chore: add more tests (#2409)

gateway/internal/eventhandler_test.go

@@ -0,0 +1,20 @@
+package internal
+
+import (
+	"io"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"google.golang.org/grpc/codes"
+	"google.golang.org/grpc/status"
+)
+
+func TestEventHandler(t *testing.T) {
+	h := NewEventHandler(io.Discard, nil)
+	h.OnResolveMethod(nil)
+	h.OnSendHeaders(nil)
+	h.OnReceiveHeaders(nil)
+	h.OnReceiveTrailers(status.New(codes.OK, ""), nil)
+	assert.Equal(t, codes.OK, h.Status.Code())
+	h.OnReceiveResponse(nil)
+}