Fix test and avoid change to array signatures

typed_array.go.erb was not updated back in
a8802b16cc when Value, EncodeBinary,
EncodeText, and MarshalJSON were changed to be defined on T instead of
*T. This has been corrected.

int4_array.go

@@ -61,6 +61,25 @@ func (dst *Int4Array) Set(src interface{}) error {
 			}
 		}
 
+	case []int:
+		if value == nil {
+			*dst = Int4Array{Status: Null}
+		} else if len(value) == 0 {
+			*dst = Int4Array{Status: Present}
+		} else {
+			elements := make([]Int4, len(value))
+			for i := range value {
+				if err := elements[i].Set(value[i]); err != nil {
+					return err
+				}
+			}
+			*dst = Int4Array{
+				Elements:   elements,
+				Dimensions: []ArrayDimension{{Length: int32(len(elements)), LowerBound: 1}},
+				Status:     Present,
+			}
+		}
+
 	case []Int4:
 		if value == nil {
 			*dst = Int4Array{Status: Null}
@@ -117,6 +136,15 @@ func (src *Int4Array) AssignTo(dst interface{}) error {
 			}
 			return nil
 
+		case *[]int:
+			*v = make([]int, len(src.Elements))
+			for i := range src.Elements {
+				if err := src.Elements[i].AssignTo(&((*v)[i])); err != nil {
+					return err
+				}
+			}
+			return nil
+
 		default:
 			if nextDst, retry := GetAssignToDstType(dst); retry {
 				return src.AssignTo(nextDst)
@@ -208,7 +236,7 @@ func (dst *Int4Array) DecodeBinary(ci *ConnInfo, src []byte) error {
 	return nil
 }
 
-func (src *Int4Array) EncodeText(ci *ConnInfo, buf []byte) ([]byte, error) {
+func (src Int4Array) EncodeText(ci *ConnInfo, buf []byte) ([]byte, error) {
 	switch src.Status {
 	case Null:
 		return nil, nil
@@ -265,7 +293,7 @@ func (src *Int4Array) EncodeText(ci *ConnInfo, buf []byte) ([]byte, error) {
 	return buf, nil
 }
 
-func (src *Int4Array) EncodeBinary(ci *ConnInfo, buf []byte) ([]byte, error) {
+func (src Int4Array) EncodeBinary(ci *ConnInfo, buf []byte) ([]byte, error) {
 	switch src.Status {
 	case Null:
 		return nil, nil
@@ -328,7 +356,7 @@ func (dst *Int4Array) Scan(src interface{}) error {
 }
 
 // Value implements the database/sql/driver Valuer interface.
-func (src *Int4Array) Value() (driver.Value, error) {
+func (src Int4Array) Value() (driver.Value, error) {
 	buf, err := src.EncodeText(nil, nil)
 	if err != nil {
 		return nil, err