defmodule WriteTest do
  use ExUnit.Case
  doctest Amethyst.Minecraft.Write
  doctest Amethyst.Minecraft.Read

  test "writing a varint" do
    assert Amethyst.Minecraft.Write.varint(0) == <<0x00>>
    assert Amethyst.Minecraft.Write.varint(127) == <<0x7F>>
    assert Amethyst.Minecraft.Write.varint(128) == <<0x80, 0x01>>
    assert Amethyst.Minecraft.Write.varint(255) == <<0xFF, 0x01>>
    assert Amethyst.Minecraft.Write.varint(2_147_483_647) == <<0xFF, 0xFF, 0xFF, 0xFF, 0x07>>
    assert Amethyst.Minecraft.Write.varint(-1) == <<0xFF, 0xFF, 0xFF, 0xFF, 0x0F>>
    assert Amethyst.Minecraft.Write.varint(-2_147_483_648) == <<0x80, 0x80, 0x80, 0x80, 0x08>>
  end

  test "writing a varlong" do
    assert Amethyst.Minecraft.Write.varlong(0) == <<0x00>>
    assert Amethyst.Minecraft.Write.varlong(127) == <<0x7F>>
    assert Amethyst.Minecraft.Write.varlong(128) == <<0x80, 0x01>>
    assert Amethyst.Minecraft.Write.varlong(255) == <<0xFF, 0x01>>
    assert Amethyst.Minecraft.Write.varlong(2_147_483_647) == <<0xFF, 0xFF, 0xFF, 0xFF, 0x07>>
    assert Amethyst.Minecraft.Write.varlong(9_223_372_036_854_775_807) == <<0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x7F>>
    assert Amethyst.Minecraft.Write.varlong(-1) == <<0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x01>>
  end

  test "writing a string" do
    assert Amethyst.Minecraft.Write.string("Hello, world!") == <<0x0D, "Hello, world!">>
    assert Amethyst.Minecraft.Write.string("") == <<0x00>>
  end
end