def test_get_image_no_docker(self):
'''get_image_command raises an exception if docker is not installed'''
def mocked_run(args, real_run=subprocess.run, **kw):
assert_equal(args[0], 'docker')
args[0] = 'dockerZZZZ'
return real_run(args, **kw)
with mock.patch('subprocess.run', side_effect=mocked_run) as run_mock:
with self.assertRaises(uut.DockerError):
uut.get_image_command('n/a')
def test__get_image_command__pulls_image_if_missing(self):
'''get_image_command pulls an image if missing'''
image = 'busybox:latest'
# First remove the image
subprocess.call(['docker', 'rmi', image])
# Now try to get the image's Command
result = uut.get_image_command(image)
# Should return a non-empty string
self.assertTrue(result)
def test__get_image_command__pulls_image_if_missing(self):
"""get_image_command pulls an image if missing"""
image = "busybox:latest"
# First remove the image
subprocess.call(["docker", "rmi", image])
# Now try to get the image's Command
result = uut.get_image_command(image)
# Should return a non-empty string
self.assertTrue(result)
def test_get_image_command_success(self):
'''get_image_command works'''
assert_true(uut.get_image_command('debian:8.2'))
def test_get_image_command_success(self):
"""get_image_command works"""
assert_true(uut.get_image_command("debian:8.2"))
def test_get_image_command_bad_image(self):
'''get_image_command raises an exception for a bad image name'''
with self.assertRaises(uut.DockerError):
uut.get_image_command('nosuchimageZZZZZZZZ')
