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import pytest
from diff_cover import config_parser
from diff_cover.config_parser import ParserError, TOMLParser, Tool, get_config
tools = pytest.mark.parametrize("tool", list(Tool))
class TestTOMLParser:
@tools
def test_parse_no_toml_file(self, tool):
parser = TOMLParser("myfile", tool)
assert parser.parse() is None
@tools
def test_parse_but_no_tomli_installed(self, tool, mocker):
mocker.patch.object(config_parser, "_HAS_TOML", False)
parser = TOMLParser("myfile.toml", tool)
with pytest.raises(ParserError):
parser.parse()
@pytest.mark.parametrize(
"tool,content",
[
(Tool.DIFF_COVER, ""),
(Tool.DIFF_COVER, "[tool.diff_quality]"),
(Tool.DIFF_QUALITY, ""),
(Tool.DIFF_COVER, "[tool.diff_cover]"),
],
)
def test_parse_but_no_data(self, tool, content, tmp_path):
toml_file = tmp_path / "foo.toml"
toml_file.write_text(content)
parser = TOMLParser(str(toml_file), tool)
with pytest.raises(ParserError):
parser.parse()
@pytest.mark.parametrize(
"tool,content,expected",
[
(Tool.DIFF_COVER, "[tool.diff_cover]\nquiet=true", {"quiet": True}),
(Tool.DIFF_QUALITY, "[tool.diff_quality]\nquiet=true", {"quiet": True}),
],
)
def test_parse(self, tool, content, tmp_path, expected):
toml_file = tmp_path / "foo.toml"
toml_file.write_text(content)
parser = TOMLParser(str(toml_file), tool)
assert parser.parse() == expected
@tools
def test_get_config_unrecognized_file(mocker, tool):
parser = mocker.Mock()
parser.parse_args().__dict__ = {"config_file": "foo.bar"}
with pytest.raises(ParserError):
get_config(parser, argv=[], defaults={}, tool=tool)
@pytest.mark.parametrize(
"tool,cli_config,defaults,file_content,expected",
[
(
Tool.DIFF_COVER,
{"a": 2, "b": None, "c": None},
{"a": 4, "b": 3},
None,
{"a": 2, "b": 3, "c": None},
),
(
Tool.DIFF_QUALITY,
{"a": 2, "b": None, "c": None},
{"a": 4, "b": 3},
None,
{"a": 2, "b": 3, "c": None},
),
(
Tool.DIFF_COVER,
{"a": 2, "b": None, "c": None, "d": None},
{"a": 4, "b": 3},
"[tool.diff_cover]\na=1\nd=6",
{"a": 2, "b": 3, "c": None, "d": 6},
),
],
)
def test_get_config(
mocker, tmp_path, tool, cli_config, defaults, file_content, expected
):
if file_content:
toml_file = tmp_path / "foo.toml"
toml_file.write_text(file_content)
cli_config["config_file"] = expected["config_file"] = str(toml_file)
else:
cli_config["config_file"] = expected["config_file"] = None
parser = mocker.Mock()
parser.parse_args().__dict__ = cli_config
assert get_config(parser, argv=[], defaults=defaults, tool=tool) == expected
@pytest.mark.parametrize(
"tool,content,expected_exclude",
[
(Tool.DIFF_COVER, '[tool.diff_cover]\nexclude="*.pyc"', ["*.pyc"]),
(Tool.DIFF_QUALITY, '[tool.diff_quality]\nexclude="*.pyc"', ["*.pyc"]),
],
)
def test_normalize_exclude_string(mocker, tmp_path, tool, content, expected_exclude):
"""String exclude from TOML should be normalized to list."""
toml_file = tmp_path / "foo.toml"
toml_file.write_text(content)
cli_config = {"config_file": str(toml_file), "exclude": None}
parser = mocker.Mock()
parser.parse_args().__dict__ = cli_config
result = get_config(parser, argv=[], defaults={}, tool=tool)
assert result["exclude"] == expected_exclude
@pytest.mark.parametrize(
"tool,content,expected_exclude",
[
(
Tool.DIFF_COVER,
'[tool.diff_cover]\nexclude=["*.pyc", "*.pyo"]',
["*.pyc", "*.pyo"],
),
(
Tool.DIFF_QUALITY,
'[tool.diff_quality]\nexclude=["*.pyc", "*.pyo"]',
["*.pyc", "*.pyo"],
),
],
)
def test_exclude_list_unchanged(mocker, tmp_path, tool, content, expected_exclude):
"""List exclude from TOML should remain as list."""
toml_file = tmp_path / "foo.toml"
toml_file.write_text(content)
cli_config = {"config_file": str(toml_file), "exclude": None}
parser = mocker.Mock()
parser.parse_args().__dict__ = cli_config
result = get_config(parser, argv=[], defaults={}, tool=tool)
assert result["exclude"] == expected_exclude
@pytest.mark.parametrize(
"tool,content,expected_include",
[
(Tool.DIFF_COVER, '[tool.diff_cover]\ninclude="src/**"', ["src/**"]),
(Tool.DIFF_QUALITY, '[tool.diff_quality]\ninclude="src/**"', ["src/**"]),
],
)
def test_normalize_include_string(mocker, tmp_path, tool, content, expected_include):
"""String include from TOML should be normalized to list."""
toml_file = tmp_path / "foo.toml"
toml_file.write_text(content)
cli_config = {"config_file": str(toml_file), "include": None}
parser = mocker.Mock()
parser.parse_args().__dict__ = cli_config
result = get_config(parser, argv=[], defaults={}, tool=tool)
assert result["include"] == expected_include
def test_get_config_normalizes_both_patterns(mocker, tmp_path):
"""get_config should normalize both exclude and include from TOML files."""
toml_file = tmp_path / "foo.toml"
toml_file.write_text('[tool.diff_cover]\nexclude="*.pyc"\ninclude="src/**"')
cli_config = {"config_file": str(toml_file), "exclude": None, "include": None}
parser = mocker.Mock()
parser.parse_args().__dict__ = cli_config
result = get_config(parser, argv=[], defaults={}, tool=Tool.DIFF_COVER)
assert result["exclude"] == ["*.pyc"]
assert result["include"] == ["src/**"]
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