Add pybind11 2.5 source

1 files changed, 136 insertions, 0 deletions

diff --git a/3rdparty/pybind11/tests/test_callbacks.py b/3rdparty/pybind11/tests/test_callbacks.py
new file mode 100644
index 00000000..6439c8e7
--- /dev/null
+++ b/3rdparty/pybind11/tests/test_callbacks.py
@@ -0,0 +1,136 @@
+import pytest
+from pybind11_tests import callbacks as m
+from threading import Thread
+
+
+def test_callbacks():
+    from functools import partial
+
+    def func1():
+        return "func1"
+
+    def func2(a, b, c, d):
+        return "func2", a, b, c, d
+
+    def func3(a):
+        return "func3({})".format(a)
+
+    assert m.test_callback1(func1) == "func1"
+    assert m.test_callback2(func2) == ("func2", "Hello", "x", True, 5)
+    assert m.test_callback1(partial(func2, 1, 2, 3, 4)) == ("func2", 1, 2, 3, 4)
+    assert m.test_callback1(partial(func3, "partial")) == "func3(partial)"
+    assert m.test_callback3(lambda i: i + 1) == "func(43) = 44"
+
+    f = m.test_callback4()
+    assert f(43) == 44
+    f = m.test_callback5()
+    assert f(number=43) == 44
+
+
+def test_bound_method_callback():
+    # Bound Python method:
+    class MyClass:
+        def double(self, val):
+            return 2 * val
+
+    z = MyClass()
+    assert m.test_callback3(z.double) == "func(43) = 86"
+
+    z = m.CppBoundMethodTest()
+    assert m.test_callback3(z.triple) == "func(43) = 129"
+
+
+def test_keyword_args_and_generalized_unpacking():
+
+    def f(*args, **kwargs):
+        return args, kwargs
+
+    assert m.test_tuple_unpacking(f) == (("positional", 1, 2, 3, 4, 5, 6), {})
+    assert m.test_dict_unpacking(f) == (("positional", 1), {"key": "value", "a": 1, "b": 2})
+    assert m.test_keyword_args(f) == ((), {"x": 10, "y": 20})
+    assert m.test_unpacking_and_keywords1(f) == ((1, 2), {"c": 3, "d": 4})
+    assert m.test_unpacking_and_keywords2(f) == (
+        ("positional", 1, 2, 3, 4, 5),
+        {"key": "value", "a": 1, "b": 2, "c": 3, "d": 4, "e": 5}
+    )
+
+    with pytest.raises(TypeError) as excinfo:
+        m.test_unpacking_error1(f)
+    assert "Got multiple values for keyword argument" in str(excinfo.value)
+
+    with pytest.raises(TypeError) as excinfo:
+        m.test_unpacking_error2(f)
+    assert "Got multiple values for keyword argument" in str(excinfo.value)
+
+    with pytest.raises(RuntimeError) as excinfo:
+        m.test_arg_conversion_error1(f)
+    assert "Unable to convert call argument" in str(excinfo.value)
+
+    with pytest.raises(RuntimeError) as excinfo:
+        m.test_arg_conversion_error2(f)
+    assert "Unable to convert call argument" in str(excinfo.value)
+
+
+def test_lambda_closure_cleanup():
+    m.test_cleanup()
+    cstats = m.payload_cstats()
+    assert cstats.alive() == 0
+    assert cstats.copy_constructions == 1
+    assert cstats.move_constructions >= 1
+
+
+def test_cpp_function_roundtrip():
+    """Test if passing a function pointer from C++ -> Python -> C++ yields the original pointer"""
+
+    assert m.test_dummy_function(m.dummy_function) == "matches dummy_function: eval(1) = 2"
+    assert (m.test_dummy_function(m.roundtrip(m.dummy_function)) ==
+            "matches dummy_function: eval(1) = 2")
+    assert m.roundtrip(None, expect_none=True) is None
+    assert (m.test_dummy_function(lambda x: x + 2) ==
+            "can't convert to function pointer: eval(1) = 3")
+
+    with pytest.raises(TypeError) as excinfo:
+        m.test_dummy_function(m.dummy_function2)
+    assert "incompatible function arguments" in str(excinfo.value)
+
+    with pytest.raises(TypeError) as excinfo:
+        m.test_dummy_function(lambda x, y: x + y)
+    assert any(s in str(excinfo.value) for s in ("missing 1 required positional argument",
+                                                 "takes exactly 2 arguments"))
+
+
+def test_function_signatures(doc):
+    assert doc(m.test_callback3) == "test_callback3(arg0: Callable[[int], int]) -> str"
+    assert doc(m.test_callback4) == "test_callback4() -> Callable[[int], int]"
+
+
+def test_movable_object():
+    assert m.callback_with_movable(lambda _: None) is True
+
+
+def test_async_callbacks():
+    # serves as state for async callback
+    class Item:
+        def __init__(self, value):
+            self.value = value
+
+    res = []
+
+    # generate stateful lambda that will store result in `res`
+    def gen_f():
+        s = Item(3)
+        return lambda j: res.append(s.value + j)
+
+    # do some work async
+    work = [1, 2, 3, 4]
+    m.test_async_callback(gen_f(), work)
+    # wait until work is done
+    from time import sleep
+    sleep(0.5)
+    assert sum(res) == sum([x + 3 for x in work])
+
+
+def test_async_async_callbacks():
+    t = Thread(target=test_async_callbacks)
+    t.start()
+    t.join()