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import pytest
import sys
from pybind11_tests import pytypes as m
from pybind11_tests import debug_enabled
def test_list(capture, doc):
with capture:
l = m.get_list()
assert l == ["overwritten"]
l.append("value2")
m.print_list(l)
assert capture.unordered == """
Entry at position 0: value
list item 0: overwritten
list item 1: value2
"""
assert doc(m.get_list) == "get_list() -> list"
assert doc(m.print_list) == "print_list(arg0: list) -> None"
def test_set(capture, doc):
s = m.get_set()
assert s == {"key1", "key2", "key3"}
with capture:
s.add("key4")
m.print_set(s)
assert capture.unordered == """
key: key1
key: key2
key: key3
key: key4
"""
assert doc(m.get_list) == "get_list() -> list"
assert doc(m.print_list) == "print_list(arg0: list) -> None"
def test_dict(capture, doc):
d = m.get_dict()
assert d == {"key": "value"}
with capture:
d["key2"] = "value2"
m.print_dict(d)
assert capture.unordered == """
key: key, value=value
key: key2, value=value2
"""
assert doc(m.get_dict) == "get_dict() -> dict"
assert doc(m.print_dict) == "print_dict(arg0: dict) -> None"
assert m.dict_keyword_constructor() == {"x": 1, "y": 2, "z": 3}
def test_str(doc):
assert m.str_from_string().encode().decode() == "baz"
assert m.str_from_bytes().encode().decode() == "boo"
assert doc(m.str_from_bytes) == "str_from_bytes() -> str"
class A(object):
def __str__(self):
return "this is a str"
def __repr__(self):
return "this is a repr"
assert m.str_from_object(A()) == "this is a str"
assert m.repr_from_object(A()) == "this is a repr"
s1, s2 = m.str_format()
assert s1 == "1 + 2 = 3"
assert s1 == s2
def test_bytes(doc):
assert m.bytes_from_string().decode() == "foo"
assert m.bytes_from_str().decode() == "bar"
assert doc(m.bytes_from_str) == "bytes_from_str() -> {}".format(
"bytes" if sys.version_info[0] == 3 else "str"
)
def test_capsule(capture):
pytest.gc_collect()
with capture:
a = m.return_capsule_with_destructor()
del a
pytest.gc_collect()
assert capture.unordered == """
creating capsule
destructing capsule
"""
with capture:
a = m.return_capsule_with_destructor_2()
del a
pytest.gc_collect()
assert capture.unordered == """
creating capsule
destructing capsule: 1234
"""
with capture:
a = m.return_capsule_with_name_and_destructor()
del a
pytest.gc_collect()
assert capture.unordered == """
created capsule (1234, 'pointer type description')
destructing capsule (1234, 'pointer type description')
"""
def test_accessors():
class SubTestObject:
attr_obj = 1
attr_char = 2
class TestObject:
basic_attr = 1
begin_end = [1, 2, 3]
d = {"operator[object]": 1, "operator[char *]": 2}
sub = SubTestObject()
def func(self, x, *args):
return self.basic_attr + x + sum(args)
d = m.accessor_api(TestObject())
assert d["basic_attr"] == 1
assert d["begin_end"] == [1, 2, 3]
assert d["operator[object]"] == 1
assert d["operator[char *]"] == 2
assert d["attr(object)"] == 1
assert d["attr(char *)"] == 2
assert d["missing_attr_ptr"] == "raised"
assert d["missing_attr_chain"] == "raised"
assert d["is_none"] is False
assert d["operator()"] == 2
assert d["operator*"] == 7
assert d["implicit_list"] == [1, 2, 3]
assert all(x in TestObject.__dict__ for x in d["implicit_dict"])
assert m.tuple_accessor(tuple()) == (0, 1, 2)
d = m.accessor_assignment()
assert d["get"] == 0
assert d["deferred_get"] == 0
assert d["set"] == 1
assert d["deferred_set"] == 1
assert d["var"] == 99
def test_constructors():
"""C++ default and converting constructors are equivalent to type calls in Python"""
types = [str, bool, int, float, tuple, list, dict, set]
expected = {t.__name__: t() for t in types}
assert m.default_constructors() == expected
data = {
str: 42,
bool: "Not empty",
int: "42",
float: "+1e3",
tuple: range(3),
list: range(3),
dict: [("two", 2), ("one", 1), ("three", 3)],
set: [4, 4, 5, 6, 6, 6],
memoryview: b'abc'
}
inputs = {k.__name__: v for k, v in data.items()}
expected = {k.__name__: k(v) for k, v in data.items()}
assert m.converting_constructors(inputs) == expected
assert m.cast_functions(inputs) == expected
# Converting constructors and cast functions should just reference rather
# than copy when no conversion is needed:
noconv1 = m.converting_constructors(expected)
for k in noconv1:
assert noconv1[k] is expected[k]
noconv2 = m.cast_functions(expected)
for k in noconv2:
assert noconv2[k] is expected[k]
def test_implicit_casting():
"""Tests implicit casting when assigning or appending to dicts and lists."""
z = m.get_implicit_casting()
assert z['d'] == {
'char*_i1': 'abc', 'char*_i2': 'abc', 'char*_e': 'abc', 'char*_p': 'abc',
'str_i1': 'str', 'str_i2': 'str1', 'str_e': 'str2', 'str_p': 'str3',
'int_i1': 42, 'int_i2': 42, 'int_e': 43, 'int_p': 44
}
assert z['l'] == [3, 6, 9, 12, 15]
def test_print(capture):
with capture:
m.print_function()
assert capture == """
Hello, World!
1 2.0 three True -- multiple args
*args-and-a-custom-separator
no new line here -- next print
flush
py::print + str.format = this
"""
assert capture.stderr == "this goes to stderr"
with pytest.raises(RuntimeError) as excinfo:
m.print_failure()
assert str(excinfo.value) == "make_tuple(): unable to convert " + (
"argument of type 'UnregisteredType' to Python object"
if debug_enabled else
"arguments to Python object (compile in debug mode for details)"
)
def test_hash():
class Hashable(object):
def __init__(self, value):
self.value = value
def __hash__(self):
return self.value
class Unhashable(object):
__hash__ = None
assert m.hash_function(Hashable(42)) == 42
with pytest.raises(TypeError):
m.hash_function(Unhashable())
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