exclude subprocess mocks from coverage

Author: andrewsg

tests/unit/test_transfer_manager.py

@@ -35,9 +35,10 @@
 CHUNK_SIZE = 8
 
 
-def _validate_blob_token_in_subprocess(
+# Used in subprocesses only, so excluded from coverage
+def _validate_blob_token_in_subprocess( # pragma: no cover
  maybe_pickled_blob, method_name, path_or_file, **kwargs
-):
+): 
  assert pickle.loads(maybe_pickled_blob) == BLOB_TOKEN_STRING
  assert method_name.endswith("filename")
  assert path_or_file.startswith("file")
@@ -619,7 +620,8 @@ def download_to_file(self, *args, **kwargs):
  return "SUCCESS"
 
 
-def _validate_blob_token_in_subprocess_for_chunk(
+# Used in subprocesses only, so excluded from coverage
+def _validate_blob_token_in_subprocess_for_chunk( # pragma: no cover
  maybe_pickled_blob, filename, **kwargs
 ):
  blob = pickle.loads(maybe_pickled_blob)