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tests/test_jalali_templates.py

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+from datetime import datetime, timezone as dt_timezone
+
+from apps.core.templatetags.jalali import jalali_date, jalali_datetime, persian_time
+
+
+def test_jalali_datetime_uses_iran_time_persian_month_and_digits():
+    value = datetime(2026, 9, 6, 5, 0, tzinfo=dt_timezone.utc)
+    assert jalali_datetime(value) == "۱۵ شهریور ۱۴۰۵، ساعت ۰۸:۳۰"
+    assert jalali_date(value) == "۱۵ شهریور ۱۴۰۵"
+    assert persian_time(value) == "۰۸:۳۰"
+
+
+def test_jalali_filters_fail_safely_for_empty_values():
+    assert jalali_datetime(None) == ""
+    assert jalali_date(None) == ""
+    assert persian_time(None) == ""