73 lines
2.3 KiB
Python
73 lines
2.3 KiB
Python
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class RadiusVector2D:
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MIN_COORD = -100
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MAX_COORD = 1024
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def __init__(self, x=0, y=0):
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self.__x, self.__y = 0, 0
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self.x, self.y = x, y
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def check_value(func):
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def check(cls, value) -> bool:
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return (
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isinstance(value, (int, float))
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and cls.MIN_COORD <= value <= cls.MAX_COORD
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)
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def decorator(func):
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def wrapper(self, value):
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if check(self.__class__, value):
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return func(self, value)
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return wrapper
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return decorator(func)
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@property
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def x(self):
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return self.__x
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@x.setter
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@check_value
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def x(self, value):
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self.__x = value
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@property
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def y(self):
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return self.__y
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@y.setter
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@check_value
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def y(self, value):
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self.__y = value
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def norm2(self):
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return self.x**2 + self.y**2
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r1 = RadiusVector2D()
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r2 = RadiusVector2D(1)
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r3 = RadiusVector2D(4, 5)
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assert hasattr(RadiusVector2D, "MIN_COORD") and hasattr(
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RadiusVector2D, "MAX_COORD"
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), "в классе RadiusVector2D должны присутствовать атрибуты MIN_COORD и MAX_COORD"
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assert (
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type(RadiusVector2D.x) == property and type(RadiusVector2D.y) == property
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), "в классе RadiusVector2D должны присутствовать объекты-свойства x и y"
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assert (
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r1.x == 0 and r1.y == 0 and r2.x == 1 and r2.y == 0 and r3.x == 4 and r3.y == 5
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), "свойства x и y возвращают неверные значения"
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assert RadiusVector2D.norm2(r3) == 41, "неверно вычисляется норма вектора"
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r4 = RadiusVector2D(4.5, 5.5)
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assert (
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4.4 < r4.x < 4.6 and 5.4 < r4.y < 5.6
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), "свойства x и y возвращают неверные значения"
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r5 = RadiusVector2D(-102, 2000)
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assert (
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r5.x == 0 and r5.y == 0
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), "присвоение значений, выходящих за диапазон [-100; 1024] не должно выполняться"
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r = RadiusVector2D(10, 20)
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r.x = "a"
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r.y = (1, 2)
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assert r.x == 10 and r.y == 20, "присвоение не числовых значений должно игнорироваться"
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