Improve iterparentnodeids to consume / parts until the first :: (#8577)

* Fix issue where TestCase.setUpClass is not called for test methods with a / in its name by checking if there is ::  before the selected / or any :: after. Also added a test case for this.

* removed print statement that was added

* Change iterparentnodeids to consume / parts until the first ::. Then consider ::. Tests were changed to reflect this.

* Update changelog/8509.improvement.rst

Co-authored-by: Ran Benita <ran@unusedvar.com>

testing/test_nodes.py

@@ -18,11 +18,13 @@ from _pytest.warning_types import PytestWarning
         ("a/b/c", ["", "a", "a/b", "a/b/c"]),
         ("a/bbb/c::D", ["", "a", "a/bbb", "a/bbb/c", "a/bbb/c::D"]),
         ("a/b/c::D::eee", ["", "a", "a/b", "a/b/c", "a/b/c::D", "a/b/c::D::eee"]),
-        # :: considered only at the last component.
         ("::xx", ["", "::xx"]),
-        ("a/b/c::D/d::e", ["", "a", "a/b", "a/b/c::D", "a/b/c::D/d", "a/b/c::D/d::e"]),
+        # / only considered until first ::
+        ("a/b/c::D/d::e", ["", "a", "a/b", "a/b/c", "a/b/c::D/d", "a/b/c::D/d::e"]),
         # : alone is not a separator.
         ("a/b::D:e:f::g", ["", "a", "a/b", "a/b::D:e:f", "a/b::D:e:f::g"]),
+        # / not considered if a part of a test name
+        ("a/b::c/d::e[/test]", ["", "a", "a/b", "a/b::c/d", "a/b::c/d::e[/test]"]),
     ),
 )
 def test_iterparentnodeids(nodeid: str, expected: List[str]) -> None: