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# Python < 3 needs this: coding=utf-8import pytest
from pybind11_tests import builtin_casters as mfrom pybind11_tests import UserType, IncType
def test_simple_string(): assert m.string_roundtrip("const char *") == "const char *"
def test_unicode_conversion(): """Tests unicode conversion and error reporting.""" assert m.good_utf8_string() == u"Say utf8‽ 🎂 𝐀" assert m.good_utf16_string() == u"b‽🎂𝐀z" assert m.good_utf32_string() == u"a𝐀🎂‽z" assert m.good_wchar_string() == u"a⸘𝐀z"
with pytest.raises(UnicodeDecodeError): m.bad_utf8_string()
with pytest.raises(UnicodeDecodeError): m.bad_utf16_string()
# These are provided only if they actually fail (they don't when 32-bit and under Python 2.7) if hasattr(m, "bad_utf32_string"): with pytest.raises(UnicodeDecodeError): m.bad_utf32_string() if hasattr(m, "bad_wchar_string"): with pytest.raises(UnicodeDecodeError): m.bad_wchar_string()
assert m.u8_Z() == 'Z' assert m.u8_eacute() == u'é' assert m.u16_ibang() == u'‽' assert m.u32_mathbfA() == u'𝐀' assert m.wchar_heart() == u'♥'
def test_single_char_arguments(): """Tests failures for passing invalid inputs to char-accepting functions""" def toobig_message(r): return "Character code point not in range({0:#x})".format(r) toolong_message = "Expected a character, but multi-character string found"
assert m.ord_char(u'a') == 0x61 # simple ASCII assert m.ord_char(u'é') == 0xE9 # requires 2 bytes in utf-8, but can be stuffed in a char with pytest.raises(ValueError) as excinfo: assert m.ord_char(u'Ā') == 0x100 # requires 2 bytes, doesn't fit in a char assert str(excinfo.value) == toobig_message(0x100) with pytest.raises(ValueError) as excinfo: assert m.ord_char(u'ab') assert str(excinfo.value) == toolong_message
assert m.ord_char16(u'a') == 0x61 assert m.ord_char16(u'é') == 0xE9 assert m.ord_char16(u'Ā') == 0x100 assert m.ord_char16(u'‽') == 0x203d assert m.ord_char16(u'♥') == 0x2665 with pytest.raises(ValueError) as excinfo: assert m.ord_char16(u'🎂') == 0x1F382 # requires surrogate pair assert str(excinfo.value) == toobig_message(0x10000) with pytest.raises(ValueError) as excinfo: assert m.ord_char16(u'aa') assert str(excinfo.value) == toolong_message
assert m.ord_char32(u'a') == 0x61 assert m.ord_char32(u'é') == 0xE9 assert m.ord_char32(u'Ā') == 0x100 assert m.ord_char32(u'‽') == 0x203d assert m.ord_char32(u'♥') == 0x2665 assert m.ord_char32(u'🎂') == 0x1F382 with pytest.raises(ValueError) as excinfo: assert m.ord_char32(u'aa') assert str(excinfo.value) == toolong_message
assert m.ord_wchar(u'a') == 0x61 assert m.ord_wchar(u'é') == 0xE9 assert m.ord_wchar(u'Ā') == 0x100 assert m.ord_wchar(u'‽') == 0x203d assert m.ord_wchar(u'♥') == 0x2665 if m.wchar_size == 2: with pytest.raises(ValueError) as excinfo: assert m.ord_wchar(u'🎂') == 0x1F382 # requires surrogate pair assert str(excinfo.value) == toobig_message(0x10000) else: assert m.ord_wchar(u'🎂') == 0x1F382 with pytest.raises(ValueError) as excinfo: assert m.ord_wchar(u'aa') assert str(excinfo.value) == toolong_message
def test_bytes_to_string(): """Tests the ability to pass bytes to C++ string-accepting functions. Note that this is
one-way: the only way to return bytes to Python is via the pybind11::bytes class."""
# Issue #816 import sys byte = bytes if sys.version_info[0] < 3 else str
assert m.strlen(byte("hi")) == 2 assert m.string_length(byte("world")) == 5 assert m.string_length(byte("a\x00b")) == 3 assert m.strlen(byte("a\x00b")) == 1 # C-string limitation
# passing in a utf8 encoded string should work assert m.string_length(u'💩'.encode("utf8")) == 4
@pytest.mark.skipif(not hasattr(m, "has_string_view"), reason="no <string_view>")def test_string_view(capture): """Tests support for C++17 string_view arguments and return values""" assert m.string_view_chars("Hi") == [72, 105] assert m.string_view_chars("Hi 🎂") == [72, 105, 32, 0xf0, 0x9f, 0x8e, 0x82] assert m.string_view16_chars("Hi 🎂") == [72, 105, 32, 0xd83c, 0xdf82] assert m.string_view32_chars("Hi 🎂") == [72, 105, 32, 127874]
assert m.string_view_return() == "utf8 secret 🎂" assert m.string_view16_return() == "utf16 secret 🎂" assert m.string_view32_return() == "utf32 secret 🎂"
with capture: m.string_view_print("Hi") m.string_view_print("utf8 🎂") m.string_view16_print("utf16 🎂") m.string_view32_print("utf32 🎂") assert capture == """
Hi 2 utf8 🎂 9 utf16 🎂 8 utf32 🎂 7 """
with capture: m.string_view_print("Hi, ascii") m.string_view_print("Hi, utf8 🎂") m.string_view16_print("Hi, utf16 🎂") m.string_view32_print("Hi, utf32 🎂") assert capture == """
Hi, ascii 9 Hi, utf8 🎂 13 Hi, utf16 🎂 12 Hi, utf32 🎂 11 """
def test_tuple(doc): """std::pair <-> tuple & std::tuple <-> tuple""" assert m.pair_passthrough((True, "test")) == ("test", True) assert m.tuple_passthrough((True, "test", 5)) == (5, "test", True) # Any sequence can be cast to a std::pair or std::tuple assert m.pair_passthrough([True, "test"]) == ("test", True) assert m.tuple_passthrough([True, "test", 5]) == (5, "test", True)
assert doc(m.pair_passthrough) == """
pair_passthrough(arg0: Tuple[bool, str]) -> Tuple[str, bool]
Return a pair in reversed order """
assert doc(m.tuple_passthrough) == """
tuple_passthrough(arg0: Tuple[bool, str, int]) -> Tuple[int, str, bool]
Return a triple in reversed order """
def test_builtins_cast_return_none(): """Casters produced with PYBIND11_TYPE_CASTER() should convert nullptr to None""" assert m.return_none_string() is None assert m.return_none_char() is None assert m.return_none_bool() is None assert m.return_none_int() is None assert m.return_none_float() is None
def test_none_deferred(): """None passed as various argument types should defer to other overloads""" assert not m.defer_none_cstring("abc") assert m.defer_none_cstring(None) assert not m.defer_none_custom(UserType()) assert m.defer_none_custom(None) assert m.nodefer_none_void(None)
def test_void_caster(): assert m.load_nullptr_t(None) is None assert m.cast_nullptr_t() is None
def test_reference_wrapper(): """std::reference_wrapper for builtin and user types""" assert m.refwrap_builtin(42) == 420 assert m.refwrap_usertype(UserType(42)) == 42
with pytest.raises(TypeError) as excinfo: m.refwrap_builtin(None) assert "incompatible function arguments" in str(excinfo.value)
with pytest.raises(TypeError) as excinfo: m.refwrap_usertype(None) assert "incompatible function arguments" in str(excinfo.value)
a1 = m.refwrap_list(copy=True) a2 = m.refwrap_list(copy=True) assert [x.value for x in a1] == [2, 3] assert [x.value for x in a2] == [2, 3] assert not a1[0] is a2[0] and not a1[1] is a2[1]
b1 = m.refwrap_list(copy=False) b2 = m.refwrap_list(copy=False) assert [x.value for x in b1] == [1, 2] assert [x.value for x in b2] == [1, 2] assert b1[0] is b2[0] and b1[1] is b2[1]
assert m.refwrap_iiw(IncType(5)) == 5 assert m.refwrap_call_iiw(IncType(10), m.refwrap_iiw) == [10, 10, 10, 10]
def test_complex_cast(): """std::complex casts""" assert m.complex_cast(1) == "1.0" assert m.complex_cast(2j) == "(0.0, 2.0)"
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