feat: repeat tasks after completion

tests/test_migration_recurrence_trigger_modes.py

@@ -0,0 +1,56 @@
+import os
+import sqlite3
+import subprocess
+from pathlib import Path
+
+
+def run_alembic(repo: Path, database: Path, *args: str) -> subprocess.CompletedProcess[str]:
+    env = os.environ.copy()
+    env["DODO_DATABASE_URL"] = f"sqlite+aiosqlite:///{database}"
+    return subprocess.run(
+        ["uv", "run", "alembic", *args],
+        cwd=repo,
+        env=env,
+        text=True,
+        capture_output=True,
+        check=False,
+    )
+
+
+def test_recurrence_trigger_migration_downgrade_and_reupgrade_with_data(tmp_path: Path):
+    repo = Path(__file__).resolve().parents[1]
+    database = tmp_path / "migration.sqlite3"
+    assert run_alembic(repo, database, "upgrade", "0015_purge_operations").returncode == 0
+
+    with sqlite3.connect(database) as connection:
+        connection.execute(
+            "INSERT INTO recurrence_templates "
+            "(id, user_id, task_id, rrule, starts_at, ends_at, created_at) "
+            "VALUES (?, ?, ?, ?, ?, ?, ?)",
+            (
+                "00000000000000000000000000000001",
+                "00000000000000000000000000000002",
+                "00000000000000000000000000000003",
+                "FREQ=DAILY",
+                "2026-03-08 07:30:00",
+                None,
+                "2026-03-01 00:00:00",
+            ),
+        )
+
+    upgraded = run_alembic(repo, database, "upgrade", "0016_recurrence_trigger_modes")
+    assert upgraded.returncode == 0, upgraded.stderr
+    with sqlite3.connect(database) as connection:
+        connection.execute(
+            "UPDATE recurrence_templates SET trigger_mode='after_completion', "
+            "after_completion_days=1, rrule=NULL"
+        )
+
+    downgraded = run_alembic(repo, database, "downgrade", "0015_purge_operations")
+    assert downgraded.returncode == 0, downgraded.stderr
+    with sqlite3.connect(database) as connection:
+        row = connection.execute("SELECT rrule FROM recurrence_templates").fetchone()
+        assert row == ("FREQ=DAILY;INTERVAL=1",)
+
+    reupgraded = run_alembic(repo, database, "upgrade", "0016_recurrence_trigger_modes")
+    assert reupgraded.returncode == 0, reupgraded.stderr