1 files changed, 105 insertions, 0 deletions
diff --git a/tensorflow/python/autograph/core/errors_test.py b/tensorflow/python/autograph/core/errors_test.py
new file mode 100644
index 0000000000..0444ed7eab
--- /dev/null
+++ b/tensorflow/python/autograph/core/errors_test.py
@@ -0,0 +1,105 @@
+# 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.
+# ==============================================================================
+"""Tests for errors module."""
+
+from __future__ import absolute_import
+from __future__ import division
+from __future__ import print_function
+
+from tensorflow.python.autograph.core import errors
+from tensorflow.python.autograph.pyct import origin_info
+from tensorflow.python.framework import dtypes
+from tensorflow.python.framework import errors as tf_errors
+from tensorflow.python.ops import array_ops
+from tensorflow.python.platform import test
+from tensorflow.python.util import tf_inspect
+
+
+def zero_div():
+  x = array_ops.constant(10, dtype=dtypes.int32)
+  return x // 0
+
+
+def zero_div_caller():
+  return zero_div()
+
+
+class RuntimeErrorsTest(test.TestCase):
+
+  def fake_origin(self, function, line_offset):
+    _, lineno = tf_inspect.getsourcelines(function)
+    filename = tf_inspect.getsourcefile(function)
+    lineno += line_offset
+    loc = origin_info.LineLocation(filename, lineno)
+    origin = origin_info.OriginInfo(loc, 'test_function_name', 'test_code',
+                                    'test_comment')
+    return loc, origin
+
+  def test_improved_errors_basic(self):
+    loc, origin = self.fake_origin(zero_div, 2)
+    zero_div_caller.ag_source_map = {loc: origin}
+
+    ops = zero_div_caller()
+    with self.assertRaises(errors.TfRuntimeError) as cm:
+      with errors.improved_errors(zero_div_caller):
+        with self.test_session() as sess:
+          sess.run(ops)
+
+    for frame in cm.exception.custom_traceback:
+      _, _, function_name, _ = frame
+      self.assertNotEqual('zero_div', function_name)
+    self.assertIn(origin.as_frame(), set(cm.exception.custom_traceback))
+
+  def test_improved_errors_no_matching_lineno(self):
+    loc, origin = self.fake_origin(zero_div, -1)
+    zero_div_caller.ag_source_map = {loc: origin}
+
+    ops = zero_div_caller()
+    with self.assertRaises(errors.TfRuntimeError) as cm:
+      with errors.improved_errors(zero_div_caller):
+        with self.test_session() as sess:
+          sess.run(ops)
+
+    all_function_names = set()
+    for frame in cm.exception.custom_traceback:
+      _, _, function_name, _ = frame
+      all_function_names.add(function_name)
+      self.assertNotEqual('test_function_name', function_name)
+    self.assertIn('zero_div', all_function_names)
+
+  def test_improved_errors_failures(self):
+    loc, _ = self.fake_origin(zero_div, 2)
+    zero_div_caller.ag_source_map = {loc: 'bogus object'}
+
+    ops = zero_div_caller()
+    with self.assertRaises(tf_errors.InvalidArgumentError):
+      with errors.improved_errors(zero_div_caller):
+        with self.test_session() as sess:
+          sess.run(ops)
+
+  def test_improved_errors_validation(self):
+    with self.assertRaisesRegexp(
+        ValueError,
+        'converted_function must be the result of an autograph.to_graph call'):
+      errors.improved_errors(zero_div).__enter__()
+    with self.assertRaisesRegexp(
+        ValueError,
+        'converted_function must be the result of an autograph.to_graph call'):
+      zero_div_caller.ag_source_map = 'not a dict'
+      errors.improved_errors(zero_div_caller).__enter__()
+
+
+if __name__ == '__main__':
+  test.main()