import sys from unittest import mock import pytest import pre_commit.constants as C from pre_commit import parse_shebang from pre_commit.languages.node import get_default_version ACTUAL_GET_DEFAULT_VERSION = get_default_version.__wrapped__ @pytest.fixture def is_linux(): with mock.patch.object(sys, 'platform', 'linux'): yield @pytest.fixture def is_win32(): with mock.patch.object(sys, 'platform', 'win32'): yield @pytest.fixture def find_exe_mck(): with mock.patch.object(parse_shebang, 'find_executable') as mck: yield mck @pytest.mark.usefixtures('is_linux') def test_sets_system_when_node_and_npm_are_available(find_exe_mck): find_exe_mck.return_value = '/path/to/exe' assert ACTUAL_GET_DEFAULT_VERSION() == 'system' @pytest.mark.usefixtures('is_linux') def test_uses_default_when_node_and_npm_are_not_available(find_exe_mck): find_exe_mck.return_value = None assert ACTUAL_GET_DEFAULT_VERSION() == C.DEFAULT @pytest.mark.usefixtures('is_win32') def test_sets_default_on_windows(find_exe_mck): find_exe_mck.return_value = '/path/to/exe' assert ACTUAL_GET_DEFAULT_VERSION() == C.DEFAULT