change date and timezone to iran format

apps/core/tests.py

@@ -1,5 +1,9 @@
-from django.test import TestCase
+from datetime import date, datetime, time, timedelta, timezone as dt_timezone
 
+import jdatetime
+from django.test import TestCase, override_settings
+
+from apps.core.jalali import jalali_date, jalali_datetime, jalali_time
 from apps.core.settings_service import SettingsService
 
 
@@ -19,3 +23,54 @@ class SettingsServiceTests(TestCase):
         service.set("odoo.api_key", "super-secret")
         values = service.all_values()
         self.assertEqual(values["odoo.api_key"], "••••••")
+
+
+class JalaliTests(TestCase):
+    """The PDF and the customer SMS are the only places dates are rendered for
+    humans; the API itself stays on ISO-8601."""
+
+    def test_known_reference_dates(self):
+        self.assertEqual(jalali_date(date(2026, 3, 21)), "1405/01/01")  # Nowruz 1405
+        self.assertEqual(jalali_date(date(2026, 3, 14)), "1404/12/23")
+        self.assertEqual(jalali_date(date(1979, 2, 11)), "1357/11/22")
+
+    def test_round_trips_against_jdatetime_over_two_decades(self):
+        """A conversion error here silently misdates a quality report."""
+        day = date(2020, 1, 1)
+        end = date(2040, 1, 1)
+        while day < end:
+            expected = jdatetime.date.fromgregorian(date=day)
+            self.assertEqual(
+                jalali_date(day),
+                f"{expected.year:04d}/{expected.month:02d}/{expected.day:02d}",
+            )
+            day += timedelta(days=1)
+
+    def test_accepts_iso_strings(self):
+        self.assertEqual(jalali_date("2026-03-14"), "1404/12/23")
+        self.assertEqual(jalali_datetime("2026-03-14T05:00:00+00:00")[:10], "1404/12/23")
+
+    def test_blank_and_malformed_input_is_empty_not_an_error(self):
+        for value in (None, "", "not-a-date", 0):
+            self.assertEqual(jalali_date(value), "")
+            self.assertEqual(jalali_datetime(value), "")
+
+    @override_settings(TIME_ZONE="Asia/Tehran")
+    def test_aware_datetimes_render_in_the_project_time_zone(self):
+        # 20:30Z is already the next calendar day in Tehran (+03:30).
+        moment = datetime(2026, 3, 14, 20, 30, tzinfo=dt_timezone.utc)
+        self.assertEqual(jalali_datetime(moment), "1404/12/24 00:00")
+
+    @override_settings(TIME_ZONE="UTC")
+    def test_aware_datetimes_follow_the_configured_zone(self):
+        moment = datetime(2026, 3, 14, 20, 30, tzinfo=dt_timezone.utc)
+        self.assertEqual(jalali_datetime(moment), "1404/12/23 20:30")
+
+    def test_naive_datetimes_are_left_alone(self):
+        self.assertEqual(jalali_datetime(datetime(2026, 3, 14, 8, 5)), "1404/12/23 08:05")
+
+    def test_times(self):
+        self.assertEqual(jalali_time(time(8, 0)), "08:00")
+        self.assertEqual(jalali_time("08:30:15"), "08:30")
+        self.assertEqual(jalali_time("09:05"), "09:05")
+        self.assertEqual(jalali_time(""), "")