the-littlest-jupyterhub/tests/test_configurer.py

"""
Test configurer
"""

import os
import sys

from tljh import configurer


class MockConfigurer:
    """
    Mock a Traitlet Configurable object.

    Equivalent to the `c` in `c.JupyterHub.some_property` method of setting
    traitlet properties. If an accessed attribute doesn't exist, a new instance
    of EmtpyObject is returned. This lets us set arbitrary attributes two
    levels deep.

      >>> c = MockConfigurer()
      >>> c.FirstLevel.second_level = 'hi'
      >>> c.FirstLevel.second_level == 'hi'
      True
      >>> hasattr(c.FirstLevel, 'does_not_exist')
      False
    """

    class _EmptyObject:
        """
        Empty class for putting attributes in.
        """
        pass

    def __getattr__(self, k):
        if k not in self.__dict__:
            self.__dict__[k] = MockConfigurer._EmptyObject()
        return self.__dict__[k]


def test_mock_configurer():
    """
    Test the MockConfigurer's mocking ability
    """
    m = MockConfigurer()
    m.SomethingSomething = 'hi'
    m.FirstLevel.second_level = 'boo'

    assert m.SomethingSomething == 'hi'
    assert m.FirstLevel.second_level == 'boo'

    assert not hasattr(m.FirstLevel, 'non_existent')


def apply_mock_config(overrides):
    """
    Configure a mock configurer with given overrides.

    overrides should be a dict that matches what you parse from a config.yaml
    """
    c = MockConfigurer()
    configurer.apply_config(overrides, c)
    return c


def test_default_memory_limit():
    """
    Test default per user memory limit
    """
    c = apply_mock_config({})
    assert c.Spawner.mem_limit is None


def test_set_memory_limit():
    """
    Test setting per user memory limit
    """
    c = apply_mock_config({'limits': {'memory': '42G'}})
    assert c.Spawner.mem_limit == '42G'


def test_app_default():
    """
    Test default application with no config overrides.
    """
    c = apply_mock_config({})
    # default_url is not set, so JupyterHub will pick default.
    assert not hasattr(c.Spawner, 'default_url')


def test_app_jupyterlab():
    """
    Test setting JupyterLab as default application
    """
    c = apply_mock_config({'user_environment': {'default_app': 'jupyterlab'}})
    assert c.Spawner.default_url == '/lab'


def test_app_nteract():
    """
    Test setting nteract as default application
    """
    c = apply_mock_config({'user_environment': {'default_app': 'nteract'}})
    assert c.Spawner.default_url == '/nteract'


def test_auth_default():
    """
    Test default authentication settings with no overrides
    """
    c = apply_mock_config({})

    assert c.JupyterHub.authenticator_class == 'firstuseauthenticator.FirstUseAuthenticator'
    # Do not auto create users who haven't been manually added by default
    assert not c.FirstUseAuthenticator.create_users


def test_auth_dummy():
    """
    Test setting Dummy Authenticator & password
    """
    c = apply_mock_config({
        'auth': {
            'type': 'dummyauthenticator.DummyAuthenticator',
            'DummyAuthenticator': {
                'password': 'test'
            }
        }
    })
    assert c.JupyterHub.authenticator_class == 'dummyauthenticator.DummyAuthenticator'
    assert c.DummyAuthenticator.password == 'test'


def test_auth_firstuse():
    """
    Test setting FirstUse Authenticator options
    """
    c = apply_mock_config({
        'auth': {
            'type': 'firstuseauthenticator.FirstUseAuthenticator',
            'FirstUseAuthenticator': {
                'create_users': True
            }
        }
    })
    assert c.JupyterHub.authenticator_class == 'firstuseauthenticator.FirstUseAuthenticator'
    assert c.FirstUseAuthenticator.create_users


def test_auth_github():
    """
    Test using GitHub authenticator
    """
    c = apply_mock_config({
        'auth': {
            'type': 'oauthenticator.github.GitHubOAuthenticator',
            'GitHubOAuthenticator': {
                'client_id': 'something',
                'client_secret': 'something-else'
            }
        }
    })
    assert c.JupyterHub.authenticator_class == 'oauthenticator.github.GitHubOAuthenticator'
    assert c.GitHubOAuthenticator.client_id == 'something'
    assert c.GitHubOAuthenticator.client_secret == 'something-else'


def test_traefik_api_default():
    """
    Test default traefik api authentication settings with no overrides
    """
    c = apply_mock_config({})

    assert c.TraefikTomlProxy.traefik_api_username == 'api_admin'
    assert len(c.TraefikTomlProxy.traefik_api_password) == 0


def test_set_traefik_api():
    """
    Test setting per traefik api credentials
    """
    c = apply_mock_config({
        'traefik_api': {
            'username': 'some_user',
            'password': '1234'
        }
    })
    assert c.TraefikTomlProxy.traefik_api_username == 'some_user'
    assert c.TraefikTomlProxy.traefik_api_password == '1234'


def test_cull_service_default():
    """
    Test default cull service settings with no overrides
    """
    c = apply_mock_config({})

    cull_cmd = [
       sys.executable, '/srv/src/tljh/cull_idle_servers.py',
       '--timeout=600', '--cull-every=60', '--concurrency=5',
       '--max-age=0'
    ]
    assert c.JupyterHub.services == [{
        'name': 'cull-idle',
        'admin': True,
        'command': cull_cmd,
    }]


def test_set_cull_service():
    """
    Test setting cull service options
    """
    c = apply_mock_config({
        'services': {
            'cull': {
                'every': 10,
                'users': True,
                'max_age': 60
            }
        }
    })
    cull_cmd = [
       sys.executable, '/srv/src/tljh/cull_idle_servers.py',
       '--timeout=600', '--cull-every=10', '--concurrency=5',
       '--max-age=60', '--cull-users'
    ]
    assert c.JupyterHub.services == [{
        'name': 'cull-idle',
        'admin': True,
        'command': cull_cmd,
    }]


def test_load_secrets(tljh_dir):
    """
    Test loading secret files
    """
    with open(os.path.join(tljh_dir, 'state', 'traefik-api.secret'), 'w') as f:
        f.write("traefik-password")

    tljh_config = configurer.load_config()
    assert tljh_config['traefik_api']['password'] == "traefik-password"
    c = apply_mock_config(tljh_config)
    assert c.TraefikTomlProxy.traefik_api_password == "traefik-password"

    
def test_auth_native():
    """
    Test setting Native Authenticator
    """
    c = apply_mock_config({
        'auth': {
            'type': 'nativeauthenticator.NativeAuthenticator',
            'NativeAuthenticator': {
                'open_signup': True,
            }
        }
    })
    assert c.JupyterHub.authenticator_class == 'nativeauthenticator.NativeAuthenticator'
    assert c.NativeAuthenticator.open_signup == True