Refactor mapping symbol boundaries to shared extras

Co-authored-by: Shri Sukhani <shrisukhani@users.noreply.github.com>

Author: cursoragent

tests/test_mapping_copy_helper_import_boundary.py

@@ -3,14 +3,12 @@
 
 import pytest
 
+from tests.test_mapping_utils_import_boundary import EXPECTED_MAPPING_EXTRA_IMPORTERS
 from tests.test_tool_mapping_reader_usage import TOOLS_MODULE
 
 pytestmark = pytest.mark.architecture
 
 
-EXPECTED_COPY_HELPER_EXTRA_IMPORTERS = ("tests/test_mapping_utils.py",)
-
-
 def _imports_copy_mapping_values_by_string_keys(module_text: str) -> bool:
     module_ast = ast.parse(module_text)
     for node in module_ast.body:
@@ -37,6 +35,6 @@ def test_copy_mapping_values_by_string_keys_imports_are_centralized():
             discovered_modules.append(module_path.as_posix())
 
     expected_modules = sorted(
-        [TOOLS_MODULE.as_posix(), *EXPECTED_COPY_HELPER_EXTRA_IMPORTERS]
+        [TOOLS_MODULE.as_posix(), *EXPECTED_MAPPING_EXTRA_IMPORTERS]
     )
     assert discovered_modules == expected_modules

tests/test_mapping_read_keys_helper_import_boundary.py

@@ -3,14 +3,12 @@
 
 import pytest
 
+from tests.test_mapping_utils_import_boundary import EXPECTED_MAPPING_EXTRA_IMPORTERS
 from tests.test_tool_mapping_reader_usage import TOOLS_MODULE
 
 pytestmark = pytest.mark.architecture
 
 
-EXPECTED_READ_KEYS_HELPER_EXTRA_IMPORTERS = ("tests/test_mapping_utils.py",)
-
-
 def _imports_read_string_mapping_keys(module_text: str) -> bool:
     module_ast = ast.parse(module_text)
     for node in module_ast.body:
@@ -37,6 +35,6 @@ def test_read_string_mapping_keys_imports_are_centralized():
             discovered_modules.append(module_path.as_posix())
 
     expected_modules = sorted(
-        [TOOLS_MODULE.as_posix(), *EXPECTED_READ_KEYS_HELPER_EXTRA_IMPORTERS]
+        [TOOLS_MODULE.as_posix(), *EXPECTED_MAPPING_EXTRA_IMPORTERS]
     )
     assert discovered_modules == expected_modules