mirror of
https://github.com/pybind/pybind11.git
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196 lines
5.8 KiB
Python
196 lines
5.8 KiB
Python
# -*- coding: utf-8 -*-
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import pytest
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from pybind11_tests import sequences_and_iterators as m
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from pybind11_tests import ConstructorStats
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def isclose(a, b, rel_tol=1e-05, abs_tol=0.0):
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"""Like math.isclose() from Python 3.5"""
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return abs(a - b) <= max(rel_tol * max(abs(a), abs(b)), abs_tol)
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def allclose(a_list, b_list, rel_tol=1e-05, abs_tol=0.0):
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return all(
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isclose(a, b, rel_tol=rel_tol, abs_tol=abs_tol) for a, b in zip(a_list, b_list)
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)
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def test_generalized_iterators():
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assert list(m.IntPairs([(1, 2), (3, 4), (0, 5)]).nonzero()) == [(1, 2), (3, 4)]
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assert list(m.IntPairs([(1, 2), (2, 0), (0, 3), (4, 5)]).nonzero()) == [(1, 2)]
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assert list(m.IntPairs([(0, 3), (1, 2), (3, 4)]).nonzero()) == []
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assert list(m.IntPairs([(1, 2), (3, 4), (0, 5)]).nonzero_keys()) == [1, 3]
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assert list(m.IntPairs([(1, 2), (2, 0), (0, 3), (4, 5)]).nonzero_keys()) == [1]
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assert list(m.IntPairs([(0, 3), (1, 2), (3, 4)]).nonzero_keys()) == []
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# __next__ must continue to raise StopIteration
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it = m.IntPairs([(0, 0)]).nonzero()
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for _ in range(3):
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with pytest.raises(StopIteration):
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next(it)
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it = m.IntPairs([(0, 0)]).nonzero_keys()
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for _ in range(3):
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with pytest.raises(StopIteration):
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next(it)
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def test_sliceable():
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sliceable = m.Sliceable(100)
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assert sliceable[::] == (0, 100, 1)
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assert sliceable[10::] == (10, 100, 1)
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assert sliceable[:10:] == (0, 10, 1)
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assert sliceable[::10] == (0, 100, 10)
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assert sliceable[-10::] == (90, 100, 1)
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assert sliceable[:-10:] == (0, 90, 1)
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assert sliceable[::-10] == (99, -1, -10)
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assert sliceable[50:60:1] == (50, 60, 1)
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assert sliceable[50:60:-1] == (50, 60, -1)
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def test_sequence():
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cstats = ConstructorStats.get(m.Sequence)
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s = m.Sequence(5)
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assert cstats.values() == ["of size", "5"]
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assert "Sequence" in repr(s)
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assert len(s) == 5
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assert s[0] == 0 and s[3] == 0
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assert 12.34 not in s
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s[0], s[3] = 12.34, 56.78
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assert 12.34 in s
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assert isclose(s[0], 12.34) and isclose(s[3], 56.78)
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rev = reversed(s)
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assert cstats.values() == ["of size", "5"]
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rev2 = s[::-1]
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assert cstats.values() == ["of size", "5"]
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it = iter(m.Sequence(0))
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for _ in range(3): # __next__ must continue to raise StopIteration
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with pytest.raises(StopIteration):
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next(it)
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assert cstats.values() == ["of size", "0"]
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expected = [0, 56.78, 0, 0, 12.34]
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assert allclose(rev, expected)
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assert allclose(rev2, expected)
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assert rev == rev2
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rev[0::2] = m.Sequence([2.0, 2.0, 2.0])
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assert cstats.values() == ["of size", "3", "from std::vector"]
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assert allclose(rev, [2, 56.78, 2, 0, 2])
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assert cstats.alive() == 4
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del it
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assert cstats.alive() == 3
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del s
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assert cstats.alive() == 2
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del rev
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assert cstats.alive() == 1
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del rev2
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assert cstats.alive() == 0
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assert cstats.values() == []
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assert cstats.default_constructions == 0
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assert cstats.copy_constructions == 0
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assert cstats.move_constructions >= 1
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assert cstats.copy_assignments == 0
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assert cstats.move_assignments == 0
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def test_sequence_length():
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"""#2076: Exception raised by len(arg) should be propagated """
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class BadLen(RuntimeError):
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pass
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class SequenceLike:
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def __getitem__(self, i):
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return None
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def __len__(self):
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raise BadLen()
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with pytest.raises(BadLen):
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m.sequence_length(SequenceLike())
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assert m.sequence_length([1, 2, 3]) == 3
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assert m.sequence_length("hello") == 5
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def test_map_iterator():
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sm = m.StringMap({"hi": "bye", "black": "white"})
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assert sm["hi"] == "bye"
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assert len(sm) == 2
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assert sm["black"] == "white"
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with pytest.raises(KeyError):
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assert sm["orange"]
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sm["orange"] = "banana"
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assert sm["orange"] == "banana"
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expected = {"hi": "bye", "black": "white", "orange": "banana"}
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for k in sm:
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assert sm[k] == expected[k]
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for k, v in sm.items():
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assert v == expected[k]
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it = iter(m.StringMap({}))
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for _ in range(3): # __next__ must continue to raise StopIteration
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with pytest.raises(StopIteration):
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next(it)
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def test_python_iterator_in_cpp():
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t = (1, 2, 3)
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assert m.object_to_list(t) == [1, 2, 3]
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assert m.object_to_list(iter(t)) == [1, 2, 3]
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assert m.iterator_to_list(iter(t)) == [1, 2, 3]
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with pytest.raises(TypeError) as excinfo:
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m.object_to_list(1)
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assert "object is not iterable" in str(excinfo.value)
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with pytest.raises(TypeError) as excinfo:
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m.iterator_to_list(1)
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assert "incompatible function arguments" in str(excinfo.value)
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def bad_next_call():
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raise RuntimeError("py::iterator::advance() should propagate errors")
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with pytest.raises(RuntimeError) as excinfo:
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m.iterator_to_list(iter(bad_next_call, None))
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assert str(excinfo.value) == "py::iterator::advance() should propagate errors"
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lst = [1, None, 0, None]
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assert m.count_none(lst) == 2
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assert m.find_none(lst) is True
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assert m.count_nonzeros({"a": 0, "b": 1, "c": 2}) == 2
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r = range(5)
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assert all(m.tuple_iterator(tuple(r)))
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assert all(m.list_iterator(list(r)))
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assert all(m.sequence_iterator(r))
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def test_iterator_passthrough():
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"""#181: iterator passthrough did not compile"""
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from pybind11_tests.sequences_and_iterators import iterator_passthrough
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values = [3, 5, 7, 9, 11, 13, 15]
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assert list(iterator_passthrough(iter(values))) == values
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def test_iterator_rvp():
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"""#388: Can't make iterators via make_iterator() with different r/v policies """
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import pybind11_tests.sequences_and_iterators as m
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assert list(m.make_iterator_1()) == [1, 2, 3]
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assert list(m.make_iterator_2()) == [1, 2, 3]
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assert not isinstance(m.make_iterator_1(), type(m.make_iterator_2()))
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