add test | revert unwanted typo fix

CHANGELOG.md

@@ -17,7 +17,7 @@ This project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.htm
 - Store and provide the emitted `context.Context` in `ScopeRecords` of `go.opentelemetry.io/otel/sdk/log/logtest`. (#5468)
 - `SimpleProcessor.OnEmit` in `go.opentelemetry.io/otel/sdk/log` no longer allocates a slice which makes it possible to have a zero-allocation log processing using `SimpleProcessor`. (#5493)
 - The `AssertRecordEqual` method to `go.opentelemetry.io/otel/log/logtest` to allow comparison of two log records in tests. (#5499)
-- The `WithHeaders` option to `go.opentelemetry.io/otel/exporters/zipkin` to allow configuring custom http headers while exporting spans. (#3474)
+- The `WithHeaders` option to `go.opentelemetry.io/otel/exporters/zipkin` to allow configuring custom http headers while exporting spans. (#5530)
 
 ### Changed
 
@@ -41,7 +41,7 @@ This project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.htm
 - Prevent random number generation data-race for experimental rand exemplars in `go.opentelemetry.io/otel/sdk/metric`. (#5456)
 - Fix counting number of dropped attributes of `Record` in `go.opentelemetry.io/otel/sdk/log`. (#5464)
 - Fix panic in baggage creation when a member contains 0x80 char in key or value. (#5494)
-- Correct comments for the priority of the `WithEndpoint` and `WithEndpointURL` options and their corresponding environment variables in `go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc`. (#5508)
+- Correct comments for the priority of the `WithEndpoint` and `WithEndpointURL` options and their coresponding environment variables in  in `go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc`. (#5508)
 - Fix stale timestamps reported by the lastvalue aggregation. (#5517)
 
 ## [1.27.0/0.49.0/0.3.0] 2024-05-21

exporters/zipkin/zipkin_test.go

@@ -12,6 +12,7 @@ import (
 	"log"
 	"net"
 	"net/http"
+	"net/http/httptest"
 	"sync"
 	"testing"
 	"time"
@@ -324,6 +325,28 @@ func TestExportSpans(t *testing.T) {
 	}
 	require.Eventually(t, checkFunc, time.Second, 10*time.Millisecond)
 	require.Equal(t, models, collector.StealModels())
+
+	got := make(chan *http.Request, 1)
+	handler := func(w http.ResponseWriter, r *http.Request) {
+		got <- r
+		w.WriteHeader(http.StatusOK)
+	}
+
+	srv := httptest.NewServer(http.HandlerFunc(handler))
+	defer srv.Close()
+
+	headers := map[string]string{"name1": "value1", "name2": "value2"}
+	e := &Exporter{
+		url:     srv.URL,
+		client:  srv.Client(),
+		headers: headers,
+	}
+
+	_ = e.ExportSpans(context.Background(), spans)
+	req := <-got
+
+	assert.Equal(t, headers["name1"], req.Header.Get("name1"))
+	assert.Equal(t, headers["name2"], req.Header.Get("name2"))
 }
 
 func TestExporterShutdownHonorsTimeout(t *testing.T) {