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      1 #!/usr/bin/env python
      2 # Copyright 2015 The Chromium Authors. All rights reserved.
      3 # Use of this source code is governed by a BSD-style license that can be
      4 # found in the LICENSE file.
      5 
      6 import argparse
      7 import os
      8 import subprocess
      9 import sys
     10 
     11 script_dir = os.path.dirname(os.path.realpath(__file__))
     12 tool_dir = os.path.abspath(os.path.join(script_dir, '../../../pylib'))
     13 sys.path.insert(0, tool_dir)
     14 
     15 from clang import plugin_testing
     16 
     17 
     18 class BlinkGcPluginTest(plugin_testing.ClangPluginTest):
     19   """Test harness for the Blink GC plugin."""
     20 
     21   def AdjustClangArguments(self, clang_cmd):
     22     clang_cmd.append('-Wno-inaccessible-base')
     23 
     24   def ProcessOneResult(self, test_name, actual):
     25     # Some Blink GC plugins dump a JSON representation of the object graph, and
     26     # use the processed results as the actual results of the test.
     27     if os.path.exists('%s.graph.json' % test_name):
     28       try:
     29         actual = subprocess.check_output(
     30             ['python', '../../process-graph.py', '-c',
     31              '%s.graph.json' % test_name],
     32             stderr=subprocess.STDOUT)
     33       except subprocess.CalledProcessError, e:
     34         # The graph processing script returns a failure exit code if the graph
     35         # is bad (e.g. it has a cycle). The output still needs to be captured in
     36         # that case, since the expected results capture the errors.
     37         actual = e.output
     38       finally:
     39         # Clean up the .graph.json file to prevent false passes from stale
     40         # results from a previous run.
     41         os.remove('%s.graph.json' % test_name)
     42     return super(BlinkGcPluginTest, self).ProcessOneResult(test_name, actual)
     43 
     44 
     45 def main():
     46   parser = argparse.ArgumentParser()
     47   parser.add_argument(
     48       '--reset-results',
     49       action='store_true',
     50       help='If specified, overwrites the expected results in place.')
     51   parser.add_argument('clang_path', help='The path to the clang binary.')
     52   parser.add_argument('plugin_path',
     53                       nargs='?',
     54                       help='The path to the plugin library, if any.')
     55   args = parser.parse_args()
     56 
     57   return BlinkGcPluginTest(
     58       os.path.dirname(os.path.realpath(__file__)),
     59       args.clang_path,
     60       args.plugin_path,
     61       'blink-gc-plugin',
     62       args.reset_results).Run()
     63 
     64 
     65 if __name__ == '__main__':
     66   sys.exit(main())
     67