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# Copyright (c) 2019 Ultimaker B.V.
# Uranium is released under the terms of the LGPLv3 or higher.
import pytest
from UM.Decorators import interface
def test_interface():
def declare_interface():
@interface
class TestInterface:
def test(self):
pass
def test2(self):
pass
return TestInterface
cls = declare_interface()
assert cls is not None
def declare_subclass(cls):
class TestSubclass(cls):
def __init__(self):
super().__init__()
def test(self):
print("test")
def test2(self):
print("test2")
return TestSubclass
cls = declare_subclass(cls)
assert cls is not None
sub = cls()
assert sub is not None
def declare_bad_subclass():
@interface
class TestInterface:
def test(self):
pass
class TestSubclass(TestInterface):
pass
return TestSubclass()
with pytest.raises(NotImplementedError):
declare_bad_subclass()
def declare_good_signature():
@interface
class TestInterface:
def test(self, one, two, three = None):
pass
class TestSubclass(TestInterface):
def test(self, one, two, three = None):
pass
return TestSubclass()
sub = declare_good_signature()
assert sub is not None
def declare_bad_signature():
@interface
class TestInterface:
def test(self, one, two, three = None):
pass
class TestSubclass(TestInterface):
def test(self, one):
pass
return TestSubclass()
with pytest.raises(NotImplementedError):
declare_bad_signature()
#
# private functions should be ignored
#
def should_ignore_private_functions():
@interface
class TestInterface:
def __should_be_ignored(self):
pass
class TestSubClass(TestInterface):
pass
return TestSubClass()
sub = should_ignore_private_functions()
assert sub is not None
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