def test_bound_method():
# Python code
class A(object):
def f(self, a):
return self.x + a + 1
obj = A()
obj.x = 2
m = obj.f
assert m(4) == 7
class B(A):
pass
obj = B()
obj.x = 1
m = obj.f
assert m(10) == 12 # works on subclass too
# Object model code
def f(self, a):
return self.read_attr("x") + a + 1
A = Class("A", OBJECT, {"f": f}, TYPE)
obj = Instance(A)
obj.write_attr("x", 2)
m = obj.read_attr("f")
assert m(4) == 7
B = Class("B", A, {}, TYPE)
obj = Instance(B)
obj.write_attr("x", 1)
m = obj.read_attr("f")
assert m(10) == 12
def test_read_write_field():
# Python code
class A(object):
pass
obj = A()
obj.a = 1
assert obj.a == 1
obj.b = 5
assert obj.a == 1
assert obj.b == 5
obj.a = 2
assert obj.a == 2
assert obj.b == 5
# Object model code
A = Class("A", OBJECT, {}, TYPE)
obj = Instance(A)
obj.write_attr("a", 1)
assert obj.read_attr("a") == 1
obj.write_attr("b", 5)
assert obj.read_attr("a") == 1
assert obj.read_attr("b") == 5
obj.write_attr("a", 2)
assert obj.read_attr("a") == 2
assert obj.read_attr("b") == 5
def test_bound_method():
# Python code
class A(object):
def f(self, a):
return self.x + a + 1
obj = A()
obj.x = 2
m = obj.f
assert m(4) == 7
class B(A):
pass
obj = B()
obj.x = 1
m = obj.f
assert m(10) == 12 # works on subclass too
# Object model code
def f_A(self, a):
return self.read_attr("x") + a + 1
A = Class(name="A", base_class=OBJECT, fields={"f": f_A}, metaclass=TYPE)
obj = Instance(A)
obj.write_attr("x", 2)
m = obj.read_attr("f")
assert m(4) == 7
B = Class(name="B", base_class=A, fields={}, metaclass=TYPE)
obj = Instance(B)
obj.write_attr("x", 1)
m = obj.read_attr("f")
assert m(10) == 12
def test_read_write_field():
# Python code
class A(object):
pass
obj = A()
obj.a = 1
assert obj.a == 1
obj.b = 5
assert obj.a == 1
assert obj.b == 5
obj.a = 2
assert obj.a == 2
assert obj.b == 5
# Object model code
A = Class(name="A", base_class=OBJECT, fields={}, metaclass=TYPE)
obj = Instance(A)
obj.write_attr("a", 1)
assert obj.read_attr("a") == 1
obj.write_attr("b", 5)
assert obj.read_attr("a") == 1
assert obj.read_attr("b") == 5
obj.write_attr("a", 2)
assert obj.read_attr("a") == 2
assert obj.read_attr("b") == 5
def test_bound_method():
# Python code
class A(object):
def f(self, a):
return self.x + a + 1
obj = A()
obj.x = 2
m = obj.f
assert m(4) == 7
class B(A):
pass
obj = B()
obj.x = 1
m = obj.f
assert m(10) == 12 # works on subclass too
# Object model code
def f(self, a):
return self.read_attr("x") + a + 1
A = Class("A", OBJECT, {"f": f}, TYPE)
obj = Instance(A)
obj.write_attr("x", 2)
m = obj.read_attr("f")
assert m(4) == 7
B = Class("B", A, {}, TYPE)
obj = Instance(B)
obj.write_attr("x", 1)
m = obj.read_attr("f")
assert m(10) == 12
def test_getattr():
# Python code
class A(object):
def __getattr__(self, name):
if name == "fahrenheit":
return self.celsius * 9. / 5. + 32
raise AttributeError(name)
def __setattr__(self, name, value):
if name == "fahrenheit":
self.celsius = (value - 32) * 5. / 9.
else:
# call the base implementation
object.__setattr__(self, name, value)
obj = A()
obj.celsius = 30
assert obj.fahrenheit == 86 # test __getattr__
obj.celsius = 40
assert obj.fahrenheit == 104
obj.fahrenheit = 86 # test __setattr__
assert obj.celsius == 30
assert obj.fahrenheit == 86
# Object model code
def __getattr__(self, name):
if name == "fahrenheit":
return self.read_attr("celsius") * 9. / 5. + 32
raise AttributeError(name)
def __setattr__(self, name, value):
if name == "fahrenheit":
self.write_attr("celsius", (value - 32) * 5. / 9.)
else:
# call the base implementation
OBJECT.read_attr("__setattr__")(self, name, value)
A = Class(name="A",
base_class=OBJECT,
fields={
"__getattr__": __getattr__,
"__setattr__": __setattr__
},
metaclass=TYPE)
obj = Instance(A)
obj.write_attr("celsius", 30)
assert obj.read_attr("fahrenheit") == 86 # test __getattr__
obj.write_attr("celsius", 40)
assert obj.read_attr("fahrenheit") == 104
obj.write_attr("fahrenheit", 86) # test __setattr__
assert obj.read_attr("celsius") == 30
assert obj.read_attr("fahrenheit") == 86
def test_get():
# Python code
class FahrenheitGetter(object):
def __get__(self, inst, cls):
return inst.celsius * 9. / 5. + 32
class A(object):
fahrenheit = FahrenheitGetter()
obj = A()
obj.celsius = 30
assert obj.fahrenheit == 86
# Object model code
class FahrenheitGetter(object):
def __get__(self, inst, cls):
return inst.read_attr("celsius") * 9. / 5. + 32
A = Class(name="A",
base_class=OBJECT,
fields={"fahrenheit": FahrenheitGetter()},
metaclass=TYPE)
obj = Instance(A)
obj.write_attr("celsius", 30)
assert obj.read_attr("fahrenheit") == 86
def test_get():
# Python code
class FahrenheitGetter(object):
def __get__(self, inst, cls):
return inst.celsius * 9. / 5. + 32
class A(object):
fahrenheit = FahrenheitGetter()
obj = A()
obj.celsius = 30
assert obj.fahrenheit == 86
# Object model code
class FahrenheitGetter(object):
def __get__(self, inst, cls):
return inst.read_attr("celsius") * 9. / 5. + 32
def __getattr__(self, name):
if name == "fahrenheit":
return self.read_attr("celsius") * 9. / 5. + 32
raise AttributeError(name)
A = Class("A", OBJECT, {"fahrenheit": FahrenheitGetter()}, TYPE)
obj = Instance(A)
obj.write_attr("celsius", 30)
assert obj.read_attr("fahrenheit") == 86
def test_getattr():
# Python code
class A(object):
def __getattr__(self, name):
if name == "fahrenheit":
return self.celsius * 9. / 5. + 32
raise AttributeError(name)
def __setattr__(self, name, value):
if name == "fahrenheit":
self.celsius = (value - 32) * 5. / 9.
else:
# call the base implementation
object.__setattr__(self, name, value)
obj = A()
obj.celsius = 30
assert obj.fahrenheit == 86 # test __getattr__
obj.celsius = 40
assert obj.fahrenheit == 104
obj.fahrenheit = 86 # test __setattr__
assert obj.celsius == 30
assert obj.fahrenheit == 86
# Object model code
def __getattr__(self, name):
if name == "fahrenheit":
return self.read_attr("celsius") * 9. / 5. + 32
raise AttributeError(name)
def __setattr__(self, name, value):
if name == "fahrenheit":
self.write_attr("celsius", (value - 32) * 5. / 9.)
else:
# call the base implementation
OBJECT.read_attr("__setattr__")(self, name, value)
A = Class(name="A", base_class=OBJECT,
fields={"__getattr__": __getattr__, "__setattr__": __setattr__},
metaclass=TYPE)
obj = Instance(A)
obj.write_attr("celsius", 30)
assert obj.read_attr("fahrenheit") == 86 # test __getattr__
obj.write_attr("celsius", 40)
assert obj.read_attr("fahrenheit") == 104
obj.write_attr("fahrenheit", 86) # test __setattr__
assert obj.read_attr("celsius") == 30
assert obj.read_attr("fahrenheit") == 86
def test_read_write_field():
"""
test read and write field.
:return:
"""
# TODO: a good approach to start with is to write a test to
# specify what the to-be-implemented behaviour should be.
# Python code.
class A(object):
pass
obj = A()
obj.a = 1
assert obj.a == 1
obj.b = 5
assert obj.a == 1
assert obj.b == 5
obj.a = 2
assert obj.a == 2
assert obj.b == 5
# Object model code.
A = Class(name="A", base_class=OBJECT, fields={}, metaclass=TYPE)
obj = Instance(A)
obj.write_attr("a", 1)
assert obj.read_attr("a") == 1
obj.write_attr("b", 5)
assert obj.read_attr("a") == 1
assert obj.read_attr("b") == 5
obj.write_attr("a", 2)
assert obj.read_attr("a") == 2
assert obj.read_attr("b") == 5
def test_get():
# Python code
class FahrenheitGetter(object):
def __get__(self, inst, cls):
return inst.celsius * 9. / 5. + 32
class A(object):
fahrenheit = FahrenheitGetter()
obj = A()
obj.celsius = 30
assert obj.fahrenheit == 86
# Object model code
class FahrenheitGetter(object):
def __get__(self, inst, cls):
return inst.read_attr("celsius") * 9. / 5. + 32
A = Class(name="A", base_class=OBJECT,
fields={"fahrenheit": FahrenheitGetter()},
metaclass=TYPE)
obj = Instance(A)
obj.write_attr("celsius", 30)
assert obj.read_attr("fahrenheit") == 86
