tests: add check for type casted type

Author: henryiii

tests/test_class.cpp

@@ -137,8 +137,10 @@ TEST_SUBMODULE(class_, m) {
     struct Invalid {};
 
     // test_type
-    m.def("check_type", [](bool valid) {
-        if (valid)
+    m.def("check_type", [](int category) {
+        if (category == 2)
+            return py::type<int>();
+        else if (category == 1)
             return py::type<DerivedClass1>();
         else
             return py::type<Invalid>();

tests/test_class.py

@@ -25,9 +25,18 @@ def test_instance(msg):
 
 
 def test_type():
-    assert m.check_type(True) == m.DerivedClass1
-    with pytest.raises(RuntimeError):
-        m.check_type(False)
+    assert m.check_type(1) == m.DerivedClass1
+    with pytest.raises(RuntimeError) as execinfo:
+        m.check_type(0)
+
+    assert 'pybind11::detail::get_type_info: unable to find type info' in str(execinfo.value)
+    assert 'Invalid' in str(execinfo.value)
+
+    with pytest.raises(RuntimeError) as execinfo:
+        assert m.check_type(2) == int
+
+    assert 'pybind11::detail::get_type_info: unable to find type info' in str(execinfo.value)
+    assert 'int' in str(execinfo.value)
 
 
 def test_docstrings(doc):