added unit test for job pool

tests/unit_tests/test_job_pool.py

@@ -0,0 +1,19 @@
+import unittest
+
+from oktoberfest.utils.multiprocessing_pool import JobPool
+
+
+def add_one(i: int):
+    """Test function for multiprocessing pool."""
+    return i + 1
+
+
+class TestJobPool(unittest.TestCase):
+    """Test the JobPool class."""
+
+    def test_jobpool(self):
+        """Unit test for starting and joining multiprocessing pool."""
+        pool = JobPool(2)
+        for i in range(5):
+            pool.apply_async(add_one, [i])
+        pool.check_pool()