# ========= Copyright 2026 @ Strukto.AI All Rights Reserved. =========
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
# ========= Copyright 2026 @ Strukto.AI All Rights Reserved. =========

import shutil

import pytest

skip_no_tac = pytest.mark.skipif(
    shutil.which("tac") is None,
    reason="tac is GNU coreutils; macOS ships tail -r instead",
)


@skip_no_tac
def test_tac_stdin(env):
    data = b"a\nb\nc\n"
    assert env.mirage("tac", stdin=data) == env.native("tac", stdin=data)


@skip_no_tac
def test_tac_file(env):
    env.create_file("f.txt", b"1\n2\n3\n")
    assert env.mirage("tac /data/f.txt") == env.native("tac f.txt")
