import os

import testinfra.utils.ansible_runner

testinfra_hosts = testinfra.utils.ansible_runner.AnsibleRunner(
    os.environ['MOLECULE_INVENTORY_FILE']).get_hosts('all')

# check if MongoDB is listen concrete host and port
def test_mongo_host_port(host):
    socket = host.socket("tcp://127.0.0.1:27017")
    assert socket.is_listening

# check if MongoDB is enabled and running
def test_mongo_running_and_enabled(host):
    mongo = host.service("mongod")
    assert mongo.is_running
    assert mongo.is_enabled

# check if configuration file contains the required line
def test_config_file(File):
    config_file = File('/etc/mongod.conf')
    assert config_file.contains('bindIp: 0.0.0.0')
    assert config_file.is_file


import os

import testinfra.utils.ansible_runner

testinfra_hosts = testinfra.utils.ansible_runner.AnsibleRunner(
    os.environ['MOLECULE_INVENTORY_FILE']).get_hosts('all')

# check if MongoDB is listen concrete host and port
def test_mongo_host_port(host):
    socket = host.socket("tcp://127.0.0.1:27017")
    assert socket.is_listening

# check if MongoDB is enabled and running
def test_mongo_running_and_enabled(host):
    mongo = host.service("mongod")
    assert mongo.is_running
    assert mongo.is_enabled

# check if configuration file contains the required line
def test_config_file(File):
    config_file = File('/etc/mongod.conf')
    assert config_file.is_file
    assert config_file.contains('bindIp: 0.0.0.0')
    assert config_file.contains('port: 27017')

Edit test method 'test_config_file' to check configuration network interface