Add pytest setup and configuration tests

Configure pytest in pyproject.toml to import the repo copy, add a conftest that keeps tests out of the journal and desktop notifications, and test reading the config file and expanding paths.

tests/test_config.py

@@ -0,0 +1,229 @@
+"""Tests for reading the configuration file and expanding paths"""
+
+import configparser
+import os
+import pwd
+from pathlib import Path
+
+import pytest
+
+from simple_backup import simple_backup as sb
+
+USER = pwd.getpwuid(os.getuid()).pw_name
+HOME = pwd.getpwuid(os.getuid()).pw_dir
+
+
+def write_config(path: Path, text: str) -> str:
+    config_file = path / 'simple_backup.conf'
+    config_file.write_text(text)
+
+    return str(config_file)
+
+
+def test_repo_copy_imported() -> None:
+    repo = Path(__file__).resolve().parents[1]
+
+    assert Path(sb.__file__).resolve().is_relative_to(repo)
+
+
+@pytest.mark.parametrize('path, expected', [
+    ('~', HOME),
+    ('~/docs', f'{HOME}/docs'),
+    ('/abs/~/path', '/abs/~/path'),
+    ('relative', 'relative'),
+])
+def test_expand_home(path: str, expected: str) -> None:
+    assert sb._expand_home(path, USER) == expected
+
+
+def test_expand_inputs_glob(tmp_path: Path) -> None:
+    for name in ['a.txt', 'b.txt', 'c.log']:
+        (tmp_path / name).touch()
+
+    result = sb._expand_inputs([f'{tmp_path}/*.txt', ''], USER)
+
+    assert sorted(result) == [f'{tmp_path}/a.txt', f'{tmp_path}/b.txt']
+
+
+def test_expand_inputs_no_match(tmp_path: Path, caplog: pytest.LogCaptureFixture) -> None:
+    assert sb._expand_inputs([f'{tmp_path}/missing'], USER) == []
+    assert 'No file or directory matching input' in caplog.text
+
+
+def test_expand_inputs_tilde_without_user(caplog: pytest.LogCaptureFixture) -> None:
+    sb._expand_inputs(['~/nothing-here'], None)
+
+    assert 'Cannot expand' in caplog.text
+
+
+def test_missing_config(tmp_path: Path, caplog: pytest.LogCaptureFixture) -> None:
+    config_args = sb._read_config(str(tmp_path / 'missing.conf'), USER)
+
+    assert config_args['inputs'] is None
+    assert config_args['output'] is None
+    assert config_args['keep'] == -1
+    assert 'does not exist' in caplog.text
+
+
+def test_missing_config_without_user(tmp_path: Path, caplog: pytest.LogCaptureFixture) -> None:
+    sb._read_config(str(tmp_path / 'missing.conf'), None)
+
+    assert 'User not specified' in caplog.text
+
+
+def test_read_config(tmp_path: Path) -> None:
+    (tmp_path / 'one').mkdir()
+    (tmp_path / 'two').mkdir()
+
+    config_file = write_config(tmp_path, f"""
+[backup]
+inputs={tmp_path}/one, {tmp_path}/two, {tmp_path}/one
+backup_dir=~/backups
+exclude=*.bak, , *.tmp
+keep=3
+""")
+
+    config_args = sb._read_config(config_file, USER)
+
+    assert sorted(config_args['inputs']) == [f'{tmp_path}/one', f'{tmp_path}/two']
+    # Expanded later, as it may be a path on the server
+    assert config_args['output'] == '~/backups'
+    assert config_args['exclude'] == ['*.bak', '*.tmp']
+    assert config_args['keep'] == 3
+    assert config_args['ssh_host'] is None
+    assert config_args['ssh_user'] is None
+    assert config_args['ssh_keyfile'] is None
+    assert config_args['remote_sudo'] is False
+    assert config_args['numeric_ids'] is False
+
+
+def test_optional_keys_missing(tmp_path: Path) -> None:
+    config_file = write_config(tmp_path, f"""
+[backup]
+inputs={tmp_path}
+backup_dir=/backups
+""")
+
+    config_args = sb._read_config(config_file, USER)
+
+    assert config_args['exclude'] == []
+    assert config_args['keep'] == -1
+
+
+def test_old_default_section(tmp_path: Path) -> None:
+    config_file = write_config(tmp_path, f"""
+[default]
+inputs={tmp_path}
+backup_dir=/backups
+""")
+
+    config_args = sb._read_config(config_file, USER)
+
+    assert config_args['inputs'] == [str(tmp_path)]
+    assert config_args['output'] == '/backups'
+
+
+def test_percent_in_values(tmp_path: Path) -> None:
+    config_file = write_config(tmp_path, f"""
+[backup]
+inputs={tmp_path}
+backup_dir=/backups/100%
+exclude=%temp%
+""")
+
+    config_args = sb._read_config(config_file, USER)
+
+    assert config_args['output'] == '/backups/100%'
+    assert config_args['exclude'] == ['%temp%']
+
+
+def test_server_section(tmp_path: Path) -> None:
+    config_file = write_config(tmp_path, f"""
+[backup]
+inputs={tmp_path}
+backup_dir=backups
+
+[server]
+ssh_host=server
+ssh_user=user
+ssh_keyfile=/keys/id_ed25519
+remote_sudo=yes
+numeric_ids=true
+""")
+
+    config_args = sb._read_config(config_file, USER)
+
+    assert config_args['ssh_host'] == 'server'
+    assert config_args['ssh_user'] == 'user'
+    assert config_args['ssh_keyfile'] == '/keys/id_ed25519'
+    assert config_args['remote_sudo'] is True
+    assert config_args['numeric_ids'] is True
+
+
+def test_empty_server_values(tmp_path: Path) -> None:
+    config_file = write_config(tmp_path, f"""
+[backup]
+inputs={tmp_path}
+backup_dir=/backups
+
+[server]
+ssh_host=
+ssh_user=
+ssh_keyfile=
+remote_sudo=
+numeric_ids=
+""")
+
+    config_args = sb._read_config(config_file, USER)
+
+    for key in ['ssh_host', 'ssh_user', 'ssh_keyfile']:
+        assert config_args[key] is None
+
+    assert config_args['remote_sudo'] is False
+    assert config_args['numeric_ids'] is False
+
+
+def test_only_ssh_host(tmp_path: Path) -> None:
+    config_file = write_config(tmp_path, f"""
+[backup]
+inputs={tmp_path}
+backup_dir=/backups
+
+[server]
+ssh_host=server
+""")
+
+    config_args = sb._read_config(config_file, USER)
+
+    # Kept, so that the missing user is reported instead of silently backing up locally
+    assert config_args['ssh_host'] == 'server'
+    assert config_args['ssh_user'] is None
+
+
+@pytest.mark.parametrize('line', ['keep=abc', 'remote_sudo=maybe'])
+def test_bad_value(tmp_path: Path, line: str) -> None:
+    section = '[server]' if line.startswith('remote_sudo') else ''
+
+    config_file = write_config(tmp_path, f"""
+[backup]
+inputs={tmp_path}
+backup_dir=/backups
+{section}
+{line}
+""")
+
+    with pytest.raises(ValueError):
+        sb._read_config(config_file, USER)
+
+
+@pytest.mark.parametrize('text', [
+    '[backup]\nbackup_dir=/backups\n',
+    '[backup]\ninputs=/tmp\n',
+    '[other]\ninputs=/tmp\n',
+    'inputs=/tmp\n',
+])
+def test_bad_config(tmp_path: Path, text: str) -> None:
+    config_file = write_config(tmp_path, text)
+
+    with pytest.raises(configparser.Error):
+        sb._read_config(config_file, USER)