Merge pull request #2 from steviebps/unmarshall-error-messaging

Unmarshal error handling messages for toggle

cmd/root.go

@@ -63,7 +63,7 @@ var rootCmd = &cobra.Command{
 		}
 
 		if err := json.Unmarshal(byteValue, &globalChamber); err != nil {
-			fmt.Printf("Error reading JSON: %s\n", err)
+			fmt.Printf("Error unmarshaling %s: %s\n", chamberFile, err)
 			os.Exit(1)
 		}
 	},

pkg/toggle.go

@@ -3,6 +3,7 @@ package rein
 import (
 	"encoding/json"
 	"errors"
+	"fmt"
 	"reflect"
 )
 
@@ -12,6 +13,7 @@ type Toggle struct {
 	Value      interface{} `json:"value"`
 }
 
+// UnmarshalJSON Custom UnmarshalJSON method for validating toggle Value to the ToggleType
 func (t *Toggle) UnmarshalJSON(b []byte) error {
 	var alias toggleAlias
 	err := json.Unmarshal(b, &alias)
@@ -20,7 +22,8 @@ func (t *Toggle) UnmarshalJSON(b []byte) error {
 	}
 
 	if !isValidType(alias.Value, alias.ToggleType) {
-		return errors.New("Toggle is not the right type")
+		errMsg := fmt.Sprintf("%v (%T) not of the type %s from the toggle: %s", alias.Value, alias.Value, alias.ToggleType, alias.Name)
+		return errors.New(errMsg)
 	}
 
 	*t = alias.toToggle()