Squash Odysseus development history

tests/test_ics_escape.py

@@ -0,0 +1,41 @@
+"""Tests for iCalendar TEXT escaping in calendar export (RFC 5545 §3.3.11)."""
+from tests.helpers.calendar_routes import import_calendar_routes
+
+
+def _esc():
+    return import_calendar_routes()._ics_escape
+
+
+def test_escapes_comma_and_semicolon():
+    # Regression: SUMMARY/LOCATION escaped nothing, so a comma/semicolon
+    # (structural in iCal TEXT values) corrupted the field in other clients.
+    assert _esc()("Lunch, dinner; meeting") == "Lunch\\, dinner\\; meeting"
+
+
+def test_escapes_backslash_first():
+    assert _esc()("path C:\\tmp") == "path C:\\\\tmp"
+
+
+def test_newlines_become_literal_backslash_n():
+    assert _esc()("line1\nline2\r\nline3") == "line1\\nline2\\nline3"
+
+
+def test_empty_and_none_safe():
+    assert _esc()("") == ""
+    assert _esc()(None) == ""
+
+
+def test_safe_ics_filename_strips_header_metacharacters():
+    safe_filename = import_calendar_routes()._safe_ics_filename
+
+    assert (
+        safe_filename('Work\r\nX-Injected: yes";/..\\evil')
+        == "Work__X-Injected__yes___.._evil.ics"
+    )
+
+
+def test_safe_ics_filename_falls_back_for_empty_names():
+    safe_filename = import_calendar_routes()._safe_ics_filename
+
+    assert safe_filename("////") == "calendar.ics"
+    assert safe_filename(None) == "calendar.ics"