Update doc for grad_accu and add validation tests for batch size

tests/test_validation.py

@@ -1,6 +1,8 @@
 """Module for testing the validation module"""
 
+import logging
 import unittest
+from typing import Optional
 
 import pytest
 
@@ -13,6 +15,12 @@ class ValidationTest(unittest.TestCase):
     Test the validation module
     """
 
+    _caplog: Optional[pytest.LogCaptureFixture] = None
+
+    @pytest.fixture(autouse=True)
+    def inject_fixtures(self, caplog):
+        self._caplog = caplog
+
     def test_load_4bit_deprecate(self):
         cfg = DictDefault(
             {
@@ -23,6 +31,17 @@ class ValidationTest(unittest.TestCase):
         with pytest.raises(ValueError):
             validate_config(cfg)
 
+    def test_batch_size_unused_warning(self):
+        cfg = DictDefault(
+            {
+                "batch_size": 32,
+            }
+        )
+
+        with self._caplog.at_level(logging.WARNING):
+            validate_config(cfg)
+            assert "batch_size is not recommended" in self._caplog.records[0].message
+
     def test_qlora(self):
         base_cfg = DictDefault(
             {