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# Copyright (c) 2012 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.
# The test takes a list of URLs through stdin and prints results in CSV format.
# Example: python run_scroll_test.py < data/urls.txt > test_results.csv
import csv
import logging
import os
import sys
import chrome_remote_control
import scroll
import page_set
import url_test
def Main(args):
options = chrome_remote_control.BrowserOptions()
parser = options.CreateParser("page_scroller <pageset>")
_, args = parser.parse_args(args)
if len(args) != 1:
parser.print_usage()
import page_sets
sys.stderr.write("Available pagesets:\n%s\n\n" % ",\n".join(
[os.path.relpath(f) for f in page_sets.GetAllPageSetFilenames()]))
sys.exit(1)
ps = page_set.PageSet()
ps.LoadFromFile(args[0])
return Run(sys.stdout, options, ps)
def Run(output_stream, options, ps):
results_writer = csv.writer(output_stream)
results_writer.writerow(['URL', 'FPS', 'Mean Frame Time (s)',
'% Dropped Frames', 'First Paint Time (s)'])
possible_browser = chrome_remote_control.FindBrowser(options)
with possible_browser.Create() as b:
for result in url_test.UrlTest(b, scroll.Scroll, ps):
if not result.DidScroll():
# Most likely the page was shorter than the window height.
logging.warning('Page did not scroll: %s', result.GetUrl())
continue
results_writer.writerow([result.GetUrl(), result.GetFps(0),
result.GetMeanFrameTime(0),
result.GetPercentBelow60Fps(0),
result.GetFirstPaintTime()])
sys.stdout.flush()
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