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import sys
import pytest
from diff_cover import util
def test_to_unix_path():
"""
Ensure the _to_unix_path static function handles paths properly.
"""
assert util.to_unix_path("foo/bar") == "foo/bar"
assert util.to_unix_path("foo\\bar") == "foo/bar"
# Ensure the paths are temporally stable
assert util.to_unix_path(util.to_unix_path("foo/bar")) == "foo/bar"
assert util.to_unix_path(util.to_unix_path("foo\\bar")) == "foo/bar"
if sys.platform.startswith("win"):
assert util.to_unix_path("FOO\\bar") == "foo/bar"
assert util.to_unix_path(util.to_unix_path("FOO\\bar")) == "foo/bar"
def test_to_unescaped_filename():
"""Test the to_unescaped_filename function."""
assert util.to_unescaped_filename('"\\\\\\\\"') == "\\\\"
assert util.to_unescaped_filename('"\\\\"') == "\\"
assert util.to_unescaped_filename('"\\"\\\\"') == '"\\'
assert util.to_unescaped_filename('"\\""') == '"'
assert util.to_unescaped_filename("some_file.py") == "some_file.py"
assert util.to_unescaped_filename("#$%") == "#$%"
def test_open_file(tmp_path):
"""Test the open_file function."""
with util.open_file(tmp_path / "some_file.txt", "w") as f:
f.write("test")
with util.open_file(tmp_path / "some_file.txt", "r") as f:
assert f.read() == "test"
with util.open_file(tmp_path / "some_file.txt", "wb") as f:
f.write(b"test")
with util.open_file(tmp_path / "some_file.txt", "rb") as f:
assert f.read() == b"test"
@pytest.mark.usefixtures("capsys")
def test_open_file_sys_std():
"""Test the open_file function."""
with util.open_file("-", "w") as f:
assert f == sys.stdout
with util.open_file("/dev/stdout", "bw") as f:
assert f == sys.stdout.buffer
with util.open_file("/dev/stderr", "w") as f:
assert f == sys.stderr
with util.open_file("/dev/stderr", "bw") as f:
assert f == sys.stderr.buffer
def test_open_file_encoding(tmp_path):
"""Test the open_file function with encoding."""
with util.open_file(tmp_path / "some_file.txt", "w", encoding="utf-16") as f:
assert f.encoding == "utf-16"
f.write("café naïve résumé")
with util.open_file(tmp_path / "some_file.txt", "r", encoding="utf-16") as f:
assert f.encoding == "utf-16"
assert f.read() == "café naïve résumé"
with pytest.raises(UnicodeDecodeError):
with util.open_file(tmp_path / "some_file.txt", "r", encoding="utf-8") as f:
f.read()
def test_open_file_encoding_binary(tmp_path):
"""Test the open_file function with encoding in binary mode."""
with util.open_file(tmp_path / "some_file.txt", "bw", encoding="utf-16") as f:
assert not hasattr(f, "encoding")
f.write(b"cafe naive resume")
with util.open_file(tmp_path / "some_file.txt", "br", encoding="utf-16") as f:
assert not hasattr(f, "encoding")
assert f.read() == b"cafe naive resume"
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