import { describe, expect, test } from "vitest";
import { ConstString, parse, serialize, sizeofHead } from "../src";
import { expectDataViewEqual } from ".";
import { filledDataView, sizedDataView } from '../src'

describe(ConstString.name, () => {
  test('serialize', () => {
    const expected = filledDataView([0x68, 0x65, 0x6C, 0x00, 0x00])
    let dv = sizedDataView(4)
    expect(() => serialize(dv, 'hello', ConstString(5))).toThrow()

    dv = sizedDataView(5)

    expect(() => serialize(dv, 'hello', ConstString(3))).toThrow()
    serialize(dv, 'hel', ConstString(3))
    expectDataViewEqual(dv, expected)
  })

  test('parse', () => {
    const expected = 'hel'
    const dv = filledDataView([0x68, 0x65, 0x6C, 0x6C, 0x6F])
    const actual = parse(dv, ConstString(3))
    expectDataViewEqual(actual, expected)
  })

  test('sizeof', () => {
    expect(sizeofHead(ConstString(2))).toEqual(2)
  })
})