add encoding main, ext tests

def/error.go

@@ -14,4 +14,5 @@ var (
 	ErrTooShortBytes         = errors.New("too short bytes")
 	ErrLackDataLengthToSlice = errors.New("data length lacks to create slice")
 	ErrLackDataLengthToMap   = errors.New("data length lacks to create map")
+	ErrUnsupported           = errors.New("unsupported")
 )

internal/decoding/decoding.go

@@ -333,7 +333,7 @@ func (d *decoder) decode(rv reflect.Value, offset int) (int, error) {
 		}
 
 	default:
-		return 0, fmt.Errorf("type(%v) is unsupported", rv.Kind())
+		return 0, fmt.Errorf("%v is %w type", rv.Kind(), def.ErrUnsupported)
 	}
 	return offset, nil
 }

internal/encoding/encoding.go

@@ -262,7 +262,7 @@ func (e *encoder) calcSize(rv reflect.Value) (int, error) {
 		// do nothing (return nil)
 
 	default:
-		return 0, fmt.Errorf("type(%v) is unsupported", rv.Kind())
+		return 0, fmt.Errorf("%v is %w type", rv.Kind(), def.ErrUnsupported)
 	}
 
 	return ret, nil

internal/stream/decoding/decoding.go

@@ -314,7 +314,7 @@ func (d *decoder) decodeWithCode(code byte, rv reflect.Value) error {
 		}
 
 	default:
-		return fmt.Errorf("type(%v) is unsupported", rv.Kind())
+		return fmt.Errorf("%v is %w type", rv.Kind(), def.ErrUnsupported)
 	}
 	return nil
 }

internal/stream/encoding/encoding.go

@@ -5,6 +5,7 @@ import (
 	"io"
 	"reflect"
 
+	"github.com/shamaton/msgpack/v2/def"
 	"github.com/shamaton/msgpack/v2/internal/common"
 )
 
@@ -188,7 +189,7 @@ func (e *encoder) create(rv reflect.Value) error {
 	case reflect.Invalid:
 		return e.writeNil()
 	default:
-		return fmt.Errorf("type(%v) is unsupported", rv.Kind())
+		return fmt.Errorf("%v is %w type", rv.Kind(), def.ErrUnsupported)
 	}
 	return nil
 }