[#137] sdk: Implement netmap filtering and selection

Signed-off-by: Evgenii Stratonikov <evgeniy@nspcc.ru>

pkg/netmap/helper_test.go

@@ -0,0 +1,61 @@
+package netmap
+
+import (
+	"github.com/nspcc-dev/neofs-api-go/v2/netmap"
+)
+
+func newFilter(name string, k, v string, op netmap.Operation, fs ...*netmap.Filter) *netmap.Filter {
+	f := new(netmap.Filter)
+	f.SetName(name)
+	f.SetKey(k)
+	f.SetOp(op)
+	f.SetValue(v)
+	f.SetFilters(fs)
+	return f
+}
+
+func newSelector(name string, attr string, c netmap.Clause, count uint32, filter string) *netmap.Selector {
+	s := new(netmap.Selector)
+	s.SetName(name)
+	s.SetAttribute(attr)
+	s.SetCount(count)
+	s.SetClause(c)
+	s.SetFilter(filter)
+	return s
+}
+
+func newPlacementPolicy(bf uint32, rs []*netmap.Replica, ss []*netmap.Selector, fs []*netmap.Filter) *netmap.PlacementPolicy {
+	p := new(netmap.PlacementPolicy)
+	p.SetContainerBackupFactor(bf)
+	p.SetReplicas(rs)
+	p.SetSelectors(ss)
+	p.SetFilters(fs)
+	return p
+}
+
+func newReplica(c uint32, s string) *netmap.Replica {
+	r := new(netmap.Replica)
+	r.SetCount(c)
+	r.SetSelector(s)
+	return r
+}
+
+func nodeInfoFromAttributes(props ...string) netmap.NodeInfo {
+	attrs := make([]*netmap.Attribute, len(props)/2)
+	for i := range attrs {
+		attrs[i] = new(netmap.Attribute)
+		attrs[i].SetKey(props[i*2])
+		attrs[i].SetValue(props[i*2+1])
+	}
+	var n netmap.NodeInfo
+	n.SetAttributes(attrs)
+	return n
+}
+
+func getTestNode(props ...string) *Node {
+	m := make(map[string]string, len(props)/2)
+	for i := 0; i < len(props); i += 2 {
+		m[props[i]] = props[i+1]
+	}
+	return &Node{AttrMap: m}
+}