[message] Have message testcfg extend ExpectedOutProc

This will make --regenerate_expected_files flag work for message tests.

Bug: v8:10773
Change-Id: Ica87bd69bd0a41e2a3c168d2200d0cd0c7f094da
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2842387
Commit-Queue: Zhi An Ng <zhin@chromium.org>
Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#74127}

test/message/testcfg.py

@@ -49,6 +49,8 @@ class TestCase(testcase.D8TestCase):
   def __init__(self, *args, **kwargs):
     super(TestCase, self).__init__(*args, **kwargs)
 
+    # get_source() relies on this being set.
+    self._base_path = os.path.join(self.suite.root, self.path)
     source = self.get_source()
     self._source_files = self._parse_source_files(source)
     self._source_flags = self._parse_source_flags(source)
@@ -78,13 +80,12 @@ class TestCase(testcase.D8TestCase):
     return self._source_flags
 
   def _get_source_path(self):
-    base_path = os.path.join(self.suite.root, self.path)
     # Try .js first, and fall back to .mjs.
     # TODO(v8:9406): clean this up by never separating the path from
     # the extension in the first place.
-    if os.path.exists(base_path + self._get_suffix()):
-      return base_path + self._get_suffix()
-    return base_path + '.mjs'
+    if os.path.exists(self._base_path + self._get_suffix()):
+      return self._base_path + self._get_suffix()
+    return self._base_path + '.mjs'
 
   def skip_predictable(self):
     # Message tests expected to fail don't print allocation output for
@@ -94,8 +95,10 @@ class TestCase(testcase.D8TestCase):
   @property
   def output_proc(self):
     return message.OutProc(self.expected_outcomes,
-                           os.path.join(self.suite.root, self.path),
-                           self._expected_fail())
+                           self._base_path,
+                           self._expected_fail(),
+                           self._base_path + '.out',
+                           self.suite.test_config.regenerate_expected_files)
 
 
 def GetSuite(*args, **kwargs):

tools/testrunner/outproc/message.py

@@ -9,9 +9,11 @@ import re
 from . import base
 
 
-class OutProc(base.OutProc):
-  def __init__(self, expected_outcomes, basepath, expected_fail):
-    super(OutProc, self).__init__(expected_outcomes)
+class OutProc(base.ExpectedOutProc):
+  def __init__(self, expected_outcomes, basepath, expected_fail,
+               expected_filename, regenerate_expected_files):
+    super(OutProc, self).__init__(expected_outcomes, expected_filename,
+                                  regenerate_expected_files)
     self._basepath = basepath
     self._expected_fail = expected_fail