Source code for tests.parsers.utils

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# Copyright 2019-2021 Stephen McDowell                                                 #
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# Licensed under the Apache License, Version 2.0 (the "License");                      #
# you may not use this file except in compliance with the License.                     #
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#     http://www.apache.org/licenses/LICENSE-2.0                                       #
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"""Tests for the :mod:`ci_exec.parsers.utils` module."""

import platform

from ci_exec.parsers.utils import env_or_platform_default
from ci_exec.utils import set_env, unset_env


@unset_env("CC")
def test_env_or_platform_default():
    """
    Validate |env_or_platform_default| returns expected values for each platform.

    .. |env_or_platform_default| replace::

        :func:`~ci_exec.parsers.utils.env_or_platform_default`
    """
    kwargs = dict(
        env="CC",
        windows="cl.exe",
        darwin="clang",
        other="gcc"
    )
    cc = env_or_platform_default(**kwargs)
    system = platform.system()
    if system == "Windows":
        assert cc == "cl.exe"
    elif system == "Darwin":
        assert cc == "clang"
    else:
        assert cc == "gcc"

    with set_env(CC="supercompiler"):
        cc = env_or_platform_default(**kwargs)
        assert cc == "supercompiler"