Replace recipes_test.py with a new parallel expectation-based test runner.

scripts/slave/unittests/expect_tests/handle_test.py

Index: scripts/slave/unittests/expect_tests/handle_test.py
diff --git a/scripts/slave/unittests/expect_tests/handle_test.py b/scripts/slave/unittests/expect_tests/handle_test.py
new file mode 100644
index 0000000000000000000000000000000000000000..30a710347311030f11593e545808bd654abfe30f
--- /dev/null
+++ b/scripts/slave/unittests/expect_tests/handle_test.py
@@ -0,0 +1,108 @@
+# Copyright 2014 The Chromium 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 sys
+import time
+import collections
+
+from cStringIO import StringIO
+
+from .types import Handler
+from .serialize import GetCurrentData, DiffData, NonExistant
+
+
+Missing = collections.namedtuple('Missing', 'test')
+Fail = collections.namedtuple('Fail', 'test diff')
+Pass = collections.namedtuple('Pass', 'test')
+
+
+class TestHandler(Handler):
+  """Run the tests."""
+  @classmethod
+  def run_stage_loop(cls, _opts, results, put_next_stage):
+    for test, result in results:
+      current, _ = GetCurrentData(test)
+      if current is NonExistant:
+        put_next_stage(Missing(test))
+      else:
+        diff = DiffData(current, result.data)
+        if not diff:
+          put_next_stage(Pass(test))
+        else:
+          put_next_stage(Fail(test, diff))
+
+  class ResultStageHandler(Handler.ResultStageHandler):
+    def __init__(self, *args):
+      super(TestHandler.ResultStageHandler, self).__init__(*args)
+      self.err_out = StringIO()
+      self.start = time.time()
+      self.errors = collections.defaultdict(int)
+      self.num_tests = 0
+
+    def _emit(self, short, test, verbose):

[agable, 2014/04/03 00:38:00]

This is a really weird input argument order.

+      if self.opts.verbose:
+        print >> sys.stdout, '%s ... %s' % (test.name if test else '????',
+                                            verbose)
+      else:
+        sys.stdout.write(short)
+        sys.stdout.flush()
+
+    def _add_result(self, msg_lines, test, header, category):
+      print >> self.err_out
+      print >> self.err_out, '=' * 70
+      if test is not None:
+        print >> self.err_out, '%s: %s (%s)' % (
+            header, test.name, test.expect_path())
+      print >> self.err_out, '-' * 70
+      if msg_lines:
+        print >> self.err_out, '\n'.join(msg_lines)
+      self.errors[category] += 1
+      self.num_tests += 1
+
+    # Handlers
+    def Pass(self, p):
+      if not self.opts.quiet:
+        self._emit('.', p.test, 'ok')
+      self.num_tests += 1
+
+    def Fail(self, fail):
+      self._emit('F', fail.test, 'FAIL')
+      self._add_result(fail.diff, fail.test, 'FAIL', 'failures')
+      return False
+
+    def TestError(self, test_error):
+      self._emit('E', test_error.test, 'ERROR')
+      self._add_result([test_error.message], test_error.test, 'ERROR', 'errors')
+      return False
+
+    def UnknownError(self, error):
+      self._emit('U', None, 'UNKNOWN ERROR')
+      self._add_result([error.message], None, 'UNKNOWN ERROR', 'unknown_errors')
+      return False
+
+    def Missing(self, missing):
+      self._emit('M', missing.test, 'MISSING')
+      self._add_result([], missing.test, 'MISSING', 'missing')
+      return False
+
+    def finalize(self, aborted):
+      # TODO(iannucci): print summary stats (and timing info?)
+      buf = self.err_out.getvalue()
+      if buf:
+        print
+        print buf
+      if not self.opts.quiet:
+        print
+        print '-' * 70
+        print 'Ran %d tests in %0.3fs' % (
+            self.num_tests, time.time() - self.start)
+        print
+      if aborted:
+        print 'ABORTED'
+      elif self.errors:
+        print 'FAILED (%s)' % (', '.join('%s=%d' % i
+                                         for i in self.errors.iteritems()))
+      elif not self.opts.quiet:
+        print 'OK'
+