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#!/usr/bin/env python
# Copyright (C) 2010 Google Inc. All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are
# met:
#
# * Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# * Redistributions in binary form must reproduce the above
# copyright notice, this list of conditions and the following disclaimer
# in the documentation and/or other materials provided with the
# distribution.
# * Neither the name of Google Inc. nor the names of its
# contributors may be used to endorse or promote products derived from
# this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
"""Compares the text output of a test to the expected text output.
If the output doesn't match, returns FailureTextMismatch and outputs the diff
files into the layout test results directory.
"""
from __future__ import with_statement
import codecs
import errno
import logging
import os.path
from webkitpy.layout_tests.layout_package import test_failures
from webkitpy.layout_tests.test_types import test_type_base
_log = logging.getLogger("webkitpy.layout_tests.test_types.text_diff")
class TestTextDiff(test_type_base.TestTypeBase):
def _get_normalized_output_text(self, output):
# Some tests produce "\r\n" explicitly. Our system (Python/Cygwin)
# helpfully changes the "\n" to "\r\n", resulting in "\r\r\n".
norm = output.replace("\r\r\n", "\r\n").strip("\r\n").replace(
"\r\n", "\n")
return norm + "\n"
def compare_output(self, port, filename, test_args, actual_test_output,
expected_test_output):
"""Implementation of CompareOutput that checks the output text against
the expected text from the LayoutTest directory."""
failures = []
# If we're generating a new baseline, we pass.
if test_args.new_baseline or test_args.reset_results:
# Although all test_shell/DumpRenderTree output should be utf-8,
# we do not ever decode it inside run-webkit-tests. For some tests
# DumpRenderTree may not output utf-8 text (e.g. webarchives).
self._save_baseline_data(filename, actual_test_output.text,
".txt", encoding=None,
generate_new_baseline=test_args.new_baseline)
return failures
# Normalize text to diff
actual_text = self._get_normalized_output_text(actual_test_output.text)
# Assuming expected_text is already normalized.
expected_text = expected_test_output.text
# Write output files for new tests, too.
if port.compare_text(actual_text, expected_text):
# Text doesn't match, write output files.
self.write_output_files(filename, ".txt", actual_text,
expected_text, encoding=None,
print_text_diffs=True)
if expected_text == '':
failures.append(test_failures.FailureMissingResult())
else:
failures.append(test_failures.FailureTextMismatch())
return failures
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