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Diffstat (limited to 'ext/pybind11/tests/test_stl.py')
| -rw-r--r-- | ext/pybind11/tests/test_stl.py | 200 |
1 files changed, 200 insertions, 0 deletions
diff --git a/ext/pybind11/tests/test_stl.py b/ext/pybind11/tests/test_stl.py new file mode 100644 index 000000000..db8515e7a --- /dev/null +++ b/ext/pybind11/tests/test_stl.py @@ -0,0 +1,200 @@ +import pytest + +from pybind11_tests import stl as m +from pybind11_tests import UserType + + +def test_vector(doc): + """std::vector <-> list""" + l = m.cast_vector() + assert l == [1] + l.append(2) + assert m.load_vector(l) + assert m.load_vector(tuple(l)) + + 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_array(doc): + """std::array <-> list""" + l = m.cast_array() + assert l == [1, 2] + assert m.load_array(l) + + 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""" + l = m.cast_valarray() + assert l == [1, 4, 9] + assert m.load_valarray(l) + + 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"} + d["key2"] = "value2" + 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) + + +@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) + + +@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) |