from pathlib import Path

import pytest


def use(x):
    pass


def test_dynlib_loading(tmp_path, monkeypatch):
    # fmt: off
    # The data here was produced as follows:
    #
    # touch a.c
    # emcc -c a.c
    # emcc a.o -o a.so -sSIDE_MODULE
    # wasm-strip a.so -R target_features
    # xxd -i a.so
    #
    # I used emcc 4.0.9.
    Path(tmp_path / "a.so").write_bytes(
        bytes(
            [
                0x00, 0x61, 0x73, 0x6d, 0x01, 0x00, 0x00, 0x00, 0x00, 0x0f, 0x08, 0x64,
                0x79, 0x6c, 0x69, 0x6e, 0x6b, 0x2e, 0x30, 0x01, 0x04, 0x00, 0x00, 0x00,
                0x00, 0x01, 0x04, 0x01, 0x60, 0x00, 0x00, 0x02, 0x38, 0x03, 0x03, 0x65,
                0x6e, 0x76, 0x06, 0x6d, 0x65, 0x6d, 0x6f, 0x72, 0x79, 0x02, 0x00, 0x00,
                0x03, 0x65, 0x6e, 0x76, 0x0d, 0x5f, 0x5f, 0x6d, 0x65, 0x6d, 0x6f, 0x72,
                0x79, 0x5f, 0x62, 0x61, 0x73, 0x65, 0x03, 0x7f, 0x00, 0x03, 0x65, 0x6e,
                0x76, 0x0c, 0x5f, 0x5f, 0x74, 0x61, 0x62, 0x6c, 0x65, 0x5f, 0x62, 0x61,
                0x73, 0x65, 0x03, 0x7f, 0x00, 0x03, 0x02, 0x01, 0x00, 0x07, 0x15, 0x01,
                0x11, 0x5f, 0x5f, 0x77, 0x61, 0x73, 0x6d, 0x5f, 0x63, 0x61, 0x6c, 0x6c,
                0x5f, 0x63, 0x74, 0x6f, 0x72, 0x73, 0x00, 0x00, 0x0a, 0x04, 0x01, 0x02,
                0x00, 0x0b
            ]
        )
    )
    # fmt: on
    monkeypatch.syspath_prepend(tmp_path)
    with pytest.raises(
        ImportError, match="Can only load shared libraries from read only file systems"
    ):
        import a

        use(a)