Mock a Glue Job unit test case

Question

I am in need to mock a glue job to check if it exists for a unit test case. The following code is used for it.

class GlueJob:
    """Function mocking glue job."""
    def custom_get_glue_job(self,glue_client):
        """Test Glue Job"""
        response = glue_client.get_job(JobName="abc")
        return response

import unittest
import sys
from unittest import mock
from mock import patch
class TestGlueJobs(unittest.TestCase):
    """Function mocking glue job"""
   
    @patch.object(GlueJob, 'custom_get_glue_job',return_value=True)
    def check_glue_job_exists(self, glue_job):
        """Function printing python version."""
        session = boto3.session.Session()
        glue_client = session.client('glue', region_name='us-west-1')
        GlueJob.custom_get_glue_job(glue_client)
        print("success")

glue_job = GlueJob
TestGlueJobs().check_glue_job_exists()

I am getting the following errors:

1. No value for argument 'glue_client' in unbound method call
2. No value for argument 'glue_job' in method call

I have passed on the values for both this argument. Not sure what I am missing here.

Thanks.