fix: implement list_jobs method and add test suite

matrix/scheduler.py

@@ -18,6 +18,10 @@ def __init__(self) -> None:
     def jobs(self) -> list[Job]:
         return cast(list[Job], self.scheduler.get_jobs())
 
+    def list_jobs(self) -> list[str]:
+        """Return a list of names of all registered jobs."""
+        return [job.name for job in self.jobs]
+
     def _parse_cron(self, cron: str) -> dict:
         """
         Parse a cron string into a dictionary suitable for CronTrigger.

tests/test_scheduler.py

@@ -0,0 +1,22 @@
+import pytest
+from matrixpy.scheduler import Scheduler
+
+
+def test_list_jobs_expect_empty() -> None:
+    """Verify list_jobs returns an empty list on initialization."""
+    scheduler = Scheduler()
+    assert scheduler.list_jobs() == []
+
+
+def test_list_jobs_with_active_jobs() -> None:
+    """Verify list_jobs returns the names of the scheduled jobs."""
+    scheduler = Scheduler()
+
+    class MockJob:
+
+        def __init__(self, name: str) -> None:
+            self.name: str = name
+
+    scheduler.jobs = [MockJob("job_1"), MockJob("job_2")]
+
+    assert scheduler.list_jobs() == ["job_1", "job_2"]