import {Suite, expect} from "cynic"
import {formatCurrency} from "./format-currency.js"

const locale = "en-us"

export default <Suite>{
	"displays human-readable currency": async() => {
		expect(formatCurrency({
			value: 1.23,
			code: "CAD",
			locale,
		}).price).equals("$1.23 CAD")
		expect(formatCurrency({
			value: 1234.56,
			code: "CAD",
			locale,
		}).price).equals("$1,234.56 CAD")
		expect(formatCurrency({
			value: 1234.56,
			code: "GBP",
			locale,
		}).price).equals("£1,234.56 GBP")
	},
	"rounds numbers": async() => {
		expect(formatCurrency({
			value: 1.234,
			code: "CAD",
			locale,
		}).price).equals("$1.23 CAD")
		expect(formatCurrency({
			value: 1.235,
			code: "CAD",
			locale,
		}).price).equals("$1.24 CAD")
		expect(formatCurrency({
			value: 1234567.89,
			code: "CAD",
			precision: 0,
			locale,
		}).price).equals("$1,234,568 CAD")
	},
	"respects precision": async() => {
		expect(formatCurrency({
			value: 123,
			code: "CAD",
			precision: 0,
		}).price).equals("$123 CAD")
		expect(formatCurrency({
			value: 123,
			code: "CAD",
			precision: 1,
		}).price).equals("$123.0 CAD")
	},
	"throws on unknown currency": async() => {
		expect(() => formatCurrency({
			value: 123,
			code: "xyz",
			locale,
		})).throws()
	},
}