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"""Tests for hooks/_common.py — read_referenced_file and scan_attribution."""
import sys
from pathlib import Path
HOOKS_DIR = Path(__file__).resolve().parent.parent
if str(HOOKS_DIR) not in sys.path:
sys.path.insert(0, str(HOOKS_DIR))
import _common # noqa: E402
# --- read_referenced_file: normal cases ------------------------------------
def test_read_referenced_file_returns_content(tmp_path):
f = tmp_path / "msg.txt"
f.write_text("hello world\n")
assert _common.read_referenced_file(str(f)) == "hello world\n"
def test_read_referenced_file_expands_user(tmp_path, monkeypatch):
# Point HOME at tmp_path so ~/msg.txt resolves under it.
monkeypatch.setenv("HOME", str(tmp_path))
monkeypatch.setattr(Path, "home", lambda: tmp_path, raising=False)
f = tmp_path / "msg.txt"
f.write_text("tilde body")
assert _common.read_referenced_file("~/msg.txt") == "tilde body"
# --- read_referenced_file: error / boundary cases --------------------------
def test_read_referenced_file_missing_returns_none(tmp_path):
assert _common.read_referenced_file(str(tmp_path / "nope.txt")) is None
def test_read_referenced_file_directory_returns_none(tmp_path):
# A directory is not a regular file.
assert _common.read_referenced_file(str(tmp_path)) is None
def test_read_referenced_file_oversized_returns_none(tmp_path):
f = tmp_path / "big.txt"
f.write_text("x" * 50)
assert _common.read_referenced_file(str(f), max_bytes=10) is None
def test_read_referenced_file_at_limit_is_read(tmp_path):
f = tmp_path / "edge.txt"
f.write_text("12345") # exactly 5 bytes
assert _common.read_referenced_file(str(f), max_bytes=5) == "12345"
def test_read_referenced_file_invalid_utf8_returns_none(tmp_path):
f = tmp_path / "bin.dat"
f.write_bytes(b"\xff\xfe\x00bad")
assert _common.read_referenced_file(str(f)) is None
def test_read_referenced_file_empty_string_path_returns_none():
assert _common.read_referenced_file("") is None
# --- scan_attribution sanity (relied on by the file-backed tests) ----------
def test_scan_attribution_catches_coauthor():
assert _common.scan_attribution("Co-Authored-By: Claude")
def test_scan_attribution_catches_robot_emoji():
assert _common.scan_attribution("nice work \U0001F916")
def test_scan_attribution_clean_text_empty():
assert _common.scan_attribution("fix: tidy up the parser") == []
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