[Extensions] Add extension feature generation code

tools/json_schema_compiler/feature_compiler_test.py

+#!/usr/bin/env python
+# Copyright 2015 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.
+
+import feature_compiler
+import unittest
+
+class FeatureCompilerTest(unittest.TestCase):
+  """Test the FeatureCompiler. Note that we test that the expected features are
+  generated more thoroughly in features_generation_unittest.cc. And, of course,
+  this is most exhaustively tested through Chrome's compilation process (if a
+  feature fails to parse, the compile fails).
+  These tests primarily focus on catching errors during parsing.
+  """
+  def _parseFeature(self, value):
+    """Parses a feature from the given value and returns the result."""
+    f = feature_compiler.Feature('alpha')
+    f.Parse(value)
+    return f
+
+  def _hasError(self, f, error):
+    """Asserts that |error| is present somewhere in the given feature's
+    errors."""
+    self.assertTrue(f.errors)
+    self.assertNotEqual(-1, str(f.errors).find(error), str(f.errors))
+
+  def setUp(self):
+    feature_compiler.ENABLE_ASSERTIONS = False
+    feature_compiler.STRINGS_TO_UNICODE = True
+
+  def testFeature(self):
+    # Test some basic feature parsing for a sanity check.
+    f = self._parseFeature({
+      'blacklist': ['aaa', 'bbb'],
+      'channel': 'stable',
+      'command_line_switch': 'switch',
+      'component_extensions_auto_granted': False,
+      'contexts': ['blessed_extension', 'blessed_web_page'],
+      'default_parent': True,
+      'dependencies': ['dependency1', 'dependency2'],
+      'extension_types': ['extension'],
+      'location': 'component',
+      'internal': True,
+      'matches': ['*://*/*'],
+      'max_manifest_version': 1,
+      'noparent': True,
+      'platforms': ['mac', 'win'],
+      'whitelist': ['zzz', 'yyy']
+    })
+    self.assertFalse(f.errors)
+
+  def testUnknownKeyError(self):
+    f = self._parseFeature({
+      'contexts': ['blessed_extension'],
+      'channel': 'stable',
+      'unknownkey': 'unknownvalue'
+    })
+    self._hasError(f, 'Unrecognized key')
+
+  def testUnknownEnumValue(self):
+    f = self._parseFeature({
+      'contexts': ['blessed_extension', 'unknown_context'],
+      'channel': 'stable'
+    })
+    self._hasError(f, 'Illegal value: "unknown_context"')
+
+  def testImproperType(self):
+    f = self._parseFeature({'min_manifest_version': '1'})
+    self._hasError(f, 'Illegal value: "1"')
+
+  def testImproperSubType(self):
+    f = self._parseFeature({'dependencies': [1, 2, 3]})
+    self._hasError(f, 'Illegal value: "1"')
+
+  def testImproperValue(self):
+    f = self._parseFeature({'noparent': False})
+    self._hasError(f, 'Illegal value: "False"')
+
+if __name__ == '__main__':
+  unittest.main()