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Diffstat (limited to 'ext/pybind11/tests/test_pytypes.cpp')
| -rw-r--r-- | ext/pybind11/tests/test_pytypes.cpp | 272 |
1 files changed, 272 insertions, 0 deletions
diff --git a/ext/pybind11/tests/test_pytypes.cpp b/ext/pybind11/tests/test_pytypes.cpp new file mode 100644 index 000000000..a962f0ccc --- /dev/null +++ b/ext/pybind11/tests/test_pytypes.cpp @@ -0,0 +1,272 @@ +/* + tests/test_pytypes.cpp -- Python type casters + + Copyright (c) 2017 Wenzel Jakob <wenzel.jakob@epfl.ch> + + All rights reserved. Use of this source code is governed by a + BSD-style license that can be found in the LICENSE file. +*/ + +#include "pybind11_tests.h" + + +TEST_SUBMODULE(pytypes, m) { + // test_list + m.def("get_list", []() { + py::list list; + list.append("value"); + py::print("Entry at position 0:", list[0]); + list[0] = py::str("overwritten"); + return list; + }); + m.def("print_list", [](py::list list) { + int index = 0; + for (auto item : list) + py::print("list item {}: {}"_s.format(index++, item)); + }); + + // test_set + m.def("get_set", []() { + py::set set; + set.add(py::str("key1")); + set.add("key2"); + set.add(std::string("key3")); + return set; + }); + m.def("print_set", [](py::set set) { + for (auto item : set) + py::print("key:", item); + }); + + // test_dict + m.def("get_dict", []() { return py::dict("key"_a="value"); }); + m.def("print_dict", [](py::dict dict) { + for (auto item : dict) + py::print("key: {}, value={}"_s.format(item.first, item.second)); + }); + m.def("dict_keyword_constructor", []() { + auto d1 = py::dict("x"_a=1, "y"_a=2); + auto d2 = py::dict("z"_a=3, **d1); + return d2; + }); + + // test_str + m.def("str_from_string", []() { return py::str(std::string("baz")); }); + m.def("str_from_bytes", []() { return py::str(py::bytes("boo", 3)); }); + m.def("str_from_object", [](const py::object& obj) { return py::str(obj); }); + m.def("repr_from_object", [](const py::object& obj) { return py::repr(obj); }); + + m.def("str_format", []() { + auto s1 = "{} + {} = {}"_s.format(1, 2, 3); + auto s2 = "{a} + {b} = {c}"_s.format("a"_a=1, "b"_a=2, "c"_a=3); + return py::make_tuple(s1, s2); + }); + + // test_bytes + m.def("bytes_from_string", []() { return py::bytes(std::string("foo")); }); + m.def("bytes_from_str", []() { return py::bytes(py::str("bar", 3)); }); + + // test_capsule + m.def("return_capsule_with_destructor", []() { + py::print("creating capsule"); + return py::capsule([]() { + py::print("destructing capsule"); + }); + }); + + m.def("return_capsule_with_destructor_2", []() { + py::print("creating capsule"); + return py::capsule((void *) 1234, [](void *ptr) { + py::print("destructing capsule: {}"_s.format((size_t) ptr)); + }); + }); + + m.def("return_capsule_with_name_and_destructor", []() { + auto capsule = py::capsule((void *) 1234, "pointer type description", [](PyObject *ptr) { + if (ptr) { + auto name = PyCapsule_GetName(ptr); + py::print("destructing capsule ({}, '{}')"_s.format( + (size_t) PyCapsule_GetPointer(ptr, name), name + )); + } + }); + void *contents = capsule; + py::print("created capsule ({}, '{}')"_s.format((size_t) contents, capsule.name())); + return capsule; + }); + + // test_accessors + m.def("accessor_api", [](py::object o) { + auto d = py::dict(); + + d["basic_attr"] = o.attr("basic_attr"); + + auto l = py::list(); + for (const auto &item : o.attr("begin_end")) { + l.append(item); + } + d["begin_end"] = l; + + d["operator[object]"] = o.attr("d")["operator[object]"_s]; + d["operator[char *]"] = o.attr("d")["operator[char *]"]; + + d["attr(object)"] = o.attr("sub").attr("attr_obj"); + d["attr(char *)"] = o.attr("sub").attr("attr_char"); + try { + o.attr("sub").attr("missing").ptr(); + } catch (const py::error_already_set &) { + d["missing_attr_ptr"] = "raised"_s; + } + try { + o.attr("missing").attr("doesn't matter"); + } catch (const py::error_already_set &) { + d["missing_attr_chain"] = "raised"_s; + } + + d["is_none"] = o.attr("basic_attr").is_none(); + + d["operator()"] = o.attr("func")(1); + d["operator*"] = o.attr("func")(*o.attr("begin_end")); + + // Test implicit conversion + py::list implicit_list = o.attr("begin_end"); + d["implicit_list"] = implicit_list; + py::dict implicit_dict = o.attr("__dict__"); + d["implicit_dict"] = implicit_dict; + + return d; + }); + + m.def("tuple_accessor", [](py::tuple existing_t) { + try { + existing_t[0] = 1; + } catch (const py::error_already_set &) { + // --> Python system error + // Only new tuples (refcount == 1) are mutable + auto new_t = py::tuple(3); + for (size_t i = 0; i < new_t.size(); ++i) { + new_t[i] = i; + } + return new_t; + } + return py::tuple(); + }); + + m.def("accessor_assignment", []() { + auto l = py::list(1); + l[0] = 0; + + auto d = py::dict(); + d["get"] = l[0]; + auto var = l[0]; + d["deferred_get"] = var; + l[0] = 1; + d["set"] = l[0]; + var = 99; // this assignment should not overwrite l[0] + d["deferred_set"] = l[0]; + d["var"] = var; + + return d; + }); + + // test_constructors + m.def("default_constructors", []() { + return py::dict( + "str"_a=py::str(), + "bool"_a=py::bool_(), + "int"_a=py::int_(), + "float"_a=py::float_(), + "tuple"_a=py::tuple(), + "list"_a=py::list(), + "dict"_a=py::dict(), + "set"_a=py::set() + ); + }); + + m.def("converting_constructors", [](py::dict d) { + return py::dict( + "str"_a=py::str(d["str"]), + "bool"_a=py::bool_(d["bool"]), + "int"_a=py::int_(d["int"]), + "float"_a=py::float_(d["float"]), + "tuple"_a=py::tuple(d["tuple"]), + "list"_a=py::list(d["list"]), + "dict"_a=py::dict(d["dict"]), + "set"_a=py::set(d["set"]), + "memoryview"_a=py::memoryview(d["memoryview"]) + ); + }); + + m.def("cast_functions", [](py::dict d) { + // When converting between Python types, obj.cast<T>() should be the same as T(obj) + return py::dict( + "str"_a=d["str"].cast<py::str>(), + "bool"_a=d["bool"].cast<py::bool_>(), + "int"_a=d["int"].cast<py::int_>(), + "float"_a=d["float"].cast<py::float_>(), + "tuple"_a=d["tuple"].cast<py::tuple>(), + "list"_a=d["list"].cast<py::list>(), + "dict"_a=d["dict"].cast<py::dict>(), + "set"_a=d["set"].cast<py::set>(), + "memoryview"_a=d["memoryview"].cast<py::memoryview>() + ); + }); + + m.def("get_implicit_casting", []() { + py::dict d; + d["char*_i1"] = "abc"; + const char *c2 = "abc"; + d["char*_i2"] = c2; + d["char*_e"] = py::cast(c2); + d["char*_p"] = py::str(c2); + + d["int_i1"] = 42; + int i = 42; + d["int_i2"] = i; + i++; + d["int_e"] = py::cast(i); + i++; + d["int_p"] = py::int_(i); + + d["str_i1"] = std::string("str"); + std::string s2("str1"); + d["str_i2"] = s2; + s2[3] = '2'; + d["str_e"] = py::cast(s2); + s2[3] = '3'; + d["str_p"] = py::str(s2); + + py::list l(2); + l[0] = 3; + l[1] = py::cast(6); + l.append(9); + l.append(py::cast(12)); + l.append(py::int_(15)); + + return py::dict( + "d"_a=d, + "l"_a=l + ); + }); + + // test_print + m.def("print_function", []() { + py::print("Hello, World!"); + py::print(1, 2.0, "three", true, std::string("-- multiple args")); + auto args = py::make_tuple("and", "a", "custom", "separator"); + py::print("*args", *args, "sep"_a="-"); + py::print("no new line here", "end"_a=" -- "); + py::print("next print"); + + auto py_stderr = py::module::import("sys").attr("stderr"); + py::print("this goes to stderr", "file"_a=py_stderr); + + py::print("flush", "flush"_a=true); + + py::print("{a} + {b} = {c}"_s.format("a"_a="py::print", "b"_a="str.format", "c"_a="this")); + }); + + m.def("print_failure", []() { py::print(42, UnregisteredType()); }); + + m.def("hash_function", [](py::object obj) { return py::hash(obj); }); +} |