Add test for crash file and add a class attribute for pylinter

pylint/lint/pylinter.py

@@ -11,6 +11,8 @@
 import traceback
 import warnings
 from io import TextIOWrapper
+from pathlib import Path
+from typing import Union
 
 import astroid
 from astroid import AstroidError
@@ -170,6 +172,7 @@ class PyLinter(
     priority = 0
     level = 0
     msgs = MSGS
+    crash_file_prefix: Union[str, Path] = "pylint-crash-"
 
     @staticmethod
     def make_options():
@@ -965,7 +968,6 @@ def check(self, files_or_modules):
 
         files_or_modules is either a string or list of strings presenting modules to check.
         """
-
         self.initialize()
 
         if not isinstance(files_or_modules, (list, tuple)):
@@ -1027,7 +1029,7 @@ def _check_files(self, get_ast, file_descrs):
                 except Exception as ex:  # pylint: disable=broad-except
                     error = ex
                     template_path = prepare_crash_report(
-                        error, filepath, "pylint-crash-"
+                        error, filepath, self.crash_file_prefix
                     )
                 if error is not None:
                     msg = get_fatal_error_message(filepath, template_path)

tests/lint/test_pylinter.py

@@ -0,0 +1,25 @@
+from unittest.mock import patch
+
+from astroid import AstroidBuildingError
+
+from pylint.utils import FileState
+
+
+def raise_exception(*args, **kwargs):
+    raise AstroidBuildingError(modname="spam")
+
+
+@patch.object(FileState, "iter_spurious_suppression_messages", raise_exception)
+def test_crash_in_file(linter, capsys, tmpdir):
+    args = linter.load_command_line_configuration([__file__])
+    linter.crash_file_prefix = tmpdir / "pylint-crash-"
+    linter.check(args)
+    out, err = capsys.readouterr()
+    assert not out
+    assert not err
+    files = tmpdir.listdir()
+    assert len(files) == 1
+    assert "pylint-crash" in str(files[0])
+    with open(files[0], encoding="utf8") as f:
+        content = f.read()
+    assert "Failed to import module spam." in content