Add tests for PageIterator in test_pagination.py

These tests improve coverage and ensure proper behavior of
`PageIterator` with rate limiting and page size adjustments.

tests/test_pagination.py

@@ -1,5 +1,5 @@
 import pytest
-from pynamodb.pagination import RateLimiter
+from pynamodb.pagination import RateLimiter, PageIterator
 
 
 class MockTime():
@@ -77,3 +77,25 @@ def test_basic_rate_limiting_large_increment():
 
  # The operation takes longer than the minimum wait, so rate limiting should have no effect
  assert mock_time.time() == 1100.0
+
+
+def test_page_iterator_with_rate_limit():
+ def mock_operation():
+ pass
+
+ args = None
+ kwargs = {'exclusive_start_key': None}
+ rate_limit = 0.1
+ page_iter = PageIterator(mock_operation, args, kwargs, rate_limit)
+ assert page_iter._rate_limiter.rate_limit == rate_limit
+
+
+def test_page_iterator_page_size_getter():
+ page_iter = PageIterator(None, None, {'limit': 10})
+ assert page_iter.page_size == 10
+
+
+def test_page_iterator_page_size_setter():
+ page_iter = PageIterator(None, None, {})
+ page_iter.page_size = 20
+ assert page_iter._kwargs['limit'] == 20