fix: ensure explicit empty input is correctly passed to Apify actor

Author: daveomri

src/strands_tools/apify.py

@@ -200,7 +200,7 @@ def run_actor(
             self._validate_positive(memory_mbytes, "memory_mbytes")
 
         call_kwargs: Dict[str, Any] = {
-            "run_input": run_input or {},
+            "run_input": run_input if run_input is not None else {},
             "timeout_secs": timeout_secs,
             "logger": None,  # Suppress verbose apify-client logging not useful to end users
         }

tests/test_apify.py

@@ -150,6 +150,17 @@ def test_run_actor_default_input(mock_apify_env, mock_apify_client):
     assert call_kwargs["run_input"] == {}
 
 
+def test_run_actor_explicit_empty_input(mock_apify_env, mock_apify_client):
+    """Actor run passes through an explicitly empty dict instead of treating it as falsy."""
+    empty_input: dict = {}
+    with patch("strands_tools.apify.ApifyClient", return_value=mock_apify_client):
+        result = apify_run_actor(actor_id="actor/my-scraper", run_input=empty_input)
+
+    assert result["status"] == "success"
+    call_kwargs = mock_apify_client.actor.return_value.call.call_args.kwargs
+    assert call_kwargs["run_input"] is empty_input
+
+
 def test_run_actor_with_memory(mock_apify_env, mock_apify_client):
     """Actor run passes memory_mbytes when provided."""
     with patch("strands_tools.apify.ApifyClient", return_value=mock_apify_client):