import { expect, test } from "vitest"

import { add } from "#Source/calc/add.ts"

test("add returns the sum of two numbers", () => {
  expect(add(1, 2)).toBe(3)
  expect(add(-5, 2.5)).toBe(-2.5)
})

test("add throws when either argument is not a number", () => {
  expect(() => add("1" as unknown as number, 2)).toThrow("Both arguments must be numbers")
  expect(() => add(1, null as unknown as number)).toThrow("Both arguments must be numbers")
})