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How to use all_matching_regions method in hypothesis

Best Python code snippet using hypothesis

__init__.py

...75        i = self.start76        for c in s:77            i = self.transition(i, c)78        return self.is_accepting(i)79    def all_matching_regions(self, string):80        """Return all pairs ``(u, v)`` such that ``self.matches(string[u:v])``."""81        # Stack format: (k, state, indices). After reading ``k`` characters82        # starting from any i in ``indices`` the DFA would be at ``state``.83        stack = [(0, self.start, range(len(string)))]84        results = []85        while stack:86            k, state, indices = stack.pop()87            # If the state is dead, abort early - no point continuing on88            # from here where there will be no more matches.89            if self.is_dead(state):90                continue91            # If the state is accepting, then every one of these indices92            # has a matching region of length ``k`` starting from it.93            if self.is_accepting(state):...

test_dfa.py

Source: test_dfa.py

...104def test_all_matching_regions_include_all_matches(x, y, z):105    y_matcher = ConcreteDFA([{c: i + 1} for i, c in enumerate(y)] + [[]], {len(y)})106    assert y_matcher.matches(y)107    s = x + y + z108    assert (len(x), len(x) + len(y)) in y_matcher.all_matching_regions(s)109@pytest.mark.parametrize("n", [1, 10, 100, 1000])110def test_max_length_of_long_dfa(n):111    dfa = ConcreteDFA([{0: i + 1} for i in range(n)] + [{}], {n})112    assert not dfa.is_dead(dfa.start)113    assert dfa.max_length(dfa.start) == n114def test_dfa_with_cached_dead():115    dfa = ConcreteDFA([[{0: 1, 1: 2}], [], []], {2})116    assert dfa.is_dead(1)117    assert dfa.is_dead(0)118@pytest.mark.parametrize("order", itertools.permutations((0, 1, 2)))119def test_dead_nodes(order):120    dfa = ConcreteDFA([{0: 1, 1: 2}, {}, {}], {2})121    for i in order:122        assert dfa.is_dead(i) == (i == 1)...

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