Add experimental framework token generation tool

tools/origin_trials/generate_token_unittest.py

Index: tools/origin_trials/generate_token_unittest.py
diff --git a/tools/origin_trials/generate_token_unittest.py b/tools/origin_trials/generate_token_unittest.py
new file mode 100755
index 0000000000000000000000000000000000000000..06a2cc917be9d3e6174356cc1146f4f1f85b9302
--- /dev/null
+++ b/tools/origin_trials/generate_token_unittest.py
@@ -0,0 +1,68 @@
+#!/usr/bin/env python
+# Copyright (c) 2016 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.
+
+"""Tests for generate_token.py"""
+
+import argparse
+import generate_token
+import unittest
+
+
+class GenerateTokenTest(unittest.TestCase):
+
+  def test_hostname_validation(self):
+    for hostname, expected_result in [
+        ("", None),
+        (None, None),
+        ("example.com", "example.com"),
+        ("127.0.0.1", "127.0.0.1"),
+        ("localhost", "localhost"),
+        ("example.com.", "example.com"),
+        ("ExAmPlE.coM", "example.com"),
+        (".example.com", None),
+        ("example..com", None),
+        ("example123.com", "example123.com"),
+        ("123example.com", "123example.com"),
+        ("a.com", "a.com"),
+        ("1.com", "1.com"),
+        ("-.com", None),
+        ("aa.com", "aa.com"),
+        ("a1.com", "a1.com"),
+        ("a-.com", None),
+        ("-a.com", None),
+        ("123-example.com", "123-example.com"),
+        ("-123example.com", None),
+        ("123example-.com", None),
+        (("a"*63)+".com", ("a"*63)+".com"),
+        (("a"*64)+".com", None),
+        (".".join([("a"*15)]*16), ".".join([("a"*15)]*16)),
+        (".".join([("a"*15)]*17), None)]:
+      self.assertEqual(generate_token.HostnameFromArg(hostname),
+                       expected_result)
+
+  def test_origin_constructed_correctly(self):
+    for origin_arg, expected_result in [
+        ("example.com", "https://example.com:443"),
+        ("https://example.com", "https://example.com:443"),
+        ("https://example.com/", "https://example.com:443"),
+        ("http://example.com", "http://example.com:80"),
+        ("http://127.0.0.1:8000", "http://127.0.0.1:8000"),
+        ("http://user:pass@example.com/path", "http://example.com:80")]:
+      self.assertEqual(generate_token.OriginFromArg(origin_arg),
+                       expected_result)
+
+  def test_origin_fails_correctly(self):
+    for invalid_hostname in [
+        "example..com",
+        "gopher://gopher.tc.umn.edu",
+        "https://",
+        "https://example.com:NaN/",
+        "Not even close"]:
+      self.assertRaises(argparse.ArgumentTypeError,
+                        generate_token.OriginFromArg,
+                        invalid_hostname)
+
+if __name__ == '__main__':
+  unittest.main()