io.EOF should be an expected result of Write

transport/transport_test.go

@@ -732,7 +732,7 @@ func TestEncodingRequiredStatus(t *testing.T) {
 		Last:  true,
 		Delay: false,
 	}
-	if err := ct.Write(s, expectedRequest, &opts); err != nil {
+	if err := ct.Write(s, expectedRequest, &opts); err != nil || err == io.EOF {
 		t.Fatalf("Failed to write the request: %v", err)
 	}
 	p := make([]byte, http2MaxFrameLen)