Add a library suitable for libfuzzer with a small unit test runner shell

tools/testrunner/objects/testcase.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 12 matching lines @@
 # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 
 from . import output
 
 class TestCase(object):
   def __init__(self, suite, path, variant='default', flags=None,
-               dependency=None):
+               dependency=None, override_shell=None):
     self.suite = suite        # TestSuite object
     self.path = path          # string, e.g. 'div-mod', 'test-api/foo'
     self.flags = flags or []  # list of strings, flags specific to this test
     self.variant = variant    # name of the used testing variant
     self.dependency = dependency  # |path| for testcase that must be run first
+    self.override_shell = override_shell
     self.outcomes = set([])
     self.output = None
     self.id = None  # int, used to map result back to TestCase instance
     self.duration = None  # assigned during execution
     self.run = 1  # The nth time this test is executed.
 
   def CopyAddingFlags(self, variant, flags):
     copy = TestCase(self.suite, self.path, variant, self.flags + flags,
-                    self.dependency)
+                    self.dependency, self.override_shell)
     copy.outcomes = self.outcomes
     return copy
 
   def PackTask(self):
     """
     Extracts those parts of this object that are required to run the test
     and returns them as a JSON serializable object.
     """
     assert self.id is not None
     return [self.suitename(), self.path, self.variant, self.flags,
-            self.dependency, list(self.outcomes or []), self.id]
+            self.dependency, self.override_shell, list(self.outcomes or []),
+            self.id]
 
   @staticmethod
   def UnpackTask(task):
     """Creates a new TestCase object based on packed task data."""
     # For the order of the fields, refer to PackTask() above.
-    test = TestCase(str(task[0]), task[1], task[2], task[3], task[4])
-    test.outcomes = set(task[5])
-    test.id = task[6]
+    test = TestCase(str(task[0]), task[1], task[2], task[3], task[4], task[5])
+    test.outcomes = set(task[6])
+    test.id = task[7]
     test.run = 1
     return test
 
   def SetSuiteObject(self, suites):
     self.suite = suites[self.suite]
 
   def PackResult(self):
     """Serializes the output of the TestCase after it has run."""
     self.suite.StripOutputForTransmit(self)
     return [self.id, self.output.Pack(), self.duration]
 
   def MergeResult(self, result):
     """Applies the contents of a Result to this object."""
     assert result[0] == self.id
     self.output = output.Output.Unpack(result[1])
     self.duration = result[2]
 
   def suitename(self):
     return self.suite.name
 
   def GetLabel(self):
     return self.suitename() + "/" + self.suite.CommonTestName(self)
 
+  def shell(self):
+    if self.override_shell:
+      return self.override_shell
+    return self.suite.shell()
+
   def __getstate__(self):
     """Representation to pickle test cases.
 
     The original suite won't be sent beyond process boundaries. Instead
     send the name only and retrieve a process-local suite later.
     """
     return dict(self.__dict__, suite=self.suite.name)