39 lines
868 B
Python
39 lines
868 B
Python
import pytest
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from bunch import MetaBunch
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class Point(MetaBunch):
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""" A point has x and y coordinates, defaulting to 0.0,
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and a color, defaulting to 'gray'—and nothing more,
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except what Python and the metaclass conspire to add,
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such as __init__ and __repr__
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"""
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x = 0.0
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y = 0.0
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color = 'gray'
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def test_init_defaults():
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p = Point()
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assert repr(p) == 'Point()'
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def test_init():
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p = Point(x=1.2, y=3.4, color='red')
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assert repr(p) == "Point(x=1.2, y=3.4, color='red')"
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def test_init_wrong_argument():
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with pytest.raises(AttributeError) as exc:
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p = Point(x=1.2, y=3.4, flavor='coffee')
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assert "no attribute 'flavor'" in str(exc.value)
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def test_slots():
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p = Point()
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with pytest.raises(AttributeError) as exc:
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p.z = 5.6
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assert "no attribute 'z'" in str(exc.value)
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