Add ability to test stoneridge without modifying source.

This lets us test the harness without running any actual tests. One
fake test is run, and DNS will not actually be updated, when everything
is run as necessary.

srdns.py

@@ -21,6 +21,8 @@ dnspat = re.compile('^[0-9]+ : ([0-9.]+)$')
 
 rundir = tempfile.mkdtemp()
 
+nochange = False
+
 class BaseDnsModifier(SocketServer.BaseRequestHandler):
     """A class providing an interface for modifying DNS servers on a platform.
     """
@@ -87,7 +89,10 @@ class MacDnsModifier(BaseDnsModifier):
                 orig_dns = f.read().strip()
 
         if orig_dns is not None:
-            self._set_dns(orig_dns)
+            if nochange:
+                print 'Reset to %s' % (orig_dns,)
+            else:
+                self._set_dns(orig_dns)
 
     def set_dns(self, dnsserver):
         # Save the current primary dns server
@@ -104,7 +109,10 @@ class MacDnsModifier(BaseDnsModifier):
                 f.write('%s\n' % (' '.join(orig_dns),))
 
         # Now set the primary dns server to our new one
-        self._set_dns(dnsserver)
+        if nochange:
+            print 'Set to %s' % (dnsserver,)
+        else:
+            self._set_dns(dnsserver)
 
 class LinuxDnsModifier(BaseDnsModifier):
     def setup(self):
@@ -176,8 +184,12 @@ def main():
     parser.add_argument('--pidfile', dest='pidfile')
     parser.add_argument('--log', dest='log')
     parser.add_argument('--nodaemon', dest='nodaemon', action='store_true')
+    parser.add_argument('--nochange', dest='nochange', action='store_true')
     args = parser.parse_args()
 
+    global nochange
+    nochange = args.nochange
+
     if args.nodaemon:
         if args.pidfile:
             do_mutex_exit(parser, '--pidfile')

stoneridge_runner.py

@@ -35,8 +35,12 @@ class StoneRidgeRunner(object):
         if not self.tests:
             logging.debug('searching for all tests in %s' %
                     (stoneridge.testroot,))
-            tests = [os.path.basename(f) for f in
-                     glob.glob(os.path.join(stoneridge.testroot, '*.js'))]
+            if stoneridge.get_config('test', 'enabled'):
+                tests = ['fake.js']
+            else:
+                tests = [os.path.basename(f) for f in
+                         glob.glob(os.path.join(stoneridge.testroot, '*.js'))]
+                tests.remove('fake.js')
             logging.debug('tests found %s' % (tests,))
             return tests
 

tests/fake.js

@@ -0,0 +1,7 @@
+function run_test()
+{
+  startTime = new Date();
+  endTime = new Date(startTime.valueOf() + 100);
+  do_write_result("junk", startTime, endTime);
+  do_test_finish();
+}