Merge branch 'master' into sh_merge_master3

tests/conftest.py

@@ -11,11 +11,17 @@ import multiprocessing
 import os
 import re
 import textwrap
+import traceback
 
 import pytest
 
 # Early diagnostic for failed imports
-import pybind11_tests
+try:
+    import pybind11_tests
+except Exception:
+    # pytest does not show the traceback without this.
+    traceback.print_exc()
+    raise
 
 
 @pytest.fixture(scope="session", autouse=True)

tests/extra_python_package/test_files.py

@@ -143,7 +143,6 @@ def normalize_line_endings(value: bytes) -> bytes:
 
 
 def test_build_sdist(monkeypatch, tmpdir):
-
     monkeypatch.chdir(MAIN_DIR)
 
     subprocess.run(
@@ -194,7 +193,6 @@ def test_build_sdist(monkeypatch, tmpdir):
 
 
 def test_build_global_dist(monkeypatch, tmpdir):
-
     monkeypatch.chdir(MAIN_DIR)
     monkeypatch.setenv("PYBIND11_GLOBAL_SDIST", "1")
     subprocess.run(

tests/test_chrono.py

@@ -7,7 +7,6 @@ from pybind11_tests import chrono as m
 
 
 def test_chrono_system_clock():
-
     # Get the time from both c++ and datetime
     date0 = datetime.datetime.today()
     date1 = m.test_chrono1()
@@ -122,7 +121,6 @@ def test_chrono_system_clock_roundtrip_time(time1, tz, monkeypatch):
 
 
 def test_chrono_duration_roundtrip():
-
     # Get the difference between two times (a timedelta)
     date1 = datetime.datetime.today()
     date2 = datetime.datetime.today()
@@ -143,7 +141,6 @@ def test_chrono_duration_roundtrip():
 
 
 def test_chrono_duration_subtraction_equivalence():
-
     date1 = datetime.datetime.today()
     date2 = datetime.datetime.today()
 
@@ -154,7 +151,6 @@ def test_chrono_duration_subtraction_equivalence():
 
 
 def test_chrono_duration_subtraction_equivalence_date():
-
     date1 = datetime.date.today()
     date2 = datetime.date.today()
 

tests/test_class.py

@@ -185,7 +185,6 @@ def test_inheritance(msg):
 
 
 def test_inheritance_init(msg):
-
     # Single base
     class Python(m.Pet):
         def __init__(self):

tests/test_custom_type_casters.py

@@ -94,7 +94,8 @@ def test_noconvert_args(msg):
 
 def test_custom_caster_destruction():
     """Tests that returning a pointer to a type that gets converted with a custom type caster gets
-    destroyed when the function has py::return_value_policy::take_ownership policy applied."""
+    destroyed when the function has py::return_value_policy::take_ownership policy applied.
+    """
 
     cstats = m.destruction_tester_cstats()
     # This one *doesn't* have take_ownership: the pointer should be used but not destroyed:

tests/test_eigen_tensor.py

@@ -59,7 +59,6 @@ def assert_equal_tensor_ref(mat, writeable=True, modified=None):
 @pytest.mark.parametrize("m", submodules)
 @pytest.mark.parametrize("member_name", ["member", "member_view"])
 def test_reference_internal(m, member_name):
-
     if not hasattr(sys, "getrefcount"):
         pytest.skip("No reference counting")
     foo = m.CustomExample()
@@ -108,7 +107,6 @@ def test_convert_tensor_to_py(m, func_name):
 
 @pytest.mark.parametrize("m", submodules)
 def test_bad_cpp_to_python_casts(m):
-
     with pytest.raises(
         RuntimeError, match="Cannot use reference internal when there is no parent"
     ):
@@ -131,7 +129,6 @@ def test_bad_cpp_to_python_casts(m):
 
 @pytest.mark.parametrize("m", submodules)
 def test_bad_python_to_cpp_casts(m):
-
     with pytest.raises(
         TypeError, match=r"^round_trip_tensor\(\): incompatible function arguments"
     ):
@@ -194,7 +191,6 @@ def test_bad_python_to_cpp_casts(m):
 
 @pytest.mark.parametrize("m", submodules)
 def test_references_actually_refer(m):
-
     a = m.reference_tensor()
     temp = a[indices]
     a[indices] = 100
@@ -211,7 +207,6 @@ def test_references_actually_refer(m):
 
 @pytest.mark.parametrize("m", submodules)
 def test_round_trip(m):
-
     assert_equal_tensor_ref(m.round_trip_tensor(tensor_ref))
 
     with pytest.raises(TypeError, match="^Cannot cast array data from"):
@@ -260,7 +255,6 @@ def test_round_trip(m):
 
 @pytest.mark.parametrize("m", submodules)
 def test_round_trip_references_actually_refer(m):
-
     # Need to create a copy that matches the type on the C side
     copy = np.array(tensor_ref, dtype=np.float64, order=m.needed_options)
     a = m.round_trip_view_tensor(copy)

tests/test_embed/test_interpreter.cpp

@@ -184,7 +184,7 @@ TEST_CASE("Custom PyConfig") {
     py::initialize_interpreter();
 }
 
-TEST_CASE("Custom PyConfig with argv") {
+TEST_CASE("scoped_interpreter with PyConfig_InitIsolatedConfig and argv") {
     py::finalize_interpreter();
     {
         PyConfig config;
@@ -199,6 +199,26 @@ TEST_CASE("Custom PyConfig with argv") {
     }
     py::initialize_interpreter();
 }
+
+TEST_CASE("scoped_interpreter with PyConfig_InitPythonConfig and argv") {
+    py::finalize_interpreter();
+    {
+        PyConfig config;
+        PyConfig_InitPythonConfig(&config);
+
+        // `initialize_interpreter() overrides the default value for config.parse_argv (`1`) by
+        // changing it to `0`. This test exercises `scoped_interpreter` with the default config.
+        char *argv[] = {strdup("a.out"), strdup("arg1")};
+        py::scoped_interpreter argv_scope(&config, 2, argv);
+        std::free(argv[0]);
+        std::free(argv[1]);
+        auto module = py::module::import("test_interpreter");
+        auto py_widget = module.attr("DerivedWidget")("The question");
+        const auto &cpp_widget = py_widget.cast<const Widget &>();
+        REQUIRE(cpp_widget.argv0() == "arg1");
+    }
+    py::initialize_interpreter();
+}
 #endif
 
 TEST_CASE("Add program dir to path pre-PyConfig") {

tests/test_local_bindings.py

@@ -130,7 +130,8 @@ def test_stl_bind_global():
 def test_mixed_local_global():
     """Local types take precedence over globally registered types: a module with a `module_local`
     type can be registered even if the type is already registered globally.  With the module,
-    casting will go to the local type; outside the module casting goes to the global type."""
+    casting will go to the local type; outside the module casting goes to the global type.
+    """
     import pybind11_cross_module_tests as cm
 
     m.register_mixed_global()

tests/test_modules.py

@@ -107,11 +107,10 @@ def test_def_submodule_failures():
         sm_name_orig = sm.__name__
         sm.__name__ = malformed_utf8
         try:
-            with pytest.raises(Exception):
-                # Seen with Python 3.9: SystemError: nameless module
-                # But we do not want to exercise the internals of PyModule_GetName(), which could
-                # change in future versions of Python, but a bad __name__ is very likely to cause
-                # some kind of failure indefinitely.
+            # We want to assert that a bad __name__ causes some kind of failure, although we do not want to exercise
+            # the internals of PyModule_GetName(). Currently all supported Python versions raise SystemError. If that
+            # changes in future Python versions, simply add the new expected exception types here.
+            with pytest.raises(SystemError):
                 m.def_submodule(sm, b"SubSubModuleName")
         finally:
             # Clean up to ensure nothing gets upset by a module with an invalid __name__.

tests/test_operator_overloading.py

@@ -130,7 +130,6 @@ def test_nested():
 
 
 def test_overriding_eq_reset_hash():
-
     assert m.Comparable(15) is not m.Comparable(15)
     assert m.Comparable(15) == m.Comparable(15)