Add periodic exchange task management API

tests/apps/exchange/test_serializers.py

@@ -1,6 +1,11 @@
 """Tests for exchange serializers."""
 
-from apps.exchange.serializers import ExchangeCopyRequestSerializer
+from types import SimpleNamespace
+
+from apps.exchange.serializers import (
+    ExchangeCopyRequestSerializer,
+    ExchangePeriodicTaskUpsertSerializer,
+)
 from django.test import SimpleTestCase
 
 
@@ -27,3 +32,61 @@ class ExchangeCopyRequestSerializerTest(SimpleTestCase):
         )
         self.assertFalse(serializer_with_tables.is_valid())
         self.assertIn("tables", serializer_with_tables.errors)
+
+
+class ExchangePeriodicTaskUpsertSerializerTest(SimpleTestCase):
+    def test_interval_schedule_requires_fields(self):
+        serializer = ExchangePeriodicTaskUpsertSerializer(
+            data={"name": "copy-job", "schedule_type": "interval"}
+        )
+
+        self.assertFalse(serializer.is_valid())
+        self.assertIn("interval_every", serializer.errors)
+        self.assertIn("interval_period", serializer.errors)
+
+    def test_crontab_schedule_requires_fields(self):
+        serializer = ExchangePeriodicTaskUpsertSerializer(
+            data={"name": "copy-job", "schedule_type": "crontab"}
+        )
+
+        self.assertFalse(serializer.is_valid())
+        self.assertIn("crontab_minute", serializer.errors)
+        self.assertIn("crontab_hour", serializer.errors)
+
+    def test_update_mode_to_all_clears_old_single_table(self):
+        instance = SimpleNamespace(
+            interval_id=1,
+            interval=SimpleNamespace(every=5, period="minutes"),
+            crontab_id=None,
+            kwargs='{"payload": {"mode": "single", "table": "old_table"}}',
+        )
+        serializer = ExchangePeriodicTaskUpsertSerializer(
+            instance,
+            data={"mode": "all"},
+            partial=True,
+        )
+
+        self.assertTrue(serializer.is_valid(), serializer.errors)
+        self.assertEqual(
+            serializer.validated_data["payload"],
+            {
+                "mode": "all",
+                "table": None,
+                "tables": None,
+                "truncate_before_copy": True,
+            },
+        )
+
+    def test_periodic_task_uses_copy_payload_validation(self):
+        serializer = ExchangePeriodicTaskUpsertSerializer(
+            data={
+                "name": "copy-job",
+                "schedule_type": "interval",
+                "interval_every": 1,
+                "interval_period": "hours",
+                "mode": "single",
+            }
+        )
+
+        self.assertFalse(serializer.is_valid())
+        self.assertIn("table", serializer.errors)