Merge pull request #109 from tri-adam/default-group-const

Add Constant for Default Group

pkg/sif/descriptor_input.go

@@ -202,23 +202,27 @@ type DescriptorInput struct {
 	opts descriptorOpts
 }
 
+// DefaultObjectGroup is the default group that data objects are placed in.
+const DefaultObjectGroup = 1
+
 // NewDescriptorInput returns a DescriptorInput representing a data object of type t, with contents
 // read from r, configured according to opts.
 //
 // It is possible (and often necessary) to store additional metadata related to certain types of
 // data objects. Consider supplying options such as OptCryptoMessageMetadata, OptPartitionMetadata,
 // and OptSignatureMetadata for this purpose.
 //
-// By default, the data object will be placed in data object group 1. To override this behavior,
-// use OptNoGroup or OptGroupID. To link this data object, use OptLinkedID or OptLinkedGroupID.
+// By default, the data object will be placed in the default data object group (1). To override
+// this behavior, use OptNoGroup or OptGroupID. To link this data object, use OptLinkedID or
+// OptLinkedGroupID.
 //
 // By default, the data object will be aligned according to the system's memory page size. To
 // override this behavior, consider using OptObjectAlignment.
 //
 // By default, no name is set for data object. To set a name, use OptObjectName.
 func NewDescriptorInput(t DataType, r io.Reader, opts ...DescriptorInputOpt) (DescriptorInput, error) {
 	dopts := descriptorOpts{
-		groupID:   1,
+		groupID:   DefaultObjectGroup,
 		alignment: os.Getpagesize(),
 		t:         time.Now(),
 	}

pkg/sif/descriptor_test.go

@@ -89,7 +89,7 @@ func TestDescriptor_GetName(t *testing.T) {
 
 	parts, err := f.GetDescriptors(
 		WithDataType(DataPartition),
-		WithGroupID(1),
+		WithGroupID(DefaultObjectGroup),
 	)
 	if err != nil {
 		t.Fatalf("failed to get descriptors: %v", err)