def METHOD_NAME(self, resource_group):
    col = self.create_random_name(prefix='cli', length=15)
    db_name = self.create_random_name(prefix='cli', length=15)
    # Assumption: There exists a cosmosTest rg with the account mergetest. This test only creates the database and collection
    self.kwargs.update({
        'rg' : 'cosmosTest',
        'acc': 'dbmergetest',
        'db_name': db_name,
        'col': col,
        'loc': 'eastus2'
    })
    # Create database
    self.cmd('az cosmosdb sql database create -g {rg} -a {acc} -n {db_name} --throughput 30000')       
    # Create container
    self.cmd('az cosmosdb sql container create -g {rg} -a {acc} -d {db_name} -n {col} -p /pk ').get_output_in_json()
    # update container
    self.cmd('az cosmosdb sql database throughput update -g {rg} -a {acc} -n {db_name} --throughput 3000').get_output_in_json()
    # merge
    merge_info = self.cmd('az cosmosdb sql database merge -g {rg} -a {acc} -n {db_name} ').get_output_in_json()
    print(merge_info)