Added experimental C APIs to build a hard-coded stack of dataset + iterator.

PiperOrigin-RevId: 190170332

1 files changed, 66 insertions, 0 deletions

diff --git a/tensorflow/c/c_api_experimental_test.cc b/tensorflow/c/c_api_experimental_test.cc
new file mode 100644
index 0000000000..9ddd65f0c5
--- /dev/null
+++ b/tensorflow/c/c_api_experimental_test.cc
@@ -0,0 +1,66 @@
+/* Copyright 2018 The TensorFlow Authors. All Rights Reserved.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+==============================================================================*/
+
+#include "tensorflow/c/c_api_experimental.h"
+#include "tensorflow/c/c_test_util.h"
+
+namespace tensorflow {
+namespace {
+
+void TestIteratorStack() {
+  TF_Status* s = TF_NewStatus();
+  TF_Graph* graph = TF_NewGraph();
+
+  TF_Function* dataset_func = nullptr;
+
+  TF_Operation* get_next =
+      TF_MakeIteratorGetNextWithDatasets(graph, "dummy_path", &dataset_func, s);
+  ASSERT_EQ(TF_OK, TF_GetCode(s)) << TF_Message(s);
+
+  ASSERT_NE(dataset_func, nullptr);
+  TF_DeleteFunction(dataset_func);
+
+  CSession csession(graph, s);
+  ASSERT_EQ(TF_OK, TF_GetCode(s)) << TF_Message(s);
+
+  // Run the graph.
+  for (int i = 0; i < 1; ++i) {
+    csession.SetOutputs({get_next});
+    csession.Run(s);
+    ASSERT_EQ(TF_OK, TF_GetCode(s)) << TF_Message(s);
+    TF_Tensor* out = csession.output_tensor(0);
+    ASSERT_TRUE(out != nullptr);
+    EXPECT_EQ(TF_INT32, TF_TensorType(out));
+    EXPECT_EQ(0, TF_NumDims(out));  // scalar
+    ASSERT_EQ(sizeof(int32), TF_TensorByteSize(out));
+    int32* output_contents = static_cast<int32*>(TF_TensorData(out));
+    EXPECT_EQ(1, *output_contents);
+  }
+
+  // This should error out since we've exhausted the iterator.
+  csession.Run(s);
+  ASSERT_EQ(TF_OUT_OF_RANGE, TF_GetCode(s)) << TF_Message(s);
+
+  // Clean up
+  csession.CloseAndDelete(s);
+  ASSERT_EQ(TF_OK, TF_GetCode(s)) << TF_Message(s);
+  TF_DeleteGraph(graph);
+  TF_DeleteStatus(s);
+}
+
+TEST(CAPI_EXPERIMENTAL, IteratorGetNext) { TestIteratorStack(); }
+
+}  // namespace
+}  // namespace tensorflow