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#!/usr/bin/python2.4
# Copyright (c) 2006-2008 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.
"""SiteCompare command to invoke the same page in two versions of a browser.
Does the easiest compatibility test: equality comparison between two different
versions of the same browser. Invoked with a series of command line options
that specify which URLs to check, which browser to use, where to store results,
etc.
"""
import os # Functions for walking the directory tree
import tempfile # Get a temporary directory to hold intermediates
import command_line
import drivers # Functions for driving keyboard/mouse/windows, OS-specific
import operators # Functions that, given two bitmaps as input, produce
# output depending on the performance of an operation
import scrapers # Functions that know how to capture a render from
# particular browsers
def CreateCommand(cmdline):
"""Inserts the command and arguments into a command line for parsing."""
cmd = cmdline.AddCommand(
["compare2"],
"Compares the output of two browsers on the same URL or list of URLs",
ValidateCompare2,
ExecuteCompare2)
cmd.AddArgument(
["-b1", "--browser1"], "Full path to first browser's executable",
type="readfile", metaname="PATH", required=True)
cmd.AddArgument(
["-b2", "--browser2"], "Full path to second browser's executable",
type="readfile", metaname="PATH", required=True)
cmd.AddArgument(
["-b", "--browser"], "Which browser to use", type="string",
default="chrome")
cmd.AddArgument(
["-b1v", "--browser1ver"], "Version of first browser", metaname="VERSION")
cmd.AddArgument(
["-b2v", "--browser2ver"], "Version of second browser", metaname="VERSION")
cmd.AddArgument(
["-b1n", "--browser1name"], "Optional name for first browser (used in "
"directory to hold intermediate files)", metaname="NAME")
cmd.AddArgument(
["-b2n", "--browser2name"], "Optional name for second browser (used in "
"directory to hold intermediate files)", metaname="NAME")
cmd.AddArgument(
["-o", "--outdir"], "Directory to store scrape files", metaname="DIR")
cmd.AddArgument(
["-u", "--url"], "URL to compare")
cmd.AddArgument(
["-l", "--list"], "List of URLs to compare", type="readfile")
cmd.AddMutualExclusion(["--url", "--list"])
cmd.AddArgument(
["-s", "--startline"], "First line of URL list", type="int")
cmd.AddArgument(
["-e", "--endline"], "Last line of URL list (exclusive)", type="int")
cmd.AddArgument(
["-c", "--count"], "Number of lines of URL file to use", type="int")
cmd.AddDependency("--startline", "--list")
cmd.AddRequiredGroup(["--url", "--list"])
cmd.AddDependency("--endline", "--list")
cmd.AddDependency("--count", "--list")
cmd.AddMutualExclusion(["--count", "--endline"])
cmd.AddDependency("--count", "--startline")
cmd.AddArgument(
["-t", "--timeout"], "Amount of time (seconds) to wait for browser to "
"finish loading",
type="int", default=60)
cmd.AddArgument(
["-log", "--logfile"], "File to write output", type="string", required=True)
cmd.AddArgument(
["-sz", "--size"], "Browser window size", default=(800, 600), type="coords")
cmd.AddArgument(
["-m", "--maskdir"], "Path that holds masks to use for comparison")
cmd.AddArgument(
["-d", "--diffdir"], "Path to hold the difference of comparisons that fail")
def ValidateCompare2(command):
"""Validate the arguments to compare2. Raises ParseError if failed."""
executables = [".exe", ".com", ".bat"]
if (os.path.splitext(command["--browser1"])[1].lower() not in executables or
os.path.splitext(command["--browser2"])[1].lower() not in executables):
raise command_line.ParseError("Browser filename must be an executable")
def ExecuteCompare2(command):
"""Executes the Compare2 command."""
if command["--url"]:
url_list = [command["--url"]]
else:
startline = command["--startline"]
if command["--count"]:
endline = startline+command["--count"]
else:
endline = command["--endline"]
url_list = [url.strip() for url in
open(command["--list"], "r").readlines()[startline:endline]]
log_file = open(command["--logfile"], "w")
outdir = command["--outdir"]
if not outdir: outdir = tempfile.gettempdir()
scrape_info_list = []
class ScrapeInfo(object):
"""Helper class to hold information about a scrape."""
__slots__ = ["browser_path", "scraper", "outdir", "result"]
for index in xrange(1, 3):
scrape_info = ScrapeInfo()
scrape_info.browser_path = command["--browser%d" % index]
scrape_info.scraper = scrapers.GetScraper(
(command["--browser"], command["--browser%dver" % index]))
if command["--browser%dname" % index]:
scrape_info.outdir = os.path.join(outdir,
command["--browser%dname" % index])
else:
scrape_info.outdir = os.path.join(outdir, str(index))
drivers.windowing.PreparePath(scrape_info.outdir)
scrape_info_list.append(scrape_info)
compare = operators.GetOperator("equals_with_mask")
for url in url_list:
success = True
for scrape_info in scrape_info_list:
scrape_info.result = scrape_info.scraper.Scrape(
[url], scrape_info.outdir, command["--size"], (0, 0),
command["--timeout"], path=scrape_info.browser_path)
if not scrape_info.result:
scrape_info.result = "success"
else:
success = False
result = "unknown"
if success:
result = "equal"
file1 = drivers.windowing.URLtoFilename(
url, scrape_info_list[0].outdir, ".bmp")
file2 = drivers.windowing.URLtoFilename(
url, scrape_info_list[1].outdir, ".bmp")
comparison_result = compare.Compare(file1, file2,
maskdir=command["--maskdir"])
if comparison_result is not None:
result = "not-equal"
if command["--diffdir"]:
comparison_result[1].save(
drivers.windowing.URLtoFilename(url, command["--diffdir"], ".bmp"))
# TODO(jhaas): maybe use the logging module rather than raw file writes
log_file.write("%s %s %s %s\n" % (url,
scrape_info_list[0].result,
scrape_info_list[1].result,
result))
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