Refactor mjsunit/fuzz-natives-* into a separate test suite.

test/fuzz-natives/testcfg.py

+# Copyright 2014 the V8 project authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+import os
+
+from testrunner.local import commands
+from testrunner.local import testsuite
+from testrunner.local import utils
+from testrunner.objects import testcase
+
+class FuzzNativesTestSuite(testsuite.TestSuite):
+
+  def __init__(self, name, root):
+    super(FuzzNativesTestSuite, self).__init__(name, root)
+
+  def ListTests(self, context):
+    shell = os.path.abspath(os.path.join(context.shell_dir, self.shell()))
+    if utils.IsWindows():
+      shell += ".exe"
+    output = commands.Execute(
+        context.command_prefix +
+        [shell, "--allow-natives-syntax", "-e",
+         "try { var natives = %ListNatives();"
+         "  for (var n in natives) { print(natives[n]); }"
+         "} catch(e) {}"] +
+        context.extra_flags)
+    if output.exit_code != 0:

[Michael Achenbach, 2014/04/29 15:51:53]

If the command fails, the test driver would rather quietly pass with no tests...
But no need to do something about that now... I assume in release mode, the
command returns nothing?

[Jakob Kummerow, 2014/04/30 13:46:12]

%ListNatives() isn't available in Release; the try..catch ensures that the
command silently terminates with empty output.

You can have an assert instead of the empty result, it most likely won't ever
make a difference in practice.

+      print output.stdout
+      print output.stderr
+      return []
+    tests = []
+    for line in output.stdout.strip().split():
+      (name, argc) = line.split(",")
+      flags = ["--allow-natives-syntax",
+               "-e", "var NAME = '%s', ARGC = %s;" % (name, argc)]
+      test = testcase.TestCase(self, name, flags)
+      tests.append(test)
+    return tests
+
+  def GetFlagsForTestCase(self, testcase, context):
+    name = testcase.path
+    basefile = os.path.join(self.root, "base.js")
+    return testcase.flags + [basefile] + context.mode_flags
+
+def GetSuite(name, root):
+  return FuzzNativesTestSuite(name, root)