How to use rocker - 10 common examples

def test_get_rocker_version(self):
        v = get_rocker_version()
        parts = v.split('.')
        self.assertEqual(len(parts), 3)
        for p in parts:
            # Check that it can be cast to an int
            i = int(p)

def plugin_load_parser_correctly(plugin):
    """A helper function to test that the plugins at least
    register an option for their own name."""
    parser = argparse.ArgumentParser(description='test_parser')
    plugin.register_arguments(parser)
    argument_name = name_to_argument(plugin.get_name())
    for action in parser._actions:
        option_strings = getattr(action, 'option_strings', [])
        if argument_name in option_strings:
            return True
    return False

def test_name_to_argument(self):
        self.assertEqual(name_to_argument('asdf'), '--asdf')
        self.assertEqual(name_to_argument('as_df'), '--as-df')
        self.assertEqual(name_to_argument('as-df'), '--as-df')

def test_name_to_argument(self):
        self.assertEqual(name_to_argument('asdf'), '--asdf')
        self.assertEqual(name_to_argument('as_df'), '--as-df')
        self.assertEqual(name_to_argument('as-df'), '--as-df')

def test_name_to_argument(self):
        self.assertEqual(name_to_argument('asdf'), '--asdf')
        self.assertEqual(name_to_argument('as_df'), '--as-df')
        self.assertEqual(name_to_argument('as-df'), '--as-df')

def test_run_before_build(self):
        dig = DockerImageGenerator([], {}, 'ubuntu:bionic')
        self.assertEqual(dig.run('true'), 1)
        self.assertEqual(dig.build(), 0)
        self.assertEqual(dig.run('true'), 0)

def test_device(self):
        dig = DockerImageGenerator([], {}, 'ubuntu:bionic')
        self.assertEqual(dig.build(), 0)
        self.assertEqual(dig.run('true', devices=['/dev/random']), 0)
        self.assertEqual(dig.run('true', devices=['/dev/does_not_exist']), 0)

def test_return_code_multiple_extensions(self):
        plugins = list_plugins()
        desired_plugins = ['home', 'user']
        active_extensions = [e() for e in plugins.values() if e.get_name() in desired_plugins]
        dig = DockerImageGenerator(active_extensions, {}, 'ubuntu:bionic')
        self.assertEqual(dig.build(), 0)
        self.assertEqual(dig.run('true'), 0)
        self.assertEqual(dig.run('false'), 1)

def test_noexecute(self):
        dig = DockerImageGenerator([], {}, 'ubuntu:bionic')
        self.assertEqual(dig.build(), 0)
        self.assertEqual(dig.run('true', noexecute=True), 0)

def test_return_code_no_extensions(self):
        dig = DockerImageGenerator([], {}, 'ubuntu:bionic')
        self.assertEqual(dig.build(), 0)
        self.assertEqual(dig.run('true'), 0)
        self.assertEqual(dig.run('false'), 1)