def test_find_device_unknown_os():
"""
Raises a NotImplementedError if the host OS is not supported.
"""
with mock.patch("os.name", "foo"):
with pytest.raises(NotImplementedError) as ex:
circup.find_device()
assert ex.value.args[0] == 'OS "foo" not supported.'
def test_find_device_posix_missing():
"""
Simulate being on os.name == 'posix' and a call to "mount" returns no
records associated with an Adafruit device.
"""
with open("tests/mount_missing.txt", "rb") as fixture_file:
fixture = fixture_file.read()
with mock.patch("os.name", "posix"), mock.patch("circup.check_output",
return_value=fixture):
assert circup.find_device() is None
def test_find_device_posix_exists():
"""
Simulate being on os.name == 'posix' and a call to "mount" returns a
record indicating a connected device.
"""
with open("tests/mount_exists.txt", "rb") as fixture_file:
fixture = fixture_file.read()
with mock.patch("os.name", "posix"):
with mock.patch("circup.check_output", return_value=fixture):
assert circup.find_device() == "/media/ntoll/CIRCUITPY"
def test_find_device_posix_no_mount_command():
"""
When the user doesn't have administrative privileges on OSX then the mount
command isn't on their path. In which case, check circup uses the more
explicit /sbin/mount instead.
"""
with open("tests/mount_exists.txt", "rb") as fixture_file:
fixture = fixture_file.read()
mock_check = mock.MagicMock(side_effect=[FileNotFoundError, fixture])
with mock.patch("os.name", "posix"), mock.patch("circup.check_output", mock_check):
assert circup.find_device() == "/media/ntoll/CIRCUITPY"
assert mock_check.call_count == 2
assert mock_check.call_args_list[0][0][0] == "mount"
assert mock_check.call_args_list[1][0][0] == "/sbin/mount"
def test_find_device_nt_missing():
"""
Simulate being on os.name == 'nt' and a disk with a volume name 'CIRCUITPY'
does not exist for a device.
"""
mock_windll = mock.MagicMock()
mock_windll.kernel32 = mock.MagicMock()
mock_windll.kernel32.GetVolumeInformationW = mock.MagicMock()
mock_windll.kernel32.GetVolumeInformationW.return_value = None
fake_buffer = ctypes.create_unicode_buffer(1024)
with mock.patch("os.name", "nt"), mock.patch(
"os.path.exists", return_value=True
), mock.patch("ctypes.create_unicode_buffer", return_value=fake_buffer):
ctypes.windll = mock_windll
assert circup.find_device() is None
def test_find_device_nt_exists():
"""
Simulate being on os.name == 'nt' and a disk with a volume name 'CIRCUITPY'
exists indicating a connected device.
"""
mock_windll = mock.MagicMock()
mock_windll.kernel32 = mock.MagicMock()
mock_windll.kernel32.GetVolumeInformationW = mock.MagicMock()
mock_windll.kernel32.GetVolumeInformationW.return_value = None
fake_buffer = ctypes.create_unicode_buffer("CIRCUITPY")
with mock.patch("os.name", "nt"), mock.patch(
"os.path.exists", return_value=True
), mock.patch("ctypes.create_unicode_buffer", return_value=fake_buffer):
ctypes.windll = mock_windll
assert circup.find_device() == "A:\\"
