Add customer field to order model (bold-commerce#15)

order.go

@@ -51,6 +51,7 @@ type Order struct {
 	UpdatedAt             *time.Time       `json:"updated_at"`
 	ClosedAt              *time.Time       `json:"closed_at"`
 	ProcessedAt           *time.Time       `json:"processed_at"`
+	Customer              *Customer        `json:"customer"`
 	BillingAddress        *Address         `json:"billing_address"`
 	ShippingAddress       *Address         `json:"shipping_address"`
 	Currency              string           `json:"currency"`

order_test.go

@@ -30,6 +30,14 @@ func orderTests(t *testing.T, order Order) {
 	if order.TotalTax != nil {
 		t.Errorf("Order.TotalTax returned %+v, expected %+v", order.TotalTax, nil)
 	}
+
+	// Check customer
+	if order.Customer == nil {
+		t.Error("Expected Customer to not be nil")
+	}
+	if order.Customer.Email != "[email protected]" {
+		t.Errorf("Customer.Email, expected %v, actual %v", "[email protected]", order.Customer.Email)
+	}
 }
 
 func TestOrderList(t *testing.T) {