import io

import pytest

from pywasm import binary
from pywasm import Runtime

from .helpers import wat2wasm

@pytest.mark.parametrize('size,offset,output', [
    ('32', 0,         0x3020100),
    ('32', 1,         0x4030201),
    ('64', 0, 0x706050403020100),
    ('64', 2, 0x908070605040302),
])
def test_i32_64_load(size, offset, output):
    code_wat = f"""
  (module
    (memory 1)
     (data (memory 0) (i32.const 0) "\\00\\01\\02\\03\\04\\05\\06\\07\\08\\09\\10")

    (func (export "testEntry") (result i{size})
      i32.const {offset}
      i{size}.load
      return ))
"""
    code_wasm = wat2wasm(code_wat)
    module = binary.Module.from_reader(io.BytesIO(code_wasm))

    runtime = Runtime(module, {}, {})

    out_put = runtime.exec('testEntry', [])
    assert output == out_put