, func() {
require.NoError(t, r.store(propName, noop))
})
var wg sync.WaitGroup
wg.Add(1)
go func() {
defer wg.Done()
assert.NotPanics(t, func() {
require.ErrorIs(t, r.store(propName, noop), errDupReg)
})
}()
wg.Add(1)
go func() {
defer wg.Done()
assert.NotPanics(t, func() {
v, ok := r.load(propName)
assert.True(t, ok, "missing propagator in registry")
assert.Equal(t, noop, v, "wrong propagator returned")
})
}()
wg.Wait()
}
func TestRegisterTextMapPropagator(t *testing.T) {
const propName = "custom"
RegisterTextMapPropagator(propName, noop)
t.Cleanup(func() { propagators.drop(propName) })
v, ok := propagators.load(propName)
assert.True(t, ok, "missing propagator in envRegistry")
assert.Equal(t, noop, v, "wrong propagator stored")
}
func TestDuplicateRegisterTextMapPropagatorPanics(t *testing.T) {
const propName = "custom"
RegisterTextMapPropagator(propName, noop)
t.Cleanup(func() { propagators.drop(propName) })
errString := fmt.Sprintf("%s: %q", errDupReg, propName)
assert.PanicsWithError(t, errString, func() {
RegisterTextMapPropagator(propName, noop)
})
}
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