[#54] tests: unify test generator names

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

subnet/id/id_test.go

@@ -70,7 +70,7 @@ func TestID_Equals(t *testing.T) {
 }
 
 func TestSubnetIDEncoding(t *testing.T) {
-	id := subnetidtest.GenerateID()
+	id := subnetidtest.ID()
 
 	t.Run("binary", func(t *testing.T) {
 		data, err := id.Marshal()

subnet/id/test/id.go

@@ -6,8 +6,8 @@ import (
 	subnetid "github.com/nspcc-dev/neofs-sdk-go/subnet/id"
 )
 
-// GenerateID generates and returns random subnetid.ID using math/rand.Uint32.
-func GenerateID() *subnetid.ID {
+// ID generates and returns random subnetid.ID using math/rand.Uint32.
+func ID() *subnetid.ID {
 	var id subnetid.ID
 
 	id.SetNumber(rand.Uint32())

subnet/subnet_test.go

@@ -40,7 +40,7 @@ func TestInfo_SetOwner(t *testing.T) {
 		info Info
 	)
 
-	id = *ownertest.GenerateID()
+	id = *ownertest.ID()
 
 	require.False(t, IsOwner(info, id))