TUN-5989: Add in-memory otlp exporter

tracing/tracing_test.go

@@ -0,0 +1,50 @@
+package tracing
+
+import (
+	"net/http"
+	"net/http/httptest"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	tracesdk "go.opentelemetry.io/otel/sdk/trace"
+	"go.opentelemetry.io/otel/trace"
+)
+
+func TestNewCfTracer(t *testing.T) {
+	req := httptest.NewRequest("GET", "http://localhost", nil)
+	req.Header.Add(tracerContextName, "14cb070dde8e51fc5ae8514e69ba42ca:b38f1bf5eae406f3:0:1")
+	tr := NewTracedRequest(req)
+	assert.NotNil(t, tr)
+	assert.IsType(t, tracesdk.NewTracerProvider(), tr.TracerProvider)
+	assert.IsType(t, &InMemoryOtlpClient{}, tr.exporter)
+}
+
+func TestNewCfTracerMultiple(t *testing.T) {
+	req := httptest.NewRequest("GET", "http://localhost", nil)
+	req.Header.Add(tracerContextName, "1241ce3ecdefc68854e8514e69ba42ca:b38f1bf5eae406f3:0:1")
+	req.Header.Add(tracerContextName, "14cb070dde8e51fc5ae8514e69ba42ca:b38f1bf5eae406f3:0:1")
+	tr := NewTracedRequest(req)
+	assert.NotNil(t, tr)
+	assert.IsType(t, tracesdk.NewTracerProvider(), tr.TracerProvider)
+	assert.IsType(t, &InMemoryOtlpClient{}, tr.exporter)
+}
+
+func TestNewCfTracerNilHeader(t *testing.T) {
+	req := httptest.NewRequest("GET", "http://localhost", nil)
+	req.Header[http.CanonicalHeaderKey(tracerContextName)] = nil
+	tr := NewTracedRequest(req)
+	assert.NotNil(t, tr)
+	assert.IsType(t, trace.NewNoopTracerProvider(), tr.TracerProvider)
+	assert.IsType(t, &NoopOtlpClient{}, tr.exporter)
+}
+
+func TestNewCfTracerInvalidHeaders(t *testing.T) {
+	req := httptest.NewRequest("GET", "http://localhost", nil)
+	for _, test := range [][]string{nil, {""}} {
+		req.Header[http.CanonicalHeaderKey(tracerContextName)] = test
+		tr := NewTracedRequest(req)
+		assert.NotNil(t, tr)
+		assert.IsType(t, trace.NewNoopTracerProvider(), tr.TracerProvider)
+		assert.IsType(t, &NoopOtlpClient{}, tr.exporter)
+	}
+}