Added fake Bundle() interface to support ovs controller testing

Author: Ravi Sankar Penta

pkg/util/ovs/fake_ovs.go

@@ -4,6 +4,8 @@ import (
 	"fmt"
 	"sort"
 	"strings"
+
+	kerrs "k8s.io/apimachinery/pkg/util/errors"
 )
 
 // ovsFake implements a fake ovs.Interface for testing purposes
@@ -248,6 +250,52 @@ func (tx *ovsFakeTx) EndTransaction() error {
 	return err
 }
 
+func getFlowRule(bundleFlow string) (string, bool, error) {
+	var parts []string
+	isAdd := false
+	addPrefix := "flow add"
+	delPrefix := "flow delete"
+
+	if strings.Contains(bundleFlow, addPrefix) {
+		parts = strings.Split(bundleFlow, addPrefix)
+		isAdd = true
+	} else if strings.Contains(bundleFlow, delPrefix) {
+		parts = strings.Split(bundleFlow, delPrefix)
+	} else {
+		return "", isAdd, fmt.Errorf("invalid bundle flow %q", bundleFlow)
+	}
+
+	if len(parts) != 2 {
+		return "", isAdd, fmt.Errorf("invalid bundle flow %q", bundleFlow)
+	}
+	return strings.TrimLeft(parts[1], " "), isAdd, nil
+}
+
+func (fake *ovsFake) Bundle(bundleFlows []string) error {
+	errs := []error{}
+	tx := fake.NewTransaction()
+
+	for _, bflow := range bundleFlows {
+		flow, isAdd, err := getFlowRule(bflow)
+		if err != nil {
+			errs = append(errs, err)
+			continue
+		}
+
+		if isAdd {
+			tx.AddFlow(flow)
+		} else {
+			tx.DeleteFlows(flow)
+		}
+	}
+
+	if err := tx.EndTransaction(); err != nil {
+		errs = append(errs, err)
+	}
+
+	return kerrs.NewAggregate(errs)
+}
+
 func (fake *ovsFake) DumpFlows(flow string, args ...interface{}) ([]string, error) {
 	if err := fake.ensureExists(); err != nil {
 		return nil, err