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odysseus/tests/test_prefs_single_user_no_clobber.py

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Python

"""Saving prefs with auth disabled must not wipe a multi-user store.
When auth is disabled get_current_user returns None. _save_for_user(None,...)
wrote prefs flat, overwriting the entire {"_users": {...}} map and destroying
every other user's preferences (a realistic ops transition: auth turned off
on a deployment that previously ran multi-user). It must preserve the other
users and round-trip the change into the same (first) slot _load_for_user
reads from.
"""
import json
import routes.prefs_routes as pr
def test_single_user_save_preserves_other_users(tmp_path, monkeypatch):
f = tmp_path / "user_prefs.json"
f.write_text(json.dumps({"_users": {
"alice": {"theme": "light"},
"bob": {"theme": "paper"},
}}), encoding="utf-8")
monkeypatch.setattr(pr, "PREFS_FILE", str(f))
# auth disabled: load (first user) -> modify -> save
current = pr._load_for_user(None)
current["theme"] = "dark"
pr._save_for_user(None, current)
data = json.loads(f.read_text())
assert "_users" in data, "multi-user store was clobbered"
assert "bob" in data["_users"] and data["_users"]["bob"] == {"theme": "paper"}
# the change round-tripped into the first user's slot
assert data["_users"]["alice"]["theme"] == "dark"
def test_legacy_flat_store_still_saved_flat(tmp_path, monkeypatch):
f = tmp_path / "user_prefs.json"
f.write_text(json.dumps({"theme": "light"}), encoding="utf-8")
monkeypatch.setattr(pr, "PREFS_FILE", str(f))
pr._save_for_user(None, {"theme": "dark"})
data = json.loads(f.read_text())
assert data == {"theme": "dark"}
def test_named_user_save_unaffected(tmp_path, monkeypatch):
f = tmp_path / "user_prefs.json"
f.write_text(json.dumps({"_users": {"alice": {"theme": "light"}}}), encoding="utf-8")
monkeypatch.setattr(pr, "PREFS_FILE", str(f))
pr._save_for_user("bob", {"theme": "dark"})
data = json.loads(f.read_text())
assert data["_users"]["alice"] == {"theme": "light"}
assert data["_users"]["bob"] == {"theme": "dark"}