rename ngin to rest

rest/handler/tracinghandler_test.go

@@ -0,0 +1,25 @@
+package handler
+
+import (
+	"net/http"
+	"net/http/httptest"
+	"testing"
+
+	"zero/core/trace/tracespec"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestTracingHandler(t *testing.T) {
+	req := httptest.NewRequest(http.MethodGet, "http://localhost", nil)
+	req.Header.Set("X-Trace-ID", "theid")
+	handler := TracingHandler(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		span, ok := r.Context().Value(tracespec.TracingKey).(tracespec.Trace)
+		assert.True(t, ok)
+		assert.Equal(t, "theid", span.TraceId())
+	}))
+
+	resp := httptest.NewRecorder()
+	handler.ServeHTTP(resp, req)
+	assert.Equal(t, http.StatusOK, resp.Code)
+}