Add validation tests to python bindings.

mojo/python/system/mojo/tests/validation_util.pyx

Index: mojo/python/system/mojo/tests/validation_util.pyx
diff --git a/mojo/python/system/mojo/tests/validation_util.pyx b/mojo/python/system/mojo/tests/validation_util.pyx
new file mode 100644
index 0000000000000000000000000000000000000000..e7bdbcdd5546650f42d931e0b79f54e1c0631ee6
--- /dev/null
+++ b/mojo/python/system/mojo/tests/validation_util.pyx
@@ -0,0 +1,35 @@
+# Copyright 2014 The Chromium Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+# distutils: language = c++
+
+from libc.stdint cimport uint8_t
+from libcpp cimport bool
+from libcpp.string cimport string
+from libcpp.vector cimport vector
+
+cdef extern from "third_party/cython/python_export.h":
+  pass
+
+cdef extern from "mojo/public/cpp/bindings/tests/validation_test_input_parser.h":
+  cdef bool ParseValidationTestInput "mojo::test::ParseValidationTestInput"(
+      string input,
+      vector[uint8_t]* data,
+      size_t* num_handles,
+      string* error_message)
+
+class Data(object):
+  def __init__(self, data, num_handles, error_message):
+    self.data = data
+    self.num_handles = num_handles
+    self.error_message = error_message
+
+def ParseData(value):
+  cdef string value_as_string = value
+  cdef vector[uint8_t] data_as_vector
+  cdef size_t num_handles
+  cdef string error_message
+  ParseValidationTestInput(
+      value, &data_as_vector, &num_handles, &error_message)
+  return Data(bytearray(data_as_vector), num_handles, error_message)