mirror of
https://github.com/open-telemetry/opentelemetry-go.git
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8fd4b26655
* Add oteltest text map propagator and carrier * Add changes to CHANGELOG * Add PR number to CHANGELOG * Add test for empty newState Gotta farm that codecov
125 lines
3.5 KiB
Go
125 lines
3.5 KiB
Go
// Copyright The OpenTelemetry Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package oteltest
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import (
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"context"
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"testing"
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)
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var (
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key, value = "test", "true"
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)
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func TestTextMapCarrierGet(t *testing.T) {
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tmc := NewTextMapCarrier(map[string]string{key: value})
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tmc.GotN(t, 0)
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if got := tmc.Get("empty"); got != "" {
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t.Errorf("TextMapCarrier.Get returned %q for an empty key", got)
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}
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tmc.GotKey(t, "empty")
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tmc.GotN(t, 1)
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if got := tmc.Get(key); got != value {
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t.Errorf("TextMapCarrier.Get(%q) returned %q, want %q", key, got, value)
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}
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tmc.GotKey(t, key)
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tmc.GotN(t, 2)
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}
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func TestTextMapCarrierSet(t *testing.T) {
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tmc := NewTextMapCarrier(nil)
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tmc.SetN(t, 0)
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tmc.Set(key, value)
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if got, ok := tmc.data[key]; !ok {
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t.Errorf("TextMapCarrier.Set(%q,%q) failed to store pair", key, value)
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} else if got != value {
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t.Errorf("TextMapCarrier.Set(%q,%q) stored (%q,%q), not (%q,%q)", key, value, key, got, key, value)
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}
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tmc.SetKeyValue(t, key, value)
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tmc.SetN(t, 1)
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}
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func TestTextMapCarrierReset(t *testing.T) {
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tmc := NewTextMapCarrier(map[string]string{key: value})
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tmc.GotN(t, 0)
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tmc.SetN(t, 0)
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tmc.Reset()
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tmc.GotN(t, 0)
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tmc.SetN(t, 0)
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if got := tmc.Get(key); got != "" {
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t.Error("TextMapCarrier.Reset() failed to clear initial data")
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}
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tmc.GotN(t, 1)
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tmc.GotKey(t, key)
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tmc.Set(key, value)
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tmc.SetKeyValue(t, key, value)
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tmc.SetN(t, 1)
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tmc.Reset()
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tmc.GotN(t, 0)
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tmc.SetN(t, 0)
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if got := tmc.Get(key); got != "" {
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t.Error("TextMapCarrier.Reset() failed to clear data")
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}
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}
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func TestTextMapPropagatorInjectExtract(t *testing.T) {
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name := "testing"
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ctx := context.Background()
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carrier := NewTextMapCarrier(map[string]string{name: value})
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propagator := NewTextMapPropagator(name)
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propagator.Inject(ctx, carrier)
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// Carrier value overridden with state.
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if carrier.SetKeyValue(t, name, "1,0") {
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// Ensure nothing has been extracted yet.
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propagator.ExtractedN(t, ctx, 0)
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// Test the injection was counted.
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propagator.InjectedN(t, carrier, 1)
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}
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ctx = propagator.Extract(ctx, carrier)
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v := ctx.Value(ctxKeyType(name))
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if v == nil {
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t.Error("TextMapPropagator.Extract failed to extract state")
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}
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if s, ok := v.(state); !ok {
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t.Error("TextMapPropagator.Extract did not extract proper state")
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} else if s.Extractions != 1 {
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t.Error("TextMapPropagator.Extract did not increment state.Extractions")
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}
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if carrier.GotKey(t, name) {
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// Test the extraction was counted.
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propagator.ExtractedN(t, ctx, 1)
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// Ensure no additional injection was recorded.
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propagator.InjectedN(t, carrier, 1)
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}
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}
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func TestTextMapPropagatorFields(t *testing.T) {
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name := "testing"
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propagator := NewTextMapPropagator(name)
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if got := propagator.Fields(); len(got) != 1 {
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t.Errorf("TextMapPropagator.Fields returned %d fields, want 1", len(got))
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} else if got[0] != name {
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t.Errorf("TextMapPropagator.Fields returned %q, want %q", got[0], name)
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}
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}
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func TestNewStateEmpty(t *testing.T) {
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if want, got := (state{}), newState(""); got != want {
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t.Errorf("newState(\"\") returned %v, want %v", got, want)
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}
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}
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