added tests for utils

utils_test.py

+import unittest
+from utils import (
+    process_mllp_message,
+    parse_hl7_message,
+    create_acknowledgement,
+)
+import hl7
+
+
+class TestUtilsClient(unittest.TestCase):
+    def test_process_mllp_message(self):
+        """
+        Test processing of MLLP messages.
+        """
+        mllp_message = b"\x0bMSH|^~\&|SIMULATION|SOUTH RIVERSIDE|||20240212131600||ADT^A01|||2.5\x1c\x0d"
+        expected_result = (
+            b"MSH|^~\&|SIMULATION|SOUTH RIVERSIDE|||20240212131600||ADT^A01|||2.5"
+        )
+        self.assertEqual(process_mllp_message(mllp_message), expected_result)
+
+    def test_parse_hl7_message(self):
+        """
+        Test parsing of HL7 messages.
+        """
+        hl7_message = (
+            "MSH|^~\&|SIMULATION|SOUTH RIVERSIDE|||20240212131600||ADT^A01|||2.5"
+        ).encode()
+        parsed_message = parse_hl7_message(hl7_message)
+        self.assertIsInstance(parsed_message, hl7.Message)
+        self.assertTrue("MSH" in str(parsed_message))
+
+    def test_create_acknowledgement(self):
+        """
+        Test creation of HL7 ACK messages.
+        """
+        hl7_msg = hl7.parse(
+            "MSH|^~\&|SIMULATION|SOUTH RIVERSIDE|||20240212131600||ADT^A01|||2.5"
+        )
+        ack_message = create_acknowledgement(hl7_msg)
+        self.assertIn(b"MSH", ack_message)
+        self.assertIn(b"ACK", ack_message)
+        self.assertIn(b"MSA|AA|", ack_message)
+
+
+if __name__ == "__main__":
+    unittest.main()