import unittest
from model_server.session import Session

class TestGetSessionObject(unittest.TestCase):
    def setUp(self) -> None:
        pass

    def test_single_session_instance(self):
        sesh = Session()
        self.assertIs(sesh, Session(), 'Re-initializing Session class returned a new object')

        from os.path import exists
        self.assertTrue(exists(sesh.session_log), 'Session did not create a log file in the correct place')
        self.assertTrue(exists(sesh.manifest_json), 'Session did not create a manifest JSON file in the correct place')

    def test_restart_session(self):
        sesh = Session()
        logfile1 = sesh.session_log
        sesh.restart()
        logfile2 = sesh.session_log
        self.assertIsNot(logfile1, logfile2, 'Restarting session does not generate new logfile')

    def test_session_records_workflow(self):
        import json
        from model_server.workflow import WorkflowRunRecord
        sesh = Session()
        di = WorkflowRunRecord(
            model_id='test_model',
        )
        sesh.record_workflow_run(di)
        with open(sesh.manifest_json, 'r') as fh:
            do = json.load(fh)
        self.assertEqual(di.dict(), do, 'Manifest record is not correct')