Attempt at writing unit test for 'get_session_id()' function

Author: tieneupin

tests/server/test_ispyb.py

@@ -0,0 +1,42 @@
+from ispyb.sqlalchemy import BLSession, Person, Proposal
+
+from murfey.server.ispyb import get_session_id
+
+
+def test_get_session_id(
+    ispyb_session,
+):
+
+    # Create some values to put into BLSession and Proposal
+    # 'Person' is a required table
+    person_db_entry = Person(
+        login="murfey",
+    )
+    ispyb_session.add(person_db_entry)
+    ispyb_session.commit()
+
+    proposal_db_entry = Proposal(
+        personId=Person.personId,
+        proposalCode="cm",
+        proposalNumber="12345",
+    )
+    ispyb_session.add(proposal_db_entry)
+    ispyb_session.commit()
+
+    bl_session_db_entry = BLSession(
+        proposalId=proposal_db_entry.proposalId,
+        beamLineName="murfey",
+        visit_number=6,
+    )
+    ispyb_session.add(bl_session_db_entry)
+    ispyb_session.commit()
+
+    # Test function
+    result = get_session_id(
+        microscope="murfey",
+        proposal_code="cm",
+        proposal_number="12345",
+        visit_number="6",
+        db=ispyb_session,
+    )
+    assert result == bl_session_db_entry.sessionId