1 # Copyright 2014 The Chromium Authors. All rights reserved. 2 # Use of this source code is governed by a BSD-style license that can be 3 # found in the LICENSE file. 4 import os 5 6 from telemetry.page import page_test 7 from telemetry.page import page_test 8 from telemetry.value import scalar 9 10 11 class Screenshot(page_test.PageTest): 12 def __init__(self): 13 super(Screenshot, self).__init__( 14 action_name_to_run = 'RunPrepareForScreenshot', 15 is_action_name_to_run_optional=True) 16 17 @classmethod 18 def AddCommandLineArgs(cls, parser): 19 parser.add_option('--png-outdir', 20 help='Output directory for the PNG files') 21 22 @classmethod 23 def ProcessCommandLineArgs(cls, parser, args): 24 if not args.png_outdir: 25 parser.error('Please specify --png-outdir') 26 cls._png_outdir = args.png_outdir 27 28 def ValidateAndMeasurePage(self, page, tab, results): 29 if not tab.screenshot_supported: 30 raise page_test.TestNotSupportedOnPlatformFailure( 31 'Browser does not support screenshotting') 32 33 tab.WaitForDocumentReadyStateToBeComplete() 34 screenshot = tab.Screenshot(60) 35 36 outpath = os.path.abspath( 37 os.path.join(self._png_outdir, page.file_safe_name)) + '.png' 38 39 if os.path.exists(outpath): 40 previous_mtime = os.path.getmtime(outpath) 41 else: 42 previous_mtime = -1 43 44 screenshot.WritePngFile(outpath) 45 46 saved_picture_count = 0 47 if os.path.exists(outpath) and os.path.getmtime(outpath) > previous_mtime: 48 saved_picture_count = 1 49 results.AddValue(scalar.ScalarValue( 50 results.current_page, 'saved_picture_count', 'count', 51 saved_picture_count)) 52
