chore: Add pytests for constructing pytypes from iterable (#4138)

* Add some additional pytests

* Reorder tests

* Further reorder tests

* remove stray lines

* remove unused fixtures

Author: Skylion007

tests/test_pytypes.cpp

@@ -109,6 +109,11 @@ TEST_SUBMODULE(pytypes, m) {
     m.def("get_iterator", [] { return py::iterator(); });
     // test_iterable
     m.def("get_iterable", [] { return py::iterable(); });
+    m.def("get_frozenset_from_iterable",
+          [](const py::iterable &iter) { return py::frozenset(iter); });
+    m.def("get_list_from_iterable", [](const py::iterable &iter) { return py::list(iter); });
+    m.def("get_set_from_iterable", [](const py::iterable &iter) { return py::set(iter); });
+    m.def("get_tuple_from_iterable", [](const py::iterable &iter) { return py::tuple(iter); });
     // test_float
     m.def("get_float", [] { return py::float_(0.0f); });
     // test_list

tests/test_pytypes.py

@@ -26,6 +26,22 @@ def test_iterator(doc):
     assert doc(m.get_iterator) == "get_iterator() -> Iterator"
 
 
+@pytest.mark.parametrize(
+    "pytype, from_iter_func",
+    [
+        (frozenset, m.get_frozenset_from_iterable),
+        (list, m.get_list_from_iterable),
+        (set, m.get_set_from_iterable),
+        (tuple, m.get_tuple_from_iterable),
+    ],
+)
+def test_from_iterable(pytype, from_iter_func):
+    my_iter = iter(range(10))
+    s = from_iter_func(my_iter)
+    assert type(s) == pytype
+    assert s == pytype(range(10))
+
+
 def test_iterable(doc):
     assert doc(m.get_iterable) == "get_iterable() -> Iterable"