[test] Fix assert for predictable mode in test runner.

tools/testrunner/local/execution.py

 # Copyright 2012 the V8 project authors. All rights reserved.
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions are
 # met:
 #
 #     * Redistributions of source code must retain the above copyright
 #       notice, this list of conditions and the following disclaimer.
 #     * Redistributions in binary form must reproduce the above
 #       copyright notice, this list of conditions and the following
 #       disclaimer in the documentation and/or other materials provided
@@ skipping 237 matching lines @@
       self._VerbosePrint("Closing database connection.")
       self._RunPerfSafe(lambda: self.perf_data_manager.close())
       if self.perf_failures:
         # Nuke perf data in case of failures. This might not work on windows as
         # some files might still be open.
         print "Deleting perf test data due to db corruption."
         shutil.rmtree(self.datapath)
     if queued_exception:
       raise queued_exception
 
-    # Make sure that any allocations were printed in predictable mode.
-    assert not self.context.predictable or self.printed_allocations
+    # Make sure that any allocations were printed in predictable mode (if we
+    # ran any tests).
+    assert (
+        not self.total or
+        not self.context.predictable or
+        self.printed_allocations
+    )
 
   def _VerbosePrint(self, text):
     if self.context.verbose:
       print text
       sys.stdout.flush()
 
   def GetCommand(self, test):
     d8testflag = []
     shell = test.suite.shell()
     if shell == "d8":
       d8testflag = ["--test"]
     if utils.IsWindows():
       shell += ".exe"
     cmd = (self.context.command_prefix +
            [os.path.abspath(os.path.join(self.context.shell_dir, shell))] +
            d8testflag +
            ["--random-seed=%s" % self.context.random_seed] +
            test.suite.GetFlagsForTestCase(test, self.context) +
            self.context.extra_flags)
     return cmd
 
 
 class BreakNowException(Exception):
   def __init__(self, value):
     self.value = value
   def __str__(self):
     return repr(self.value)