1 files changed, 87 insertions, 0 deletions
diff --git a/tensorflow/python/autograph/operators/exceptions_test.py b/tensorflow/python/autograph/operators/exceptions_test.py
new file mode 100644
index 0000000000..186535d05b
--- /dev/null
+++ b/tensorflow/python/autograph/operators/exceptions_test.py
@@ -0,0 +1,87 @@
+# 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 exceptions module."""
+
+from __future__ import absolute_import
+from __future__ import division
+from __future__ import print_function
+
+from tensorflow.python.autograph.operators import exceptions
+from tensorflow.python.framework import constant_op
+from tensorflow.python.framework import errors_impl
+from tensorflow.python.platform import test
+
+
+class ExceptionsTest(test.TestCase):
+
+  def test_assert_tf_untriggered(self):
+    with self.cached_session() as sess:
+      t = exceptions.assert_stmt(
+          constant_op.constant(True), lambda: constant_op.constant('ignored'))
+      sess.run(t)
+
+  def test_assert_tf_triggered(self):
+    with self.cached_session() as sess:
+      t = exceptions.assert_stmt(
+          constant_op.constant(False),
+          lambda: constant_op.constant('test message'))
+
+      with self.assertRaisesRegexp(errors_impl.InvalidArgumentError,
+                                   'test message'):
+        sess.run(t)
+
+  def test_assert_tf_multiple_printed_values(self):
+    two_tensors = [
+        constant_op.constant('test message'),
+        constant_op.constant('another message')
+    ]
+    with self.cached_session() as sess:
+      t = exceptions.assert_stmt(
+          constant_op.constant(False), lambda: two_tensors)
+
+      with self.assertRaisesRegexp(errors_impl.InvalidArgumentError,
+                                   'test message.*another message'):
+        sess.run(t)
+
+  def test_assert_python_untriggered(self):
+    side_effect_trace = []
+
+    def expression_with_side_effects():
+      side_effect_trace.append(object())
+      return 'test message'
+
+    exceptions.assert_stmt(True, expression_with_side_effects)
+
+    self.assertListEqual(side_effect_trace, [])
+
+  def test_assert_python_triggered(self):
+    if not __debug__:
+      # Python assertions only be tested when in debug mode.
+      return
+
+    side_effect_trace = []
+    tracer = object()
+
+    def expression_with_side_effects():
+      side_effect_trace.append(tracer)
+      return 'test message'
+
+    with self.assertRaisesRegexp(AssertionError, 'test message'):
+      exceptions.assert_stmt(False, expression_with_side_effects)
+    self.assertListEqual(side_effect_trace, [tracer])
+
+
+if __name__ == '__main__':
+  test.main()