message: TF Keras sequence_test additional test cases covers
  1- remove_long_seq api test case
diff: @@ -97,6 +97,14 @@ class TestSequence(test.TestCase):
  for l in labels:
  self.assertEqual(len(l), 2)
  + def test_remove_long_seq(self):
  + a = [[[1, 1]], [[2, 1], [2, 2]], [[3, 1], [3, 2], [3, 3]]]
  +
  + new_seq, new_label = keras.preprocessing.sequence._remove_long_seq(
  + maxlen=3, seq=a, label=['a', 'b', ['c', 'd']])
  + self.assertEqual(new_seq, [[[1, 1]], [[2, 1], [2, 2]]])
  + self.assertEqual(new_label, ['a', 'b'])
  +
  def test_TimeseriesGenerator(self):
  data = np.array([[i] for i in range(50)])
  targets = np.array([[i] for i in range(50)])
  