import { expect, test } from "vitest"

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

test("sum adds all numbers in the array", () => {
  expect(sum([1, 2, 3])).toBe(6)
  expect(sum([-1, 0, 1])).toBe(0)
  expect(sum([])).toBe(0)
})

test("sum throws when the array contains non-number values", () => {
  expect(() => sum([1, "2" as unknown as number, 3])).toThrow(
    "All elements in the array must be numbers.",
  )
  expect(() => sum([undefined as unknown as number])).toThrow(
    "All elements in the array must be numbers.",
  )
})