tests/functional2: do not copy testlib tests to internal environment

When testing specific internal functionallity while needing things from
the testlib, so far, the tests for the testlib have always been copied
too.
To reduce the amount of additional program required when later making
the env of the pytest_command declarative, and to not test the same
tests a multitude of times (and potentially reaching infinite recursion)
those tests will no longer be copied

Change-Id: I36ec3824a21ed30f9b8ff19948031d1edbf6c76c

tests/functional2/testlib/fixtures/file_helper.py

@@ -2,6 +2,7 @@ import shutil
 from abc import ABC, abstractmethod
 from pathlib import Path
 from typing import Any
+from collections.abc import Callable, Iterable
 
 import pytest
 
@@ -67,16 +68,19 @@ class CopyFile(Fileish):
 
 
 class CopyTree(Fileish):
-    def __init__(self, tree_base: str | Path):
+    def __init__(
+        self, tree_base: str | Path, ignore: Callable[[str, list[str]], Iterable[str]] | None = None
+    ):
         """
         Declares a folder as a copy of an existing folder
         :param tree_base: base folder of the tree being copied
         """
         self.tree_base = tree_base
+        self.ignore = ignore
 
     def copy_to(self, path: Path, origin: Path):
         orig = self.tree_base if isinstance(self.tree_base, Path) else origin / self.tree_base
-        shutil.copytree(orig, path, dirs_exist_ok=True)
+        shutil.copytree(orig, path, dirs_exist_ok=True, ignore=self.ignore)
 
 
 class CopyTemplate(_ByContentFileish):

tests/functional2/testlib/utils.py

@@ -55,16 +55,22 @@ def get_functional2_files(additional_files: FileDeclaration | None = None) -> Fi
 
 
 def get_functional2_files_with_testlib(
-    additional_files: FileDeclaration | None = None,
+    additional_files: FileDeclaration | None = None, no_tests: bool = True
 ) -> FileDeclaration:
     if additional_files is None:
         additional_files = {}
+    if no_tests:
+
+        def ignore(_: Any, names: list[str]) -> list[str]:
+            return [name for name in names if name.startswith("test_")]
+    else:
+        ignore = None
     return get_functional2_files(
         merge_file_declaration(
             {
                 "functional2": {
                     "conftest.py": CopyFile(functional2_base_folder / "conftest.py"),
-                    "testlib": CopyTree(functional2_base_folder / "testlib"),
+                    "testlib": CopyTree(functional2_base_folder / "testlib", ignore=ignore),
                 }
             },
             additional_files,