1 files changed, 167 insertions, 0 deletions
diff --git a/tensorflow/contrib/autograph/converters/return_statements_test.py b/tensorflow/contrib/autograph/converters/return_statements_test.py
new file mode 100644
index 0000000000..3c7c8c8a25
--- /dev/null
+++ b/tensorflow/contrib/autograph/converters/return_statements_test.py
@@ -0,0 +1,167 @@
+# Copyright 2017 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.
+# ==============================================================================
+"""Tests for return_statements module."""
+
+from __future__ import absolute_import
+from __future__ import division
+from __future__ import print_function
+
+from tensorflow.contrib.autograph.converters import return_statements
+from tensorflow.contrib.autograph.core import converter_testing
+from tensorflow.python.framework import ops
+from tensorflow.python.platform import test
+
+
+class SingleReturnTest(converter_testing.TestCase):
+
+  def assertTransformedEquivalent(self, test_fn, *inputs):
+    ns = {'ops': ops}
+    with self.converted(test_fn, return_statements, ns) as result:
+      self.assertEqual(test_fn(*inputs), result.test_fn(*inputs))
+
+  def test_straightline(self):
+
+    def test_fn(x):
+      return x * x
+
+    self.assertTransformedEquivalent(test_fn, 2)
+
+  def test_conditional(self):
+
+    def test_fn(x):
+      if x > 0:
+        return x
+      else:
+        return x * x
+
+    self.assertTransformedEquivalent(test_fn, 2)
+    self.assertTransformedEquivalent(test_fn, -2)
+
+  def test_missing_orelse(self):
+
+    def test_fn(x):
+      if x > 0:
+        return x
+
+    node, ctx = self.prepare(test_fn, {})
+    with self.assertRaises(ValueError):
+      return_statements.transform(node, ctx)
+
+  def test_missing_orelse_recovrable(self):
+
+    def test_fn(x):
+      if x > 0:
+        return x
+      return x * x
+
+    self.assertTransformedEquivalent(test_fn, 2)
+    self.assertTransformedEquivalent(test_fn, -2)
+
+  def test_missing_branch_return_recoverable(self):
+
+    def test_fn(x):
+      if x < 0:
+        x *= x
+      else:
+        return x
+      return x
+
+    self.assertTransformedEquivalent(test_fn, 2)
+    self.assertTransformedEquivalent(test_fn, -2)
+
+  def test_conditional_nested(self):
+
+    def test_fn(x):
+      if x > 0:
+        if x < 5:
+          return x
+        else:
+          return x * x
+      else:
+        return x * x * x
+
+    self.assertTransformedEquivalent(test_fn, 2)
+    self.assertTransformedEquivalent(test_fn, -2)
+    self.assertTransformedEquivalent(test_fn, 5)
+
+  def test_context_manager(self):
+
+    def test_fn(x):
+      with ops.name_scope(''):
+        return x * x
+
+    self.assertTransformedEquivalent(test_fn, 2)
+    self.assertTransformedEquivalent(test_fn, -2)
+
+  def test_context_manager_in_conditional(self):
+
+    def test_fn(x):
+      if x > 0:
+        with ops.name_scope(''):
+          return x * x
+      else:
+        return x
+
+    self.assertTransformedEquivalent(test_fn, 2)
+    self.assertTransformedEquivalent(test_fn, -2)
+
+  def text_conditional_in_context_manager(self):
+
+    def test_fn(x):
+      with ops.name_scope(''):
+        if x > 0:
+          return x * x
+        else:
+          return x
+
+    self.assertTransformedEquivalent(test_fn, 2)
+    self.assertTransformedEquivalent(test_fn, -2)
+
+  def test_no_return(self):
+
+    def test_fn(x):
+      x *= x
+
+    self.assertTransformedEquivalent(test_fn, 2)
+
+  def test_nested_functions(self):
+
+    def test_fn(x):
+
+      def inner_fn(y):
+        if y > 0:
+          return y * y
+        else:
+          return y
+
+      return inner_fn(x)
+
+    self.assertTransformedEquivalent(test_fn, 2)
+    self.assertTransformedEquivalent(test_fn, -2)
+
+  def test_loop(self):
+
+    def test_fn(x):
+      for _ in range(10):
+        return x
+      return x
+
+    node, ctx = self.prepare(test_fn, {})
+    with self.assertRaises(ValueError):
+      return_statements.transform(node, ctx)
+
+
+if __name__ == '__main__':
+  test.main()