[#293] pkg/container: Implement and use generators of the messages

Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>

pkg/container/test/generate.go

@@ -0,0 +1,48 @@
+package containertest
+
+import (
+	"github.com/nspcc-dev/neofs-api-go/pkg/container"
+	cidtest "github.com/nspcc-dev/neofs-api-go/pkg/container/id/test"
+	netmaptest "github.com/nspcc-dev/neofs-api-go/pkg/netmap/test"
+	ownertest "github.com/nspcc-dev/neofs-api-go/pkg/owner/test"
+	refstest "github.com/nspcc-dev/neofs-api-go/pkg/test"
+)
+
+// Attribute returns random container.Attribute.
+func Attribute() *container.Attribute {
+	x := container.NewAttribute()
+
+	x.SetKey("key")
+	x.SetValue("value")
+
+	return x
+}
+
+// Attributes returns random container.Attributes.
+func Attributes() container.Attributes {
+	return container.Attributes{Attribute(), Attribute()}
+}
+
+// Container returns random container.Container.
+func Container() *container.Container {
+	x := container.New()
+
+	x.SetVersion(refstest.Version())
+	x.SetAttributes(Attributes())
+	x.SetOwnerID(ownertest.Generate())
+	x.SetBasicACL(123)
+	x.SetPlacementPolicy(netmaptest.PlacementPolicy())
+
+	return x
+}
+
+// UsedSpaceAnnouncement returns random container.UsedSpaceAnnouncement.
+func UsedSpaceAnnouncement() *container.UsedSpaceAnnouncement {
+	x := container.NewAnnouncement()
+
+	x.SetContainerID(cidtest.Generate())
+	x.SetEpoch(55)
+	x.SetUsedSpace(999)
+
+	return x
+}