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- telemetry.page.page_test.Failure(exceptions.Exception)
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- MeasurementFailure
- telemetry.page.page_test.PageTest(__builtin__.object)
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- PageMeasurement
class PageMeasurement(telemetry.page.page_test.PageTest) |
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Glue code for running a measurement across a set of pages.
To use this, subclass from the measurement and override MeasurePage. For
example:
class BodyChildElementMeasurement(PageMeasurement):
def MeasurePage(self, page, tab, results):
body_child_count = tab.EvaluateJavaScript(
'document.body.children.length')
results.Add('body_children', 'count', body_child_count)
if __name__ == '__main__':
page_measurement.Main(BodyChildElementMeasurement())
To add test-specific options:
class BodyChildElementMeasurement(PageMeasurement):
def AddCommandLineOptions(parser):
parser.add_option('--element', action='store', default='body')
def MeasurePage(self, page, tab, results):
body_child_count = tab.EvaluateJavaScript(
'document.querySelector('%s').children.length')
results.Add('children', 'count', child_count) |
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- Method resolution order:
- PageMeasurement
- telemetry.page.page_test.PageTest
- __builtin__.object
Methods defined here:
- AddOutputOptions(self, parser)
- MeasurePage(self, page, tab, results)
- Override to actually measure the page's performance.
page is a page_set.Page
tab is an instance of telemetry.core.Tab
Should call results.Add(name, units, value) for each result, or raise an
exception on failure. The name and units of each Add() call must be
the same across all iterations. The name 'url' must not be used.
Prefer field names that are in accordance with python variable style. E.g.
field_name.
Put together:
def MeasurePage(self, page, tab, results):
res = tab.EvaluateJavaScript('2+2')
if res != 4:
raise Exception('Oh, wow.')
results.Add('two_plus_two', 'count', res)
- PrepareResults(self, options)
- __init__(self, action_name_to_run='', needs_browser_restart_after_each_run=False, discard_first_result=False, clear_cache_before_each_run=False)
Data descriptors defined here:
- output_format_choices
- results_are_the_same_on_every_page
- By default, measurements are assumed to output the same values for every
page. This allows incremental output, for example in CSV. If, however, the
measurement discovers what values it can report as it goes, and those values
may vary from page to page, you need to override this function and return
False. Output will not appear in this mode until the entire pageset has
run.
Methods inherited from telemetry.page.page_test.PageTest:
- AddCommandLineOptions(self, parser)
- Override to expose command-line options for this test.
The provided parser is an optparse.OptionParser instance and accepts all
normal results. The parsed options are available in Run as
self.options.
- CanRunForPage(self, page)
- Override to customize if the test can be ran for the given page.
- CreatePageSet(self, args, options)
- Override to make this test generate its own page set instead of
allowing arbitrary page sets entered from the command-line.
- CustomizeBrowserOptions(self, options)
- Override to add test-specific options to the BrowserOptions object
- CustomizeBrowserOptionsForPage(self, page, options)
- Add options specific to the test and the given page.
- DidNavigateToPage(self, page, tab)
- Override to do operations right after the page is navigated, but before
any waiting for completion has occurred.
- DidRunAction(self, page, tab, action)
- Override to do operations after running the action on the page.
- DidRunPageSet(self, tab, results)
- Override to do operations after page set is completed, but before browser
is torn down.
- DidStartHTTPServer(self, tab)
- Override to do operations after the HTTP server is started.
- NeedsBrowserRestartAfterEachRun(self, tab)
- Override to specify browser restart after each run.
- Run(self, options, page, tab, results)
- SetUpBrowser(self, browser)
- Override to customize the browser right after it has launched.
- WillNavigateToPage(self, page, tab)
- Override to do operations before the page is navigated.
- WillRunAction(self, page, tab, action)
- Override to do operations before running the action on the page.
- WillRunPageSet(self, tab)
- Override to do operations before the page set is navigated.
Data descriptors inherited from telemetry.page.page_test.PageTest:
- __dict__
- dictionary for instance variables (if defined)
- __weakref__
- list of weak references to the object (if defined)
- action_name_to_run
- clear_cache_before_each_run
- When set to True, the browser's disk and memory cache will be cleared
before each run.
- discard_first_result
- When set to True, the first run of the test is discarded. This is
useful for cases where it's desirable to have some test resource cached so
the first run of the test can warm things up.
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