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- # -*- coding: utf-8 -*-
- import pytest
- from pybind11_tests import stl as m
- from pybind11_tests import UserType
- from pybind11_tests import ConstructorStats
- def test_vector(doc):
- """std::vector <-> list"""
- lst = m.cast_vector()
- assert lst == [1]
- lst.append(2)
- assert m.load_vector(lst)
- assert m.load_vector(tuple(lst))
- assert m.cast_bool_vector() == [True, False]
- assert m.load_bool_vector([True, False])
- assert doc(m.cast_vector) == "cast_vector() -> List[int]"
- assert doc(m.load_vector) == "load_vector(arg0: List[int]) -> bool"
- # Test regression caused by 936: pointers to stl containers weren't castable
- assert m.cast_ptr_vector() == ["lvalue", "lvalue"]
- def test_deque(doc):
- """std::deque <-> list"""
- lst = m.cast_deque()
- assert lst == [1]
- lst.append(2)
- assert m.load_deque(lst)
- assert m.load_deque(tuple(lst))
- def test_array(doc):
- """std::array <-> list"""
- lst = m.cast_array()
- assert lst == [1, 2]
- assert m.load_array(lst)
- assert doc(m.cast_array) == "cast_array() -> List[int[2]]"
- assert doc(m.load_array) == "load_array(arg0: List[int[2]]) -> bool"
- def test_valarray(doc):
- """std::valarray <-> list"""
- lst = m.cast_valarray()
- assert lst == [1, 4, 9]
- assert m.load_valarray(lst)
- assert doc(m.cast_valarray) == "cast_valarray() -> List[int]"
- assert doc(m.load_valarray) == "load_valarray(arg0: List[int]) -> bool"
- def test_map(doc):
- """std::map <-> dict"""
- d = m.cast_map()
- assert d == {"key": "value"}
- assert "key" in d
- d["key2"] = "value2"
- assert "key2" in d
- assert m.load_map(d)
- assert doc(m.cast_map) == "cast_map() -> Dict[str, str]"
- assert doc(m.load_map) == "load_map(arg0: Dict[str, str]) -> bool"
- def test_set(doc):
- """std::set <-> set"""
- s = m.cast_set()
- assert s == {"key1", "key2"}
- s.add("key3")
- assert m.load_set(s)
- assert doc(m.cast_set) == "cast_set() -> Set[str]"
- assert doc(m.load_set) == "load_set(arg0: Set[str]) -> bool"
- def test_recursive_casting():
- """Tests that stl casters preserve lvalue/rvalue context for container values"""
- assert m.cast_rv_vector() == ["rvalue", "rvalue"]
- assert m.cast_lv_vector() == ["lvalue", "lvalue"]
- assert m.cast_rv_array() == ["rvalue", "rvalue", "rvalue"]
- assert m.cast_lv_array() == ["lvalue", "lvalue"]
- assert m.cast_rv_map() == {"a": "rvalue"}
- assert m.cast_lv_map() == {"a": "lvalue", "b": "lvalue"}
- assert m.cast_rv_nested() == [[[{"b": "rvalue", "c": "rvalue"}], [{"a": "rvalue"}]]]
- assert m.cast_lv_nested() == {
- "a": [[["lvalue", "lvalue"]], [["lvalue", "lvalue"]]],
- "b": [[["lvalue", "lvalue"], ["lvalue", "lvalue"]]],
- }
- # Issue #853 test case:
- z = m.cast_unique_ptr_vector()
- assert z[0].value == 7 and z[1].value == 42
- def test_move_out_container():
- """Properties use the `reference_internal` policy by default. If the underlying function
- returns an rvalue, the policy is automatically changed to `move` to avoid referencing
- a temporary. In case the return value is a container of user-defined types, the policy
- also needs to be applied to the elements, not just the container."""
- c = m.MoveOutContainer()
- moved_out_list = c.move_list
- assert [x.value for x in moved_out_list] == [0, 1, 2]
- @pytest.mark.skipif(not hasattr(m, "has_optional"), reason="no <optional>")
- def test_optional():
- assert m.double_or_zero(None) == 0
- assert m.double_or_zero(42) == 84
- pytest.raises(TypeError, m.double_or_zero, "foo")
- assert m.half_or_none(0) is None
- assert m.half_or_none(42) == 21
- pytest.raises(TypeError, m.half_or_none, "foo")
- assert m.test_nullopt() == 42
- assert m.test_nullopt(None) == 42
- assert m.test_nullopt(42) == 42
- assert m.test_nullopt(43) == 43
- assert m.test_no_assign() == 42
- assert m.test_no_assign(None) == 42
- assert m.test_no_assign(m.NoAssign(43)) == 43
- pytest.raises(TypeError, m.test_no_assign, 43)
- assert m.nodefer_none_optional(None)
- holder = m.OptionalHolder()
- mvalue = holder.member
- assert mvalue.initialized
- assert holder.member_initialized()
- @pytest.mark.skipif(
- not hasattr(m, "has_exp_optional"), reason="no <experimental/optional>"
- )
- def test_exp_optional():
- assert m.double_or_zero_exp(None) == 0
- assert m.double_or_zero_exp(42) == 84
- pytest.raises(TypeError, m.double_or_zero_exp, "foo")
- assert m.half_or_none_exp(0) is None
- assert m.half_or_none_exp(42) == 21
- pytest.raises(TypeError, m.half_or_none_exp, "foo")
- assert m.test_nullopt_exp() == 42
- assert m.test_nullopt_exp(None) == 42
- assert m.test_nullopt_exp(42) == 42
- assert m.test_nullopt_exp(43) == 43
- assert m.test_no_assign_exp() == 42
- assert m.test_no_assign_exp(None) == 42
- assert m.test_no_assign_exp(m.NoAssign(43)) == 43
- pytest.raises(TypeError, m.test_no_assign_exp, 43)
- holder = m.OptionalExpHolder()
- mvalue = holder.member
- assert mvalue.initialized
- assert holder.member_initialized()
- @pytest.mark.skipif(not hasattr(m, "load_variant"), reason="no <variant>")
- def test_variant(doc):
- assert m.load_variant(1) == "int"
- assert m.load_variant("1") == "std::string"
- assert m.load_variant(1.0) == "double"
- assert m.load_variant(None) == "std::nullptr_t"
- assert m.load_variant_2pass(1) == "int"
- assert m.load_variant_2pass(1.0) == "double"
- assert m.cast_variant() == (5, "Hello")
- assert (
- doc(m.load_variant) == "load_variant(arg0: Union[int, str, float, None]) -> str"
- )
- def test_vec_of_reference_wrapper():
- """#171: Can't return reference wrappers (or STL structures containing them)"""
- assert (
- str(m.return_vec_of_reference_wrapper(UserType(4)))
- == "[UserType(1), UserType(2), UserType(3), UserType(4)]"
- )
- def test_stl_pass_by_pointer(msg):
- """Passing nullptr or None to an STL container pointer is not expected to work"""
- with pytest.raises(TypeError) as excinfo:
- m.stl_pass_by_pointer() # default value is `nullptr`
- assert (
- msg(excinfo.value)
- == """
- stl_pass_by_pointer(): incompatible function arguments. The following argument types are supported:
- 1. (v: List[int] = None) -> List[int]
- Invoked with:
- """ # noqa: E501 line too long
- )
- with pytest.raises(TypeError) as excinfo:
- m.stl_pass_by_pointer(None)
- assert (
- msg(excinfo.value)
- == """
- stl_pass_by_pointer(): incompatible function arguments. The following argument types are supported:
- 1. (v: List[int] = None) -> List[int]
- Invoked with: None
- """ # noqa: E501 line too long
- )
- assert m.stl_pass_by_pointer([1, 2, 3]) == [1, 2, 3]
- def test_missing_header_message():
- """Trying convert `list` to a `std::vector`, or vice versa, without including
- <pybind11/stl.h> should result in a helpful suggestion in the error message"""
- import pybind11_cross_module_tests as cm
- expected_message = (
- "Did you forget to `#include <pybind11/stl.h>`? Or <pybind11/complex.h>,\n"
- "<pybind11/functional.h>, <pybind11/chrono.h>, etc. Some automatic\n"
- "conversions are optional and require extra headers to be included\n"
- "when compiling your pybind11 module."
- )
- with pytest.raises(TypeError) as excinfo:
- cm.missing_header_arg([1.0, 2.0, 3.0])
- assert expected_message in str(excinfo.value)
- with pytest.raises(TypeError) as excinfo:
- cm.missing_header_return()
- assert expected_message in str(excinfo.value)
- def test_function_with_string_and_vector_string_arg():
- """Check if a string is NOT implicitly converted to a list, which was the
- behavior before fix of issue #1258"""
- assert m.func_with_string_or_vector_string_arg_overload(("A", "B")) == 2
- assert m.func_with_string_or_vector_string_arg_overload(["A", "B"]) == 2
- assert m.func_with_string_or_vector_string_arg_overload("A") == 3
- def test_stl_ownership():
- cstats = ConstructorStats.get(m.Placeholder)
- assert cstats.alive() == 0
- r = m.test_stl_ownership()
- assert len(r) == 1
- del r
- assert cstats.alive() == 0
- def test_array_cast_sequence():
- assert m.array_cast_sequence((1, 2, 3)) == [1, 2, 3]
- def test_issue_1561():
- """ check fix for issue #1561 """
- bar = m.Issue1561Outer()
- bar.list = [m.Issue1561Inner("bar")]
- bar.list
- assert bar.list[0].data == "bar"
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