Method get_instance

tests/common/environ.py:284–295

Implements lazy initialization of a singleton instance of this class. We cannot initialize the instances when this module is imported because some dependencies may not be available yet, e.g. the pytest config object. Thus we instead initialize it the first time that a test needs it.

(cls, pytest_config=None)

  @classmethod
  def get_instance(cls, pytest_config=None):
    """Implements lazy initialization of a singleton instance of this class. We cannot
    initialize the instances when this module is imported because some dependencies may
    not be available yet, e.g. the pytest config object. Thus we instead initialize it
    the first time that a test needs it."""
    if cls._instance is not None:
      return cls._instance

    assert pytest_config is not None, (
      "Initial pytest_config must be provided for singleton")
    cls._instance = cls.create_new_instance(pytest_config)
    return cls._instance

  @property
  def build_flavor(self):