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"""Sphinx test comparer for pytest
"""
import difflib
import pathlib
from typing import Any, List, Union
class PathComparer:
"""
OS-independent path comparison.
Windows path sep and posix path sep:
>>> '\\to\\index' == PathComparer('/to/index')
True
>>> '\\to\\index' == PathComparer('/to/index2')
False
Windows path with drive letters
>>> 'C:\\to\\index' == PathComparer('/to/index')
True
>>> 'C:\\to\\index' == PathComparer('C:/to/index')
True
>>> 'C:\\to\\index' == PathComparer('D:/to/index')
False
"""
def __init__(self, path: Union[str, pathlib.Path]):
"""
:param str path: path string, it will be cast as pathlib.Path.
"""
self.path = pathlib.Path(path)
def __str__(self) -> str:
return self.path.as_posix()
def __repr__(self) -> str:
return "<{0.__class__.__name__}: '{0}'>".format(self)
def __eq__(self, other: Union[str, pathlib.Path]) -> bool: # type: ignore
return not bool(self.ldiff(other))
def diff(self, other: Union[str, pathlib.Path]) -> List[str]:
"""compare self and other.
When different is not exist, return empty list.
>>> PathComparer('/to/index').diff('C:\\to\\index')
[]
When different is exist, return unified diff style list as:
>>> PathComparer('/to/index').diff('C:\\to\\index2')
[
'- C:/to/index'
'+ C:/to/index2'
'? +'
]
"""
return self.ldiff(other)
def ldiff(self, other: Union[str, pathlib.Path]) -> List[str]:
return self._diff(
self.path,
pathlib.Path(other),
)
def rdiff(self, other: Union[str, pathlib.Path]) -> List[str]:
return self._diff(
pathlib.Path(other),
self.path,
)
def _diff(self, lhs: pathlib.Path, rhs: pathlib.Path) -> List[str]:
if lhs == rhs:
return []
if lhs.drive or rhs.drive:
# If either has a drive letter compare by absolute path
s_path, o_path = lhs.absolute().as_posix(), rhs.absolute().as_posix()
else:
s_path, o_path = lhs.as_posix(), rhs.as_posix()
if s_path == o_path:
return []
return [line.strip() for line in difflib.Differ().compare([s_path], [o_path])]
def pytest_assertrepr_compare(op: str, left: Any, right: Any) -> List[str]:
if isinstance(left, PathComparer) and op == "==":
return ['Comparing path:'] + left.ldiff(right)
elif isinstance(right, PathComparer) and op == "==":
return ['Comparing path:'] + right.rdiff(left)
else:
return []
|
