Make the MockDRT implementation work again and add support for --actuals.

Tools/Scripts/webkitpy/layout_tests/port/mock_drt.py

Index: Tools/Scripts/webkitpy/layout_tests/port/mock_drt.py
diff --git a/Tools/Scripts/webkitpy/layout_tests/port/mock_drt.py b/Tools/Scripts/webkitpy/layout_tests/port/mock_drt.py
index 7992a00a12c4de6e34bfb1de0f14b921ab517659..2e7de582879cc613a04863ac3b0033da901318a3 100644
--- a/Tools/Scripts/webkitpy/layout_tests/port/mock_drt.py
+++ b/Tools/Scripts/webkitpy/layout_tests/port/mock_drt.py
@@ -41,6 +41,7 @@ import logging
 import optparse
 import os
 import sys
+import types
 
 # Since we execute this script directly as part of the unit tests, we need to ensure
 # that Tools/Scripts is in sys.path for the next imports to work correctly.
@@ -48,6 +49,7 @@ script_dir = os.path.dirname(os.path.dirname(os.path.dirname(os.path.dirname(os.
 if script_dir not in sys.path:
     sys.path.append(script_dir)
 
+from webkitpy.common import read_checksum_from_png
 from webkitpy.common.system.systemhost import SystemHost
 from webkitpy.layout_tests.port.driver import DriverInput, DriverOutput
 from webkitpy.layout_tests.port.factory import PortFactory
@@ -64,6 +66,8 @@ class MockDRTPort(object):
 
     def __init__(self, host, port_name, **kwargs):
         self.__delegate = PortFactory(host).get(port_name.replace('mock-', ''), **kwargs)
+        self.__delegate_driver_class = self.__delegate._driver_class
+        self.__delegate._driver_class = types.MethodType(self._driver_class, self.__delegate)
 
     def __getattr__(self, name):
         return getattr(self.__delegate, name)
@@ -74,18 +78,17 @@ class MockDRTPort(object):
     def check_sys_deps(self, needs_http):
         return True
 
-    def _driver_class(self):
+    def _driver_class(self, delegate):
         return self._mocked_driver_maker
 
-    @staticmethod
-    def _mocked_driver_maker(port, worker_number, pixel_tests, no_timeout=False):
-        path_to_this_file = port.host.filesystem.abspath(__file__.replace('.pyc', '.py'))
-        driver = port.__delegate._driver_class()(port, worker_number, pixel_tests, no_timeout)
-        driver.cmd_line = port._overriding_cmd_line(driver.cmd_line,
-                                                    port.__delegate._path_to_driver(),
+    def _mocked_driver_maker(self, port, worker_number, pixel_tests, no_timeout=False):
+        path_to_this_file = self.host.filesystem.abspath(__file__.replace('.pyc', '.py'))
+        driver = self.__delegate_driver_class()(self, worker_number, pixel_tests, no_timeout)
+        driver.cmd_line = self._overriding_cmd_line(driver.cmd_line,
+                                                    self.__delegate._path_to_driver(),
                                                     sys.executable,
                                                     path_to_this_file,
-                                                    port.__delegate.name())
+                                                    self.__delegate.name())
         return driver
 
     @staticmethod
@@ -122,47 +125,44 @@ class MockDRTPort(object):
     def release_http_lock(self):
         pass
 
-    def show_results_html_file(self, results_filename):
-        pass
-
     def _make_wdiff_available(self):
         self.__delegate._wdiff_available = True
 
+    def setup_environ_for_server(self, server_name):
+        env = self.__delegate.setup_environ_for_server()
+        # We need to propagate PATH down so the python code can find the checkout.
+        env['PATH'] = os.environ['PATH']
+        return env
+
+    def lookup_virtual_test_args(self, test_name):
+        suite = self.__delegate.lookup_virtual_suite(test_name)
+        return suite.args + ['--virtual-test-suite-name', suite.name, '--virtual-test-suite-base', suite.base]
 
 def main(argv, host, stdin, stdout, stderr):
     """Run the tests."""
 
     options, args = parse_options(argv)
-    if options.test_shell:
-        drt = MockTestShell(options, args, host, stdin, stdout, stderr)
-    else:
-        drt = MockDRT(options, args, host, stdin, stdout, stderr)
+    drt = MockDRT(options, args, host, stdin, stdout, stderr)
     return drt.run()
 
 
 def parse_options(argv):
-    # FIXME: We have to do custom arg parsing instead of using the optparse
-    # module.  First, Chromium and non-Chromium DRTs have a different argument
-    # syntax.  Chromium uses --pixel-tests=<path>, and non-Chromium uses
-    # --pixel-tests as a boolean flag. Second, we don't want to have to list
-    # every command line flag DRT accepts, but optparse complains about
-    # unrecognized flags. At some point it might be good to share a common
-    # DRT options class between this file and webkit.py and chromium.py
-    # just to get better type checking.
-    platform_index = argv.index('--platform')
-    platform = argv[platform_index + 1]
-
-    pixel_tests = False
-    pixel_path = None
-    test_shell = '--test-shell' in argv
-    if test_shell:
-        for arg in argv:
-            if arg.startswith('--pixel-tests'):
-                pixel_tests = True
-                pixel_path = arg[len('--pixel-tests='):]
-    else:
-        pixel_tests = '--pixel-tests' in argv
-    options = optparse.Values({'test_shell': test_shell, 'platform': platform, 'pixel_tests': pixel_tests, 'pixel_path': pixel_path})
+    # We do custom arg parsing instead of using the optparse module
+    # because we don't want to have to list every command line flag DRT
+    # accepts, and optparse complains about unrecognized flags.
+
+    def get_arg(arg_name):
+        if arg_name in argv:
+            index = argv.index(arg_name)
+            return argv[index + 1]
+        return None
+
+    options = optparse.Values({
+        'actual_directory':        get_arg('--actual-directory'),
+        'platform':                get_arg('--platform'),
+        'virtual_test_suite_base': get_arg('--virtual-test-suite-base'),
+        'virtual_test_suite_name': get_arg('--virtual-test-suite-name'),
+    })
     return (options, argv)
 
 
@@ -195,21 +195,28 @@ class MockDRT(object):
 
     def input_from_line(self, line):
         vals = line.strip().split("'")
-        if len(vals) == 1:
-            uri = vals[0]
-            checksum = None
-        else:
-            uri = vals[0]
-            checksum = vals[1]
+        uri = vals[0]
+        checksum = None
+        should_run_pixel_tests = False
+        if len(vals) == 2 and vals[1] == '--pixel-test':
+            should_run_pixel_tests = True
+        elif len(vals) == 3 and vals[1] == '--pixel-test':
+            should_run_pixel_tests = True
+            checksum = vals[2]
+        elif len(vals) != 1:
+            raise NotImplementedError
+
         if uri.startswith('http://') or uri.startswith('https://'):
             test_name = self._driver.uri_to_test(uri)
         else:
             test_name = self._port.relative_test_filename(uri)
 
-        return DriverInput(test_name, 0, checksum, self._options.pixel_tests)
+        return DriverInput(test_name, 0, checksum, should_run_pixel_tests)
 
     def output_for_test(self, test_input, is_reftest):
         port = self._port
+        if self._options.virtual_test_suite_name:
+            test_input.test_name = test_input.test_name.replace(self._options.virtual_test_suite_base, self._options.virtual_test_suite_name)
         actual_text = port.expected_text(test_input.test_name)
         actual_audio = port.expected_audio(test_input.test_name)
         actual_image = None
@@ -223,10 +230,25 @@ class MockDRT(object):
                 actual_text = 'not reference text\n'
                 actual_checksum = 'not-mock-checksum'
                 actual_image = 'not blank'
-        elif self._options.pixel_tests and test_input.image_hash:
+        elif test_input.should_run_pixel_test and test_input.image_hash:
             actual_checksum = port.expected_checksum(test_input.test_name)
             actual_image = port.expected_image(test_input.test_name)
 
+        if self._options.actual_directory:
+            actual_path = port._filesystem.join(self._options.actual_directory, test_input.test_name)
+            root, _ = port._filesystem.splitext(actual_path)
+            text_path = root + '-actual.txt'
+            if port._filesystem.exists(text_path):
+                actual_text = port._filesystem.read_binary_file(text_path)
+            audio_path = root + '-actual.wav'
+            if port._filesystem.exists(audio_path):
+                actual_audio = port._filesystem.read_binary_file(audio_path)
+            image_path = root + '-actual.png'
+            if port._filesystem.exists(image_path):
+                actual_image = port._filesystem.read_binary_file(image_path)
+                with port._filesystem.open_binary_file_for_reading(image_path) as filehandle:
+                    actual_checksum = read_checksum_from_png.read_checksum(filehandle)
+
         return DriverOutput(actual_text, actual_image, actual_checksum, actual_audio)
 
     def write_test_output(self, test_input, output, is_reftest):
@@ -234,6 +256,7 @@ class MockDRT(object):
             self._stdout.write('Content-Type: audio/wav\n')
             self._stdout.write('Content-Transfer-Encoding: base64\n')
             self._stdout.write(base64.b64encode(output.audio))
+            self._stdout.write('\n')
         else:
             self._stdout.write('Content-Type: text/plain\n')
             # FIXME: Note that we don't ensure there is a trailing newline!
@@ -243,7 +266,7 @@ class MockDRT(object):
 
         self._stdout.write('#EOF\n')
 
-        if self._options.pixel_tests and output.image_hash:
+        if test_input.should_run_pixel_test and output.image_hash:
             self._stdout.write('\n')
             self._stdout.write('ActualHash: %s\n' % output.image_hash)
             self._stdout.write('ExpectedHash: %s\n' % test_input.image_hash)
@@ -257,43 +280,6 @@ class MockDRT(object):
         self._stderr.flush()
 
 
-class MockTestShell(MockDRT):
-    def input_from_line(self, line):
-        vals = line.strip().split()
-        if len(vals) == 3:
-            uri, timeout, checksum = vals
-        else:
-            uri, timeout = vals
-            checksum = None
-
-        test_name = self._driver.uri_to_test(uri)
-        return DriverInput(test_name, timeout, checksum, self._options.pixel_tests)
-
-    def output_for_test(self, test_input, is_reftest):
-        # FIXME: This is a hack to make virtual tests work. Need something more general.
-        original_test_name = test_input.test_name
-        if '--enable-accelerated-2d-canvas' in self._args and 'canvas' in test_input.test_name:
-            test_input.test_name = 'platform/chromium/virtual/gpu/' + test_input.test_name
-        output = super(MockTestShell, self).output_for_test(test_input, is_reftest)
-        test_input.test_name = original_test_name
-        return output
-
-    def write_test_output(self, test_input, output, is_reftest):
-        self._stdout.write("#URL:%s\n" % self._driver.test_to_uri(test_input.test_name))
-        if self._options.pixel_tests and output.image_hash:
-            self._stdout.write("#MD5:%s\n" % output.image_hash)
-            if output.image:
-                self._host.filesystem.maybe_make_directory(self._host.filesystem.dirname(self._options.pixel_path))
-                self._host.filesystem.write_binary_file(self._options.pixel_path, output.image)
-        if output.text:
-            self._stdout.write(output.text)
-
-        if output.text and not output.text.endswith('\n'):
-            self._stdout.write('\n')
-        self._stdout.write('#EOF\n')
-        self._stdout.flush()
-
-
 if __name__ == '__main__':
     # Note that the Mock in MockDRT refers to the fact that it is emulating a
     # real DRT, and as such, it needs access to a real SystemHost, not a MockSystemHost.