# Copyright (C) 2012 Balazs Ankes ([email protected]) University of Szeged
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
# 1. Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# 2. 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.
#
# 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.
"""Supports checking WebKit style in png files."""
from blinkpy.common import read_checksum_from_png
from blinkpy.common.system.system_host import SystemHost
class PNGChecker(object):
categories = set(['image/png'])
def __init__(self, file_path, handle_style_error, host=None):
self._file_path = file_path
self._handle_style_error = handle_style_error
self._host = host or SystemHost()
self._fs = self._host.filesystem
def check(self, inline=None):
if self._fs.exists(
self._file_path) and self._file_path.endswith('-expected.png'):
with self._fs.open_binary_file_for_reading(
self._file_path) as filehandle:
if not read_checksum_from_png.read_checksum(filehandle):
self._handle_style_error(
0, 'image/png', 5,
'Image lacks a checksum. Generate pngs using run_web_tests.py to ensure they have a checksum.'
)
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