1 files changed, 18 insertions, 0 deletions
diff --git a/src/runtime/export_test.go b/src/runtime/export_test.go
index 83b7f86ef8..0ac15ce82c 100644
--- a/src/runtime/export_test.go
+++ b/src/runtime/export_test.go
@@ -1332,3 +1332,21 @@ func Releasem() {
 }
 
 var Timediv = timediv
+
+type PIController struct {
+	piController
+}
+
+func NewPIController(kp, ti, tt, min, max float64) *PIController {
+	return &PIController{piController{
+		kp:  kp,
+		ti:  ti,
+		tt:  tt,
+		min: min,
+		max: max,
+	}}
+}
+
+func (c *PIController) Next(input, setpoint, period float64) (float64, bool) {
+	return c.piController.next(input, setpoint, period)
+}