installer_unittest.py

#!/usr/bin/python

import unittest
import common
import installer, cartesian_config

class installer_test(unittest.TestCase):

    def setUp(self):
        self.registry = installer.InstallerRegistry()


    def test_register_get_installer(self):
        install_mode = 'custom_install_mode'
        virt_type = 'custom_virt_type'

        class CustomVirtInstaller:
            pass

        self.registry.register(install_mode, CustomVirtInstaller, virt_type)
        klass = self.registry.get_installer(install_mode, virt_type)
        self.assertTrue(klass is CustomVirtInstaller)


    def test_register_get_installer_default(self):
        install_mode = 'base_install_mode'

        class BaseVirtInstaller:
            pass

        self.registry.register(install_mode, BaseVirtInstaller)
        klass = self.registry.get_installer(install_mode,
                                            get_default_virt=True)
        self.assertTrue(klass is BaseVirtInstaller)

        klass = self.registry.get_installer(install_mode,
                                            virt=None,
                                            get_default_virt=True)
        self.assertTrue(klass is BaseVirtInstaller)


    def test_make_installer(self):
        config = """install_mode = test_install_mode
vm_type = test"""

        class Installer:
            def __init__(self, mode, name, test, params):
                pass

        installer.INSTALLER_REGISTRY.register('test_install_mode',
                                              Installer,
                                              'test')

        config_parser = cartesian_config.Parser()
        config_parser.parse_string(config)
        params = config_parser.get_dicts().next()

        instance = installer.make_installer("test_install_mode_test", params)
        self.assertTrue(isinstance(instance, Installer))


if __name__ == '__main__':
    unittest.main()