Record/replay support to test.py

tools/execute_recorded_testcases.py

Index: tools/execute_recorded_testcases.py
diff --git a/tools/execute_recorded_testcases.py b/tools/execute_recorded_testcases.py
new file mode 100755
index 0000000000000000000000000000000000000000..f30727779f02cb850b2a07d93d2d4f324c415ac0
--- /dev/null
+++ b/tools/execute_recorded_testcases.py
@@ -0,0 +1,67 @@
+#!/usr/bin/env python
+
+import sys
+import json
+import subprocess
+import time
+import threading
+
+def run_command(name, executable, arguments, timeout_in_seconds):
+  print "Running %s: '%s'" % (name, [executable] + arguments)
+
+  # The timeout_handler will set this to True if the command times out.
+  timeout_value = {'did_timeout' : False}
+
+  start = time.time()
+
+  process = subprocess.Popen([executable] + arguments,
+                             stdout=subprocess.PIPE,
+                             stderr=subprocess.PIPE)
+  def timeout_handler():
+    timeout_value['did_timeout'] = True
+    process.kill()
+  timer = threading.Timer(timeout_in_seconds, timeout_handler)
+  timer.start()
+
+  stdout, stderr = process.communicate()
+  exit_code = process.wait()
+  timer.cancel()
+
+  end = time.time()
+
+  return (exit_code, stdout, stderr, end - start, timeout_value['did_timeout'])
+
+def main(args):
+  recording_file = args[0]
+  result_file = args[1]
+
+  with open(recording_file) as fd:
+    test_cases = json.load(fd)
+
+  for test_case in test_cases:
+    name = test_case['name']
+    command = test_case['command']
+    executable = command['executable']
+    arguments = command['arguments']
+    timeout_limit = command['timeout_limit']
+
+    exit_code, stdout, stderr, duration, did_timeout = (
+        run_command(name, executable, arguments, timeout_limit))
+
+    test_case['command_output'] = {
+      'exit_code' : exit_code,
+      'stdout' : stdout,
+      'stderr' : stderr,
+      'duration' : duration,
+      'did_timeout' : did_timeout,
+    }
+  with open(result_file, 'w') as fd:
+    json.dump(test_cases, fd)
+
+if __name__ == '__main__':
+  if len(sys.argv) != 3:
+    print >> sys.stderr, ("Usage: %s <input-file.json> <output-file.json>"
+                          % sys.argv[0])
+    sys.exit(1)
+  sys.exit(main(sys.argv[1:]))
+