39 lines
897 B
Python
39 lines
897 B
Python
import sys
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from gaphas.state import reversible_pair, observed, _reverse
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class SList:
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def __init__(self):
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self.list = list()
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def add(self, node, before=None):
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if before:
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self.list.insert(self.list.index(before), node)
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else:
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self.list.append(node)
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add = observed(add)
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@observed
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def remove(self, node):
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self.list.remove(self.list.index(node))
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def test_adding_pair():
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"""Test adding reversible pair.
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"""
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reversible_pair(
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SList.add,
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SList.remove,
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bind1={"before": lambda self, node: self.list[self.list.index(node) + 1]},
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)
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if sys.version_info.major >= 3: # Modern Python
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assert SList.add in _reverse
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assert SList.remove in _reverse
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else: # Legacy Python
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assert SList.add.__func__ in _reverse
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assert SList.remove.__func__ in _reverse
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