tests/check_json_test.py

import pytest

from pre_commit_hooks.check_json import main
from testing.util import get_resource_path


@pytest.mark.parametrize(
    ('filename', 'expected_retval'), (
        ('bad_json.notjson', 1),
        ('bad_json_latin1.nonjson', 1),
        ('ok_json.json', 0),
    ),
)
def test_main(capsys, filename, expected_retval):
    ret = main([get_resource_path(filename)])
    assert ret == expected_retval
    if expected_retval == 1:
        stdout, _ = capsys.readouterr()
        assert filename in stdout