1 files changed, 43 insertions, 1 deletions
diff --git a/tensorflow/python/kernel_tests/boosted_trees/training_ops_test.py b/tensorflow/python/kernel_tests/boosted_trees/training_ops_test.py
index 13b804875e..d55240297a 100644
--- a/tensorflow/python/kernel_tests/boosted_trees/training_ops_test.py
+++ b/tensorflow/python/kernel_tests/boosted_trees/training_ops_test.py
@@ -139,6 +139,49 @@ class UpdateTreeEnsembleOpTest(test_util.TensorFlowTestCase):
       self.assertEqual(new_stamp, 1)
       self.assertProtoEquals(expected_result, tree_ensemble)
 
+  def testBiasCenteringOnEmptyEnsemble(self):
+    """Test growing with bias centering on an empty ensemble."""
+    with self.test_session() as session:
+      # Create empty ensemble.
+      tree_ensemble = boosted_trees_ops.TreeEnsemble('ensemble')
+      tree_ensemble_handle = tree_ensemble.resource_handle
+      resources.initialize_resources(resources.shared_resources()).run()
+
+      gradients = np.array([[5.]], dtype=np.float32)
+      hessians = np.array([[24.]], dtype=np.float32)
+
+      # Grow tree ensemble.
+      grow_op = boosted_trees_ops.center_bias(
+          tree_ensemble_handle,
+          mean_gradients=gradients,
+          mean_hessians=hessians,
+          l1=0.0,
+          l2=1.0
+      )
+      session.run(grow_op)
+
+      new_stamp, serialized = session.run(tree_ensemble.serialize())
+
+      tree_ensemble = boosted_trees_pb2.TreeEnsemble()
+      tree_ensemble.ParseFromString(serialized)
+
+      expected_result = """
+        trees {
+         nodes {
+            leaf {
+              scalar: -0.2
+            }
+          }
+        }
+        tree_weights: 1.0
+        tree_metadata {
+          num_layers_grown: 0
+          is_finalized: false
+        }
+      """
+      self.assertEqual(new_stamp, 1)
+      self.assertProtoEquals(expected_result, tree_ensemble)
+
   def testGrowExistingEnsembleTreeNotFinalized(self):
     """Test growing an existing ensemble with the last tree not finalized."""
     with self.test_session() as session:
@@ -666,7 +709,6 @@ class UpdateTreeEnsembleOpTest(test_util.TensorFlowTestCase):
           num_layers_attempted: 1
           last_layer_node_start: 1
           last_layer_node_end: 3
-
         }
       """, tree_ensemble_config)