def test_class_properties(self):
"A Python class can have ObjC properties with synthesized getters and setters."
NSURL = ObjCClass('NSURL')
class URLBox(NSObject):
# takes no type: All properties are pointers
url = objc_property()
data = objc_property()
@objc_method
def getSchemeIfPresent(self):
if self.url is not None:
return self.url.scheme
return None
box = URLBox.alloc().init()
# Default property value is None
self.assertIsNone(box.url)
# Assign an object via synthesized property setter and call method that uses synthesized property getter
url = NSURL.alloc().initWithString_('https://www.google.com')
box.url = url
self.assertEqual(box.getSchemeIfPresent(), 'https')
# Assign None to dealloc property and see if method returns expected None
box.url = None
self.assertIsNone(box.getSchemeIfPresent())
# Try composing URLs using constructors
base = NSURL.URLWithString('https://pybee.org')
full = NSURL.URLWithString('contributing/', relativeToURL=base)
self.assertEqual(
"Visit %s for details" % full.absoluteURL,
"Visit https://pybee.org/contributing/ for details"
)
# ObjC type conversions are performed on property assignment.
box.data = "Jabberwock"
self.assertEqual(box.data, "Jabberwock")
Example = ObjCClass('Example')
example = Example.alloc().init()
box.data = example
self.assertEqual(box.data, example)
box.data = None
self.assertIsNone(box.data)
