pytest ignores test file if a single test method is called from the same test file

[wohauser]

We want to execute all tests from a test file and need to execute one test from this file afterwards.
In version 7.3.1 this worked well.
Since 8.3.4 we imagine following:

Reproduction:
content of test_test.py

class  TestClass(object):
	def test_test_1(self):
		print("Test1")
	def test_test_2(self):
		print("Test2")
	def test_test_3(self):
		print("Test3")

pytest -s test_test.py test_test.py::TestClass::test_test_3

Result:
============================= test session starts ==============================
platform linux -- Python 3.9.18, pytest-8.3.4, pluggy-1.5.0
rootdir: /tmp
plugins: dependency-0.6.0, csv-3.0.0
collected 1 item

test_test.py Test3
.

============================== 1 passed in 0.02s ===============================

What we expect is like in version 7.3.1:
pytest -s test_test.py test_test.py::TestClass::test_test_3
============================= test session starts ==============================
platform linux -- Python 3.9.18, pytest-7.3.1, pluggy-1.0.0
rootdir: /mnt/hgfs/shared
plugins: dependency-0.5.1, csv-3.0.0
collected 4 items

test_test.py Test1
.Test2
.Test3
.Test3
.

============================== 4 passed in 0.05s ===============================

[RonnyPfannschmidt]

@bluetech could this be related to the directory handling

[wohauser]

An other strange behavior:

test_test_1py

class  TestClass(object):
	def test_test_4(self):
		print("Test4")

pytest -s -rsxX test_test.py::TestClass::test_test_1 test_test.py::TestClass::test_test_2 test_test.py::TestClass::test_test_3 test_test.py::TestClass::test_test_2 test_test_1.py
============================= test session starts ==============================
platform linux -- Python 3.9.18, pytest-8.3.4, pluggy-1.5.0
rootdir: /mnt/hgfs/shared
plugins: dependency-0.6.0, csv-3.0.0
collected 5 items

test_test.py Test1
.Test2
.Test3
.
test_test_1.py Test4
.

============================== 4 passed in 0.13s ===============================

We missing the 2nd Test2.
Here the same behavior as in 7.3.1

[wohauser]

We expect that the methods and files given as commandline arguments are executed as provided in comandline.

[The-Compiler]

could this be related to the directory handling

It is indeed, I was able to bisect the problem mentioned in the OP to:

commit 385796ba494e7ae65d55892d4a358b371ac7a6b6
Author: Ran Benita <[email protected]>
Date:   Fri Jun 2 16:03:39 2023 +0300

    Rework Session and Package collection

• Rework Session and Package collection  #11646
• How should package collection work? #7777

[bluetech]

Yes, this is a duplicate of the cursed issue #12083.