def test_get_device_mapper_links_returns_first_non_none(self, m_info):
""" get_device_mapper_links returns first by sort entry in DEVLINKS."""
devlinks = [self.random_string(), self.random_string()]
m_info.return_value = {'DEVLINKS': devlinks}
devpath = self.random_string()
self.assertEqual(sorted(devlinks)[0],
block.get_device_mapper_links(devpath, first=True))
def test_get_device_mapper_links_raises_error_no_link_vals(self, m_info):
""" get_device_mapper_links raises ValueError if all links are none"""
devlinks = ['', '']
m_info.return_value = {'DEVLINKS': devlinks}
with self.assertRaises(ValueError):
block.get_device_mapper_links(self.random_string())
def test_get_device_mapper_links_raises_valueerror_no_links(self, m_info):
""" get_device_mapper_links raises ValueError if info has no links."""
m_info.return_value = {self.random_string(): self.random_string()}
with self.assertRaises(ValueError):
block.get_device_mapper_links(self.random_string())
