def test_write_only_parameter(self):
parameter = Parameter('foo', fset=empty_setter)
self.assertTrue(parameter.is_writable())
self.assertFalse(parameter.is_readable())
parameter.set(1).result()
with self.assertRaises(ReadAccessError) as ctx:
parameter.get().result()
self.assertEqual("parameter `foo' cannot be read", str(ctx.exception))
def test_read_only_parameter(self):
def getter():
return 0
parameter = Parameter('foo', fget=getter)
self.assertTrue(parameter.is_readable())
self.assertFalse(parameter.is_writable())
self.assertEqual(parameter.get().result(), 0)
with self.assertRaises(WriteAccessError) as ctx:
parameter.set(None).result()
self.assertEqual("parameter `foo' cannot be written",
str(ctx.exception))
