def RunAction(self, tab):
if not self.HasElementSelector():
self._element_function = 'document.body'
gesture_source_type = 'chrome.gpuBenchmarking.TOUCH_INPUT'
if (page_action.IsGestureSourceTypeSupported(tab, 'mouse') and
not self._use_touch):
gesture_source_type = 'chrome.gpuBenchmarking.MOUSE_INPUT'
code = js_template.Render(
"""
function(element, info) {
if (!element) {
throw Error('Cannot find element: ' + info);
}
window.__dragAction.start({
element: element,
left_start_ratio: {{ left_start_ratio }},
top_start_ratio: {{ top_start_ratio }},
left_end_ratio: {{ left_end_ratio }},
top_end_ratio: {{ top_end_ratio }},
speed: {{ speed }},
gesture_source_type: {{ @gesture_source_type }}
});
}""",
left_start_ratio=self._left_start_ratio,
top_start_ratio=self._top_start_ratio,
left_end_ratio=self._left_end_ratio,
top_end_ratio=self._top_end_ratio,
speed=self._speed,
gesture_source_type=gesture_source_type)
self.EvaluateCallback(tab, code)
tab.WaitForJavaScriptCondition('window.__dragActionDone', timeout=60)
def RunAction(self, tab):
code = js_template.Render(
"""
function(element, info) {
if (!element) {
throw Error('Cannot find element: ' + info);
}
window.__scrollBounceAction.start({
element: element,
left_start_ratio: {{ left_start_ratio }},
top_start_ratio: {{ top_start_ratio }},
direction: {{ direction }},
distance: {{ distance }},
overscroll: {{ overscroll }},
repeat_count: {{ repeat_count }},
speed: {{ speed }}
});
}""",
left_start_ratio=self._left_start_ratio,
top_start_ratio=self._top_start_ratio,
direction=self._direction,
distance=self._distance,
overscroll=self._overscroll,
repeat_count=self._repeat_count,
speed=self._speed)
page_action.EvaluateCallbackWithElement(
tab,
code,
selector=self._selector,
text=self._text,
element_function=self._element_function)
tab.WaitForJavaScriptCondition(
'window.__scrollBounceActionDone', timeout=60)
def __init__(self,
selector=None,
text=None,
element_function=None,
left_start_ratio=0.5,
top_start_ratio=0.5,
direction='down',
distance=None,
distance_expr=None,
speed_in_pixels_per_second=800,
use_touch=False,
synthetic_gesture_source=page_action.GESTURE_SOURCE_DEFAULT):
super(ScrollAction, self).__init__()
if direction not in ('down', 'up', 'left', 'right', 'downleft',
'downright', 'upleft', 'upright'):
raise page_action.PageActionNotSupported(
'Invalid scroll direction: %s' % self.direction)
self._selector = selector
self._text = text
self._element_function = element_function
self._left_start_ratio = left_start_ratio
self._top_start_ratio = top_start_ratio
self._direction = direction
self._speed = speed_in_pixels_per_second
self._use_touch = use_touch
self._synthetic_gesture_source = ('chrome.gpuBenchmarking.%s_INPUT' %
synthetic_gesture_source)
self._distance_func = js_template.RenderValue(None)
if distance:
assert not distance_expr
distance_expr = str(distance)
if distance_expr:
self._distance_func = js_template.Render(
'function() { return 0 + {{ @expr }}; }', expr=distance_expr)
def RunAction(self, tab):
if (self._selector is None and self._text is None
and self._element_function is None):
self._element_function = '(document.scrollingElement || document.body)'
code = js_template.Render("""
function(element, info) {
if (!element) {
throw Error('Cannot find element: ' + info);
}
window.__swipeAction.start({
element: element,
left_start_ratio: {{ left_start_ratio }},
top_start_ratio: {{ top_start_ratio }},
direction: {{ direction }},
distance: {{ distance }},
speed: {{ speed }}
});
}""",
left_start_ratio=self._left_start_ratio,
top_start_ratio=self._top_start_ratio,
direction=self._direction,
distance=self._distance,
speed=self._speed)
page_action.EvaluateCallbackWithElement(
tab,
code,
selector=self._selector,
text=self._text,
element_function=self._element_function)
tab.WaitForJavaScriptCondition('window.__swipeActionDone', timeout=60)
def WillRunAction(self, tab):
if self._selector:
element = js_template.Render(
'document.querySelector({{ selector }})', selector=self._selector)
else:
element = self._element_function
self._distance = tab.EvaluateJavaScript('''
(function(elem){
var rect = elem.getBoundingClientRect();
if (rect.bottom < 0) {
// The bottom of the element is above the viewport.
// Scroll up until the top of the element is on screen.
return rect.top - (window.innerHeight / 2);
}
if (rect.top - window.innerHeight >= 0) {
// rect.top provides the pixel offset of the element from the
// top of the page. Because that exceeds the viewport's height,
// we know that the element is below the viewport.
return rect.top - (window.innerHeight / 2);
}
return 0;
})({{ @element }});
''', element=element)
self._direction = 'down' if self._distance > 0 else 'up'
self._distance = abs(self._distance)
self._scroller = ScrollAction(
direction=self._direction,
selector=self._container_selector,
element_function=self._container_element_function,
distance=self._distance,
speed_in_pixels_per_second=self._speed)
def RunAction(self, tab):
if not self.HasElementSelector():
self._element_function = '(document.scrollingElement || document.body)'
gesture_source_type = self._synthetic_gesture_source
if self._use_touch:
gesture_source_type = 'chrome.gpuBenchmarking.TOUCH_INPUT'
code = js_template.Render("""
function(element, info) {
if (!element) {
throw Error('Cannot find element: ' + info);
}
window.__scrollAction.start({
element: element,
left_start_ratio: {{ left_start_ratio }},
top_start_ratio: {{ top_start_ratio }},
direction: {{ direction }},
speed: {{ speed }},
gesture_source_type: {{ @gesture_source_type }}
});
}""",
left_start_ratio=self._left_start_ratio,
top_start_ratio=self._top_start_ratio,
direction=self._direction,
speed=self._speed,
gesture_source_type=gesture_source_type)
self.EvaluateCallback(tab, code)
tab.WaitForJavaScriptCondition('window.__scrollActionDone',
timeout=self.timeout)
def RunAction(self, tab):
scale_factor = (self._scale_factor if self._scale_factor else
PinchAction._GetDefaultScaleFactorForPage(tab))
code = js_template.Render('''
function(element, info) {
if (!element) {
throw Error('Cannot find element: ' + info);
}
window.__pinchAction.start({
element: element,
left_anchor_ratio: {{ left_anchor_ratio }},
top_anchor_ratio: {{ top_anchor_ratio }},
scale_factor: {{ scale_factor }},
speed: {{ speed }}
});
}''',
left_anchor_ratio=self._left_anchor_ratio,
top_anchor_ratio=self._top_anchor_ratio,
scale_factor=scale_factor,
speed=self._speed)
page_action.EvaluateCallbackWithElement(
tab,
code,
selector=self._selector,
text=self._text,
element_function=self._element_function)
tab.WaitForJavaScriptExpression('window.__pinchActionDone', 60)
def EvaluateJavaScript(self, expression, **kwargs):
"""Returns the result of evaluating a given JavaScript expression.
Example: runner.ExecuteJavaScript('document.location.href');
Args:
expression: The expression to execute (provided as a string).
Optional keyword args:
timeout: The number of seconds to wait for the expression to evaluate.
context_id: The id of an iframe where to execute the code; the main page
has context_id=1, the first iframe context_id=2, etc.
user_gesture: Whether execution should be treated as initiated by user
in the UI. Code that plays media or requests fullscreen may not take
effects without user_gesture set to True.
Additional keyword arguments provide values to be interpolated within
the expression. See telemetry.util.js_template for details.
Raises:
py_utils.TimeoutException
exceptions.EvaluationException
exceptions.WebSocketException
exceptions.DevtoolsTargetCrashException
"""
# Use the default both when timeout=None or the option is ommited.
timeout = kwargs.pop('timeout', None) or 60
context_id = kwargs.pop('context_id', None)
user_gesture = kwargs.pop('user_gesture', None) or False
expression = js_template.Render(expression, **kwargs)
return self._EvaluateJavaScript(expression,
context_id,
timeout,
user_gesture=user_gesture)
def _DidLoadDocument(self, action_runner):
action_runner.Wait(2)
action_runner.ScrollPage()
action_runner.Wait(2)
action_runner.ScrollPage(direction='up')
# Refine search query in the search box.
# TODO(nednguyen): replace this with input text gesture to make it more
# realistic.
action_runner.ExecuteJavaScript(
js_template.Render(
'document.querySelector({{ selector }}).value += "वितरण";',
selector=self._SEARCH_BOX_SELECTOR))
action_runner.Wait(2)
action_runner.ClickElement(selector=self._SEARCH_BUTTON_SELECTOR)
# Scroll down & click next search result page.
action_runner.Wait(2)
action_runner.ScrollPageToElement(
selector=self._SEARCH_PAGE_2_SELECTOR)
action_runner.Wait(2)
action_runner.ClickElement(selector=self._SEARCH_PAGE_2_SELECTOR)
action_runner.Wait(2)
action_runner.ScrollPage()
def EvaluateJavaScript(self, expression, **kwargs):
"""Returns the result of evaluating a given JavaScript expression.
Example: runner.ExecuteJavaScript('document.location.href');
Args:
expression: The expression to execute (provided as a string).
Optional keyword args:
timeout: The number of seconds to wait for the expression to evaluate.
context_id: The id of an iframe where to execute the code; the main page
has context_id=1, the first iframe context_id=2, etc.
Additional keyword arguments provide values to be interpolated within
the expression. See telemetry.util.js_template for details.
Raises:
py_utils.TimeoutException
exceptions.EvaluationException
exceptions.WebSocketException
exceptions.DevtoolsTargetCrashException
"""
# Use the default both when timeout=None or the option is ommited.
timeout = kwargs.pop('timeout', None) or 60
context_id = kwargs.pop('context_id', None)
expression = js_template.Render(expression, **kwargs)
return self._EvaluateJavaScript(expression, context_id, timeout)
def ExecuteJavaScript(self, statement, **kwargs):
"""Executes a given JavaScript statement. Does not return the result.
Example: runner.ExecuteJavaScript('var foo = {{ value }};', value='hi');
Args:
statement: The statement to execute (provided as a string).
Optional keyword args:
timeout: The number of seconds to wait for the statement to execute.
context_id: The id of an iframe where to execute the code; the main page
has context_id=1, the first iframe context_id=2, etc.
Additional keyword arguments provide values to be interpolated within
the statement. See telemetry.util.js_template for details.
Raises:
py_utils.TimeoutException
exceptions.EvaluationException
exceptions.WebSocketException
exceptions.DevtoolsTargetCrashException
"""
# Use the default both when timeout=None or the option is ommited.
timeout = kwargs.pop('timeout', None) or 60
context_id = kwargs.pop('context_id', None)
statement = js_template.Render(statement, **kwargs)
self._runtime.Execute(statement, context_id, timeout)
def testRenderWithSpecialCharts(self):
self.assertEquals(
js_template.Render(
'function(elem) { return elem.find({{ selector }}); }',
selector='.r > a[href*="wikipedia"]'),
r'function(elem) { return elem.find(".r > a[href*=\"wikipedia\"]"); }'
)
def RunAction(self, tab):
if (self._selector is None and self._text is None
and self._element_function is None):
self._element_function = '(document.scrollingElement || document.body)'
gesture_source_type = self._synthetic_gesture_source
if self._use_touch:
gesture_source_type = 'chrome.gpuBenchmarking.TOUCH_INPUT'
code = js_template.Render('''
function(element, info) {
if (!element) {
throw Error('Cannot find element: ' + info);
}
window.__scrollAction.start({
element: element,
left_start_ratio: {{ left_start_ratio }},
top_start_ratio: {{ top_start_ratio }},
direction: {{ direction }},
speed: {{ speed }},
gesture_source_type: {{ @gesture_source_type }}
});
}''',
left_start_ratio=self._left_start_ratio,
top_start_ratio=self._top_start_ratio,
direction=self._direction,
speed=self._speed,
gesture_source_type=gesture_source_type)
page_action.EvaluateCallbackWithElement(
tab,
code,
selector=self._selector,
text=self._text,
element_function=self._element_function)
tab.WaitForJavaScriptExpression('window.__scrollActionDone', 60)
def RunAction(self, tab):
if not self.HasElementSelector():
self._element_function = 'document.body'
code = js_template.Render(
"""
function(element, errorMsg) {
if (!element) {
throw Error('Cannot find element: ' + errorMsg);
}
window.__tapAction.start({
element: element,
left_position_percentage: {{ left_position_percentage }},
top_position_percentage: {{ top_position_percentage }},
duration_ms: {{ duration_ms }},
gesture_source_type: {{ @gesture_source_type }}
});
}""",
left_position_percentage=self._left_position_percentage,
top_position_percentage=self._top_position_percentage,
duration_ms=self._duration_ms,
gesture_source_type=self._synthetic_gesture_source)
self.EvaluateCallback(tab, code)
# The second disjunct handles the case where the tap action leads to an
# immediate navigation (in which case the expression below might already be
# evaluated on the new page).
tab.WaitForJavaScriptCondition(
'window.__tapActionDone || window.__tapAction === undefined',
timeout=60)
def eventFired(self, selector, event):
# TODO(catapult:#3028): Render in JavaScript method when supported by API.
code = js_template.Render(
'window.__hasEventCompleted({{ selector }}, {{ event }});',
selector=selector,
event=event)
return self._tab.EvaluateJavaScript(code)
def DoActionOnWidgetType(self, action_runner, widget_type, action_function):
# Find all widgets of this type, but skip any that are disabled or are
# currently active as they typically don't produce animation frames.
element_list_query = js_template.Render(
'{{ @iframe }}.querySelectorAll({{ selector }})',
iframe=self.iframe_js,
selector='body %s:not([disabled]):not([active])' % widget_type)
roles_count_query = element_list_query + '.length'
for i in range(action_runner.EvaluateJavaScript(roles_count_query)):
element_query = js_template.Render(
'{{ @query }}[{{ i }}]', query=element_list_query, i=i)
if action_runner.EvaluateJavaScript(
element_query + '.offsetParent != null'):
# Only try to tap on visible elements (offsetParent != null)
action_runner.ExecuteJavaScript(element_query + '.scrollIntoView()')
action_runner.Wait(1) # wait for page to settle after scrolling
action_function(action_runner, element_query)
def __init__(self, url, page_set, name):
super(TodoMVCPage, self).__init__(
url=url, page_set=page_set, name=name,
shared_page_state_class=shared_page_state.SharedDesktopPageState)
# TODO(jochen): This interaction does not include the
# WindowProxy::initialize portion before the commit. To fix this, we'll
# have to migrate to TBMv2.
self.script_to_evaluate_on_commit = js_template.Render(
'console.time({{ label }});', label=INTERACTION_NAME)
def _DidLoadDocument(self, action_runner):
# Click on the amp news link and then just wait for it to load.
element_function = js_template.Render(
'document.querySelectorAll({{ selector }})[{{ index }}]',
selector=self.ITEM_SELECTOR,
index=0)
action_runner.WaitForElement(element_function=element_function)
action_runner.ClickElement(element_function=element_function)
action_runner.Wait(2)
def __init__(self, story_set, take_memory_measurement):
super(_FacebookDesktopStory, self).__init__(story_set,
take_memory_measurement)
self.script_to_evaluate_on_commit += "\n"
self.script_to_evaluate_on_commit += js_template.Render(
'''{{@events_reported_by_page}}
{{@performance_measure}}''',
events_reported_by_page=self.EVENTS_REPORTED_BY_PAGE,
performance_measure=self.PERFORMANCE_MEASURE_PATCH)
def __init__(self, page_set):
super(AdwordCampaignDesktopPage, self).__init__(
url='https://adwords.google.com/cm/CampaignMgmt',
page_set=page_set,
name='AdwordsCampaign',
credentials_path='data/credentials.json',
shared_page_state_class=shared_page_state.SharedDesktopPageState)
self.script_to_evaluate_on_commit = js_template.Render(
'console.time({{ label }});', label=INTERACTION_NAME)
def WaitForJavaScriptCondition(self, condition, **kwargs):
"""Wait for a JavaScript condition to become truthy.
Example: runner.WaitForJavaScriptCondition('window.foo == 10');
Args:
condition: The JavaScript condition (provided as string).
Optional keyword args:
timeout: The number in seconds to wait for the condition to become
True (default to 60).
context_id: The id of an iframe where to execute the code; the main page
has context_id=1, the first iframe context_id=2, etc.
Additional keyword arguments provide values to be interpolated within
the expression. See telemetry.util.js_template for details.
Returns:
The value returned by the JavaScript condition that got interpreted as
true.
Raises:
py_utils.TimeoutException
exceptions.EvaluationException
exceptions.WebSocketException
exceptions.DevtoolsTargetCrashException
"""
# Use the default both when timeout=None or the option is ommited.
timeout = kwargs.pop('timeout', None) or 60
context_id = kwargs.pop('context_id', None)
condition = js_template.Render(condition, **kwargs)
def IsJavaScriptExpressionTrue():
try:
return self._EvaluateJavaScript(condition, context_id, timeout)
except exceptions.EvaluationException:
# Eval may throw due to e.g. navigation.
return False
try:
return py_utils.WaitFor(IsJavaScriptExpressionTrue, timeout)
except py_utils.TimeoutException as e:
# Try to make timeouts a little more actionable by dumping console output.
debug_message = None
try:
debug_message = (
'Console output:\n%s' %
self.GetCurrentConsoleOutputBuffer())
except Exception as e: # pylint: disable=broad-except
debug_message = (
'Exception thrown when trying to capture console output: %s' %
repr(e))
# Rethrow with the original stack trace for better debugging.
raise py_utils.TimeoutException, \
py_utils.TimeoutException(
'Timeout after %ss while waiting for JavaScript:' % timeout +
condition + '\n' + e.message + '\n' + debug_message), \
sys.exc_info()[2]
def _NavigateToItem(self, action_runner, index):
item_selector = js_template.Render(
'document.querySelectorAll({{ selector }})[{{ index }}]',
selector=self.ITEM_SELECTOR, index=index)
# Only scrolls if element is not currently in viewport.
action_runner.WaitForElement(element_function=item_selector)
action_runner.ScrollPageToElement(
element_function=item_selector,
container_selector=self.CONTAINER_SELECTOR)
self._ClickLink(action_runner, item_selector)
def RunPageInteractions(self, action_runner):
sink_name = self._GetOSEnviron('RECEIVER_NAME')
# Wait for 5s after Chrome is opened in order to get consistent results.
action_runner.Wait(5)
with action_runner.CreateInteraction('flinging'):
self._WaitForResult(
action_runner,
lambda: action_runner.EvaluateJavaScript('initialized'),
'Failed to initialize',
timeout=30)
self.CloseExistingRoute(action_runner, sink_name)
# Start session
action_runner.TapElement(selector='#start_session_button')
self._WaitForResult(
action_runner,
lambda: len(action_runner.tab.browser.tabs) >= 2,
'MR dialog never showed up.')
for tab in action_runner.tab.browser.tabs:
# Choose sink
if tab.url == 'chrome://media-router/':
self.WaitUntilDialogLoaded(action_runner, tab)
self.ChooseSink(tab, sink_name)
self._WaitForResult(
action_runner,
lambda: action_runner.EvaluateJavaScript('currentSession'),
'Failed to start session',
timeout=10)
# Load Media
self.ExecuteAsyncJavaScript(
action_runner,
js_template.Render('loadMedia({{ url }});',
url=self._GetOSEnviron('VIDEO_URL')),
lambda: action_runner.EvaluateJavaScript('currentMedia'),
'Failed to load media',
timeout=120)
action_runner.Wait(5)
action_runner.ExecuteJavaScript('collectPerfData();')
action_runner.Wait(SESSION_TIME)
# Stop session
self.ExecuteAsyncJavaScript(
action_runner,
'stopSession();',
lambda: not action_runner.EvaluateJavaScript('currentSession'),
'Failed to stop session',
timeout=60,
retry=3)
def RunPageInteractions(self, action_runner):
sink_name = self._GetOSEnviron('RECEIVER_NAME')
# Enable Cast and start to discover all sinks.
action_runner.tab.EnableCast()
# Wait for 5s after Chrome is opened in order to get consistent results.
action_runner.Wait(5)
with action_runner.CreateInteraction('flinging'):
action_runner.tab.StopCasting(sink_name)
self._WaitForResult(
action_runner,
lambda: action_runner.EvaluateJavaScript('initialized'),
'Failed to initialize',
timeout=30)
# Wait for the sinks to appear.
self.WaitForSink(
action_runner, sink_name,
'Targeted receiver "%s" did not showed up. Sink List: %s' %
(sink_name, str(action_runner.tab.GetCastSinks())))
action_runner.tab.SetCastSinkToUse(sink_name)
# Start session
action_runner.TapElement(selector='#start_session_button')
action_runner.Wait(WAIT_TIME_SEC)
self._WaitForResult(
action_runner,
lambda: action_runner.EvaluateJavaScript('currentSession'),
'Failed to start session',
timeout=WAIT_TIME_SEC)
# Load Media
self.ExecuteAsyncJavaScript(
action_runner,
js_template.Render('loadMedia({{ url }});',
url=self._GetOSEnviron('VIDEO_URL')),
lambda: action_runner.EvaluateJavaScript('currentMedia'),
'Failed to load media',
timeout=120)
action_runner.Wait(5)
action_runner.ExecuteJavaScript('collectPerfData();')
action_runner.Wait(SESSION_WAIT_TIME)
# Stop session
self.ExecuteAsyncJavaScript(
action_runner,
'stopSession();',
lambda: not action_runner.EvaluateJavaScript('currentSession'),
'Failed to stop session',
timeout=60,
retry=3)
def HasEventCompletedOrError(self, tab, selector, event_name):
# TODO(catapult:#3028): Render in JavaScript method when supported by API.
code = js_template.Render(
'window.__hasEventCompleted({{ selector }}, {{ event_name }});',
selector=selector, event_name=event_name)
if tab.EvaluateJavaScript(code):
return True
error = tab.EvaluateJavaScript('window.__error')
if error:
logging.error('Detected media error while waiting for %s: %s', event_name,
error)
return True
return False
def _DidLoadDocument(self, action_runner):
# Waiting manually for the search results to load here and below.
# Telemetry's action_runner.WaitForNavigate has some difficulty with amp
# pages as it waits for a frameId without a parent id.
action_runner.Wait(2)
# Click on the yahoo amp link and then just wait for it to load.
element_function = js_template.Render(
'document.querySelectorAll({{ selector }})[{{ index }}]',
selector=self.ITEM_SELECTOR,
index=0)
action_runner.WaitForElement(element_function=element_function)
action_runner.ClickElement(element_function=element_function)
# Waiting for the document to fully render
action_runner.Wait(2)
def ExecuteJavaScript(self, statement, **kwargs):
"""Executes a given JavaScript expression. Does not return the result.
Example: runner.ExecuteJavaScript('var foo = {{ value }};', value=1);
Args:
statement: The statement to execute (provided as string).
**kwargs: Additional keyword arguments are interpolated within the
statement. See telemetry.util.js_template for details.
Raises:
EvaluationException: The statement failed to execute.
"""
self._tab.ExecuteJavaScript(js_template.Render(statement, **kwargs))
def RunAction(self, tab):
# TODO(catapult:#3028): Render in JavaScript method when supported by API.
code = js_template.Render(
'window.__loadMediaAndAwait({{ selector }}, {{ event }});',
selector=self._selector, event=self._event_to_await)
try:
tab.ExecuteJavaScript(code)
if self._timeout_in_seconds > 0:
self.WaitForEvent(tab, self._selector, self._event_to_await,
self._timeout_in_seconds)
except exceptions.EvaluateException:
raise page_action.PageActionFailed('Failed waiting for event "%s" on '
'elements with selector = %s.' %
(self._event_to_await, self._selector))
def RunAction(self, tab):
# TODO(catapult:#3028): Render in JavaScript method when supported by API.
code = js_template.Render(
'window.__loopMedia({{ selector }}, {{ loop_count }});',
selector=self._selector,
loop_count=self._loop_count)
try:
tab.ExecuteJavaScript(code)
if self._timeout_in_seconds > 0:
self.WaitForEvent(tab, self._selector, 'loop',
self._timeout_in_seconds)
except exceptions.EvaluateException:
raise page_action.PageActionFailed(
'Cannot loop media element(s) with '
'selector = %s.' % self._selector)
def WaitForJavaScriptCondition(self, condition, **kwargs):
"""Wait for a JavaScript condition to become true.
Example: runner.WaitForJavaScriptCondition('window.foo == 10');
Args:
condition: The JavaScript condition (as string).
timeout_in_seconds: The timeout in seconds (default to 60).
**kwargs: Additional keyword arguments are interpolated within the
statement. See telemetry.util.js_template for details.
"""
timeout = kwargs.get('timeout_in_seconds', 60)
self._tab.WaitForJavaScriptExpression(js_template.Render(
condition, **kwargs),
timeout=timeout)
