示例#1
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def test_countparens_empty():
    assert 0 == parens.count_parens("")
示例#2
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def test_countparens_countsOpens():
    assert 1 == parens.count_parens("(")
    assert 2 == parens.count_parens("((")
示例#3
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def test_countparens_subtractsCloseds():
    assert -1 == parens.count_parens(")")
    assert -2 == parens.count_parens("))")
    assert -1 == parens.count_parens("())")
    assert 0 == parens.count_parens("()")