the type construct of components display. TODO: add area rug calculator.

lib/__tests__/product-test.ts

@@ -1,4 +1,3 @@
-import { length } from "enheter";
 import { Product } from "../product";
 
 describe("Product tests", () => {
@@ -20,11 +19,4 @@ describe("Product tests", () => {
     const comparison = standard.priceFor({l : 24, u: "inch"});
     expect(comparison).toBeCloseTo(20, 4);
   });
-
-  it("Can convert to/from object", () => {
-    const standard = new Product(10, {l: 1, u : "feet"});
-    const obj = standard.asObject;
-    const back = Product.fromObject(obj);
-    expect(back).toEqual(standard);
-  })
 });

lib/dimensions.ts

@@ -11,7 +11,6 @@ export type area_t = length_t & {
 
 export type dimensions_t = area_t | length_t;
 
-export type product_type_t = "area" | "length";
 
 export const isArea = (d: dimensions_t) => ("width" in d);
 export const isLength = (d: dimensions_t) => (!("width" in d));

lib/product.ts

@@ -1,6 +1,7 @@
 import uuid from "react-native-uuid";
 import { dimensions_t, area_t } from "./dimensions";
 import { matchDimensions } from "./dimensions";
+import { Area, Length, Unit } from "convert";
 
 export type Id = string;
 
@@ -15,11 +16,18 @@ export type ProductAttributes = {
     currency?: Currency,
     [index:string]: any,
 }
+
 export function dimensionArea(d: dimensions_t) {
     return "w" in d ? d.w * d.l : 0;
 }
 
-export type product_type_t = "lumber" | "area_rug"
+export const PRODUCT_TYPES = [
+    "lumber",
+    "area_rug",
+] as const;
+
+export type product_type_t = typeof PRODUCT_TYPES[number];
+
 
 export type Product = {
     id?: Id;