# Python < 3 needs this: coding=utf-8 import pytest from pybind11_tests import builtin_casters as m from 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 utf8β€½ πŸŽ‚ 𝐀" assert m.good_utf16_string() == u"bβ€½πŸŽ‚π€z" assert m.good_utf32_string() == u"aπ€πŸŽ‚β€½z" assert m.good_wchar_string() == u"aβΈ˜π€z" 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'Γ©' assert m.u16_ibang() == u'β€½' assert m.u32_mathbfA() == u'𝐀' assert m.wchar_heart() == u'β™₯' 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_lv(u'b') == 0x62 assert m.ord_char(u'Γ©') == 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'Δ€') == 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'Γ©') == 0xE9 assert m.ord_char16_lv(u'Γͺ') == 0xEA assert m.ord_char16(u'Δ€') == 0x100 assert m.ord_char16(u'β€½') == 0x203d assert m.ord_char16(u'β™₯') == 0x2665 assert m.ord_char16_lv(u'β™‘') == 0x2661 with pytest.raises(ValueError) as excinfo: assert m.ord_char16(u'πŸŽ‚') == 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'Γ©') == 0xE9 assert m.ord_char32(u'Δ€') == 0x100 assert m.ord_char32(u'β€½') == 0x203d assert m.ord_char32(u'β™₯') == 0x2665 assert m.ord_char32(u'πŸŽ‚') == 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'Γ©') == 0xE9 assert m.ord_wchar(u'Δ€') == 0x100 assert m.ord_wchar(u'β€½') == 0x203d assert m.ord_wchar(u'β™₯') == 0x2665 if m.wchar_size == 2: with pytest.raises(ValueError) as excinfo: assert m.ord_wchar(u'πŸŽ‚') == 0x1F382 # requires surrogate pair assert str(excinfo.value) == toobig_message(0x10000) else: assert m.ord_wchar(u'πŸŽ‚') == 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'πŸ’©'.encode("utf8")) == 4 @pytest.mark.skipif(not hasattr(m, "has_string_view"), reason="no ") 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 πŸŽ‚") == [72, 105, 32, 0xf0, 0x9f, 0x8e, 0x82] assert m.string_view16_chars("Hi πŸŽ‚") == [72, 105, 32, 0xd83c, 0xdf82] assert m.string_view32_chars("Hi πŸŽ‚") == [72, 105, 32, 127874] assert m.string_view_return() == "utf8 secret πŸŽ‚" assert m.string_view16_return() == "utf16 secret πŸŽ‚" assert m.string_view32_return() == "utf32 secret πŸŽ‚" with capture: m.string_view_print("Hi") m.string_view_print("utf8 πŸŽ‚") m.string_view16_print("utf16 πŸŽ‚") m.string_view32_print("utf32 πŸŽ‚") assert capture == """ Hi 2 utf8 πŸŽ‚ 9 utf16 πŸŽ‚ 8 utf32 πŸŽ‚ 7 """ with capture: m.string_view_print("Hi, ascii") m.string_view_print("Hi, utf8 πŸŽ‚") m.string_view16_print("Hi, utf16 πŸŽ‚") m.string_view32_print("Hi, utf32 πŸŽ‚") assert capture == """ Hi, ascii 9 Hi, utf8 πŸŽ‚ 13 Hi, utf16 πŸŽ‚ 12 Hi, utf32 πŸŽ‚ 11 """ def test_integer_casting(): """Issue #929 - out-of-range integer values shouldn't be accepted""" import sys assert m.i32_str(-1) == "-1" assert m.i64_str(-1) == "-1" assert m.i32_str(2000000000) == "2000000000" assert m.u32_str(2000000000) == "2000000000" if sys.version_info < (3,): assert m.i32_str(long(-1)) == "-1" # noqa: F821 undefined name 'long' assert m.i64_str(long(-1)) == "-1" # noqa: F821 undefined name 'long' assert m.i64_str(long(-999999999999)) == "-999999999999" # noqa: F821 undefined name assert m.u64_str(long(999999999999)) == "999999999999" # noqa: F821 undefined name 'long' else: assert m.i64_str(-999999999999) == "-999999999999" assert m.u64_str(999999999999) == "999999999999" with pytest.raises(TypeError) as excinfo: m.u32_str(-1) assert "incompatible function arguments" in str(excinfo.value) with pytest.raises(TypeError) as excinfo: m.u64_str(-1) assert "incompatible function arguments" in str(excinfo.value) with pytest.raises(TypeError) as excinfo: m.i32_str(-3000000000) assert "incompatible function arguments" in str(excinfo.value) with pytest.raises(TypeError) as excinfo: m.i32_str(3000000000) assert "incompatible function arguments" in str(excinfo.value) if sys.version_info < (3,): with pytest.raises(TypeError) as excinfo: m.u32_str(long(-1)) # noqa: F821 undefined name 'long' assert "incompatible function arguments" in str(excinfo.value) with pytest.raises(TypeError) as excinfo: m.u64_str(long(-1)) # noqa: F821 undefined name 'long' assert "incompatible function arguments" in str(excinfo.value) 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 m.empty_tuple() == () 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 """ assert m.rvalue_pair() == ("rvalue", "rvalue") assert m.lvalue_pair() == ("lvalue", "lvalue") assert m.rvalue_tuple() == ("rvalue", "rvalue", "rvalue") assert m.lvalue_tuple() == ("lvalue", "lvalue", "lvalue") assert m.rvalue_nested() == ("rvalue", ("rvalue", ("rvalue", "rvalue"))) assert m.lvalue_nested() == ("lvalue", ("lvalue", ("lvalue", "lvalue"))) 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)" def test_bool_caster(): """Test bool caster implicit conversions.""" convert, noconvert = m.bool_passthrough, m.bool_passthrough_noconvert def require_implicit(v): pytest.raises(TypeError, noconvert, v) def cant_convert(v): pytest.raises(TypeError, convert, v) # straight up bool assert convert(True) is True assert convert(False) is False assert noconvert(True) is True assert noconvert(False) is False # None requires implicit conversion require_implicit(None) assert convert(None) is False class A(object): def __init__(self, x): self.x = x def __nonzero__(self): return self.x def __bool__(self): return self.x class B(object): pass # Arbitrary objects are not accepted cant_convert(object()) cant_convert(B()) # Objects with __nonzero__ / __bool__ defined can be converted require_implicit(A(True)) assert convert(A(True)) is True assert convert(A(False)) is False @pytest.requires_numpy def test_numpy_bool(): import numpy as np convert, noconvert = m.bool_passthrough, m.bool_passthrough_noconvert # np.bool_ is not considered implicit assert convert(np.bool_(True)) is True assert convert(np.bool_(False)) is False assert noconvert(np.bool_(True)) is True assert noconvert(np.bool_(False)) is False def test_int_long(): """In Python 2, a C++ int should return a Python int rather than long if possible: longs are not always accepted where ints are used (such as the argument to sys.exit()). A C++ long long is always a Python long.""" import sys must_be_long = type(getattr(sys, 'maxint', 1) + 1) assert isinstance(m.int_cast(), int) assert isinstance(m.long_cast(), int) assert isinstance(m.longlong_cast(), must_be_long) def test_void_caster_2(): assert m.test_void_caster()