Implementation of stack.

PiperOrigin-RevId: 205763219

1 files changed, 38 insertions, 0 deletions

diff --git a/tensorflow/contrib/lite/testing/generate_examples.py b/tensorflow/contrib/lite/testing/generate_examples.py
index b3ccc65e85..41ece94237 100644
--- a/tensorflow/contrib/lite/testing/generate_examples.py
+++ b/tensorflow/contrib/lite/testing/generate_examples.py
@@ -2880,6 +2880,44 @@ def make_sparse_to_dense_tests(zip_path):
   make_zip_of_tests(zip_path, test_parameters, build_graph, build_inputs)
 
 
+def make_pack_tests(zip_path):
+  """Make a set of tests to do stack."""
+
+  test_parameters = [{
+      "base_shape": [[3, 4, 3], [3, 4], [5]],
+      "num_tensors": [1, 2, 3, 4, 5, 6],
+      "axis": [0, 1, 2, 3],
+      "additional_shape": [1, 2, 3],
+  }]
+
+  def get_shape(parameters):
+    """Return a tweaked version of 'base_shape'."""
+    axis = parameters["axis"]
+    shape = parameters["base_shape"][:]
+    if axis < len(shape):
+      shape[axis] += parameters["additional_shape"]
+    return shape
+
+  def build_graph(parameters):
+    all_tensors = []
+    for n in range(0, parameters["num_tensors"]):
+      input_tensor = tf.placeholder(
+          dtype=tf.float32, name=("input%d" % n), shape=get_shape(parameters))
+      all_tensors.append(input_tensor)
+    out = tf.stack(all_tensors, parameters["axis"])
+    return all_tensors, [out]
+
+  def build_inputs(parameters, sess, inputs, outputs):
+    all_values = []
+    for _ in range(0, parameters["num_tensors"]):
+      input_values = create_tensor_data(np.float32, get_shape(parameters))
+      all_values.append(input_values)
+    return all_values, sess.run(
+        outputs, feed_dict=dict(zip(inputs, all_values)))
+
+  make_zip_of_tests(zip_path, test_parameters, build_graph, build_inputs)
+
+
 # Toco binary path provided by the generate rule.
 bin_path = None