[brain tests] Burst pytest from the main file

Author: Pierre-Sassoulas

tests/brain/test_brain.py

@@ -143,34 +143,6 @@ def assert_is_valid_lock(self, inferred: Instance) -> None:
             self.assertIsInstance(next(inferred.igetattr(method)), astroid.BoundMethod)
 
 
-class PytestBrainTest(unittest.TestCase):
-    def test_pytest(self) -> None:
-        ast_node = builder.extract_node(
-            """
-        import pytest
-        pytest #@
-        """
-        )
-        module = next(ast_node.infer())
-        attrs = [
-            "deprecated_call",
-            "warns",
-            "exit",
-            "fail",
-            "skip",
-            "importorskip",
-            "xfail",
-            "mark",
-            "raises",
-            "freeze_includes",
-            "set_trace",
-            "fixture",
-            "yield_fixture",
-        ]
-        for attr in attrs:
-            self.assertIn(attr, module)
-
-
 def streams_are_fine():
     """Check if streams are being overwritten,
     for example, by pytest

tests/brain/test_exceptions.py

@@ -0,0 +1,34 @@
+# Licensed under the LGPL: https://www.gnu.org/licenses/old-licenses/lgpl-2.1.en.html
+# For details: https://github.com/PyCQA/astroid/blob/main/LICENSE
+# Copyright (c) https://github.com/PyCQA/astroid/blob/main/CONTRIBUTORS.txt
+
+from __future__ import annotations
+
+from astroid import builder
+
+
+def test_pytest() -> None:
+    ast_node = builder.extract_node(
+        """
+    import pytest
+    pytest #@
+    """
+    )
+    module = next(ast_node.infer())
+    attrs = [
+        "deprecated_call",
+        "warns",
+        "exit",
+        "fail",
+        "skip",
+        "importorskip",
+        "xfail",
+        "mark",
+        "raises",
+        "freeze_includes",
+        "set_trace",
+        "fixture",
+        "yield_fixture",
+    ]
+    for attr in attrs:
+        assert attr in module