def test_runner_lazy_load_loader():
"""Use a loader factory method to lazily load a loader"""
fake_loader_factory = fudge.Fake()
fake_loader_factory.expects_call().returns('regtest')
runner = VirtstrapRunner(loader_factory=fake_loader_factory)
loader = runner.loader
runner.set_loader('regtest')
# Test the injected loader
assert runner.loader == 'regtest'
