Enable strict coverage for json, path, platform, properties, raw_io

recipe_modules/properties/example.py

 # Copyright 2014 The LUCI Authors. All rights reserved.
 # Use of this source code is governed under the Apache License, Version 2.0
 # that can be found in the LICENSE file.
 
 from recipe_engine.recipe_api import Property
 
 DEPS = [
   'properties',
   'step',
 ]
 
 PROPERTIES = {
   'test_prop': Property(),
   'foo.bar-bam': Property(param_name='param_name_test'),
 }
 
 def RunSteps(api, test_prop, param_name_test):
   api.step('echo', ['echo'] + [repr(test_prop), repr(param_name_test)])
 
   properties = api.properties.thaw()
   api.step('echo all', ['echo'] + map(repr, sorted(properties.iteritems())))
 
   # It should behave like a real dictionary.
   assert len(properties) == len(api.properties)
   for k in api.properties:
-    assert k in properties
-    # We would assert that v is there too, but sometimes it's frozen...
+    api.step('echo %s' % k, ['echo', repr(api.properties[k])])
 
 
 def GenTests(api):
   pd = {'foo.bar-bam': 'thing'}
   yield api.test('basic') + api.properties(
     test_prop={'key': 'value'}, **pd)
   yield api.test('lists') + api.properties(
     test_prop={'key': ['value', ['value']]}, **pd)
   yield api.test('dicts') + api.properties(
     test_prop={'key': {'key': 'value', 'other_key': {'key': 'value'}}},
@@ skipping 26 matching lines @@
             git_url='https://chrome-internal.googlesource.com/infra/hidden',
             **pd))
   yield (api.test('buildbot_tryserver_gerrit_override_both') +
          api.properties.tryserver(
             gerrit_project='custom',
             gerrit_url='https://gerrit.my.host',
             git_url='https://git.my.host/custom',
             patch_issue=989898,
             patch_set=3,
             **pd))