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screenshot.coffee
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screenshot.coffee
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_ = require("lodash")
$ = require("jquery")
bytes = require("bytes")
Promise = require("bluebird")
$Screenshot = require("../../cypress/screenshot")
$dom = require("../../dom")
$errUtils = require("../../cypress/error_utils")
getViewportHeight = (state) ->
## TODO this doesn't seem correct
Math.min(state("viewportHeight"), window.innerHeight)
getViewportWidth = (state) ->
Math.min(state("viewportWidth"), window.innerWidth)
automateScreenshot = (state, options = {}) ->
{ runnable, timeout } = options
titles = []
## if this a hook then push both the current test title
## and our own hook title
if runnable.type is "hook"
if runnable.ctx and (ct = runnable.ctx.currentTest)
titles.push(ct.title, runnable.title)
else
titles.push(runnable.title)
getParentTitle = (runnable) ->
if p = runnable.parent
if t = p.title
titles.unshift(t)
getParentTitle(p)
getParentTitle(runnable)
props = _.extend({
titles
testId: runnable.id
testAttemptIndex: $utils.getTestFromRunnable(runnable)._currentRetry
takenPaths: state("screenshotPaths")
}, _.omit(options, "runnable", "timeout", "log", "subject"))
automate = ->
Cypress.automation("take:screenshot", props)
if not timeout
automate()
else
## need to remove the current timeout
## because we're handling timeouts ourselves
cy.clearTimeout("take:screenshot")
automate()
.timeout(timeout)
.catch (err) ->
$errUtils.throwErr(err, { onFail: options.log })
.catch Promise.TimeoutError, (err) ->
$errUtils.throwErrByPath "screenshot.timed_out", {
onFail: options.log
args: { timeout }
}
scrollOverrides = (win, doc) ->
originalOverflow = doc.documentElement.style.overflow
originalBodyOverflowY = doc.body.style.overflowY
originalX = win.scrollX
originalY = win.scrollY
## overflow-y: scroll can break `window.scrollTo`
if doc.body
doc.body.style.overflowY = "visible"
## hide scrollbars
doc.documentElement.style.overflow = "hidden"
return ->
doc.documentElement.style.overflow = originalOverflow
if doc.body
doc.body.style.overflowY = originalBodyOverflowY
win.scrollTo(originalX, originalY)
validateNumScreenshots = (numScreenshots, automationOptions) ->
if numScreenshots < 1
$errUtils.throwErrByPath("screenshot.invalid_height", {
log: automationOptions.log
})
takeScrollingScreenshots = (scrolls, win, state, automationOptions) ->
scrollAndTake = ({ y, clip, afterScroll }, index) ->
win.scrollTo(0, y)
if afterScroll
clip = afterScroll()
options = _.extend({}, automationOptions, {
current: index + 1
total: scrolls.length
clip: clip
})
automateScreenshot(state, options)
Promise
.mapSeries(scrolls, scrollAndTake)
.then(_.last)
takeFullPageScreenshot = (state, automationOptions) ->
win = state("window")
doc = state("document")
resetScrollOverrides = scrollOverrides(win, doc)
docHeight = $(doc).height()
viewportHeight = getViewportHeight(state)
numScreenshots = Math.ceil(docHeight / viewportHeight)
validateNumScreenshots(numScreenshots, automationOptions)
scrolls = _.map _.times(numScreenshots), (index) ->
y = viewportHeight * index
clip = if index + 1 is numScreenshots
heightLeft = docHeight - (viewportHeight * index)
{
x: automationOptions.clip.x
y: viewportHeight - heightLeft
width: automationOptions.clip.width
height: heightLeft
}
else
automationOptions.clip
{ y, clip }
takeScrollingScreenshots(scrolls, win, state, automationOptions)
.finally(resetScrollOverrides)
applyPaddingToElementPositioning = (elPosition, automationOptions) ->
if not automationOptions.padding
return elPosition
[ paddingTop, paddingRight, paddingBottom, paddingLeft ] = automationOptions.padding
return {
width: elPosition.width + paddingLeft + paddingRight
height: elPosition.height + paddingTop + paddingBottom
fromElViewport: {
top: elPosition.fromElViewport.top - paddingTop
left: elPosition.fromElViewport.left - paddingLeft
bottom: elPosition.fromElViewport.bottom + paddingBottom
}
fromElWindow: {
top: elPosition.fromElWindow.top - paddingTop
}
}
takeElementScreenshot = ($el, state, automationOptions) ->
win = state("window")
doc = state("document")
resetScrollOverrides = scrollOverrides(win, doc)
elPosition = applyPaddingToElementPositioning(
$dom.getElementPositioning($el),
automationOptions
)
viewportHeight = getViewportHeight(state)
viewportWidth = getViewportWidth(state)
numScreenshots = Math.ceil(elPosition.height / viewportHeight)
validateNumScreenshots(numScreenshots, automationOptions)
scrolls = _.map _.times(numScreenshots), (index) ->
y = elPosition.fromElWindow.top + (viewportHeight * index)
afterScroll = ->
elPosition = applyPaddingToElementPositioning(
$dom.getElementPositioning($el),
automationOptions
)
x = Math.min(viewportWidth, elPosition.fromElViewport.left)
width = Math.min(viewportWidth - x, elPosition.width)
if numScreenshots is 1
return {
x: x
y: elPosition.fromElViewport.top
width: width
height: elPosition.height
}
if index + 1 is numScreenshots
overlap = (numScreenshots - 1) * viewportHeight + elPosition.fromElViewport.top
heightLeft = elPosition.fromElViewport.bottom - overlap
return {
x: x
y: overlap
width: width
height: heightLeft
}
return {
x: x
y: Math.max(0, elPosition.fromElViewport.top)
width: width
## TODO: try simplifying to just 'viewportHeight'
height: Math.min(viewportHeight, elPosition.fromElViewport.top + elPosition.height)
}
{ y, afterScroll }
takeScrollingScreenshots(scrolls, win, state, automationOptions)
.finally(resetScrollOverrides)
## "app only" means we're hiding the runner UI
isAppOnly = ({ capture }) ->
capture is "viewport" or capture is "fullPage"
getShouldScale = ({ capture, scale }) ->
if isAppOnly({ capture }) then scale else true
getBlackout = ({ capture, blackout }) ->
if isAppOnly({ capture }) then blackout else []
takeScreenshot = (Cypress, state, screenshotConfig, options = {}) ->
{
capture
padding
clip
disableTimersAndAnimations
onBeforeScreenshot
onAfterScreenshot
} = screenshotConfig
{ subject, runnable, name } = options
startTime = new Date()
send = (event, props, resolve) ->
Cypress.action("cy:#{event}", props, resolve)
sendAsync = (event, props) ->
new Promise (resolve) ->
send(event, props, resolve)
getOptions = (isOpen) ->
{
id: runnable.id
testAttemptIndex: $utils.getTestFromRunnable(runnable)._currentRetry
isOpen: isOpen
appOnly: isAppOnly(screenshotConfig)
scale: getShouldScale(screenshotConfig)
waitForCommandSynchronization: not isAppOnly(screenshotConfig)
disableTimersAndAnimations: disableTimersAndAnimations
blackout: getBlackout(screenshotConfig)
}
before = ->
if disableTimersAndAnimations
cy.pauseTimers(true)
sendAsync("before:screenshot", getOptions(true))
after = ->
send("after:screenshot", getOptions(false))
if disableTimersAndAnimations
cy.pauseTimers(false)
automationOptions = _.extend({}, options, {
capture
clip: {
x: 0
y: 0
width: getViewportWidth(state)
height: getViewportHeight(state)
}
padding
userClip: clip
viewport: {
width: window.innerWidth
height: window.innerHeight
}
scaled: getShouldScale(screenshotConfig)
blackout: getBlackout(screenshotConfig)
startTime: startTime.toISOString()
})
## use the subject as $el or yield the wrapped documentElement
$el = if $dom.isElement(subject)
subject
else
$dom.wrap(state("document").documentElement)
before()
.then ->
onBeforeScreenshot and onBeforeScreenshot.call(state("ctx"), $el)
$Screenshot.onBeforeScreenshot($el)
switch
when $dom.isElement(subject)
takeElementScreenshot($el, state, automationOptions)
when capture is "fullPage"
takeFullPageScreenshot(state, automationOptions)
else
automateScreenshot(state, automationOptions)
.then (props) ->
onAfterScreenshot and onAfterScreenshot.call(state("ctx"), $el, props)
$Screenshot.onAfterScreenshot($el, props)
return props
.finally(after)
module.exports = (Commands, Cypress, cy, state, config) ->
## failure screenshot when not interactive
Cypress.on "runnable:after:run:async", (test, runnable) ->
screenshotConfig = $Screenshot.getConfig()
return if not test.err or not screenshotConfig.screenshotOnRunFailure or config("isInteractive") or test.err.isPending
## if a screenshot has not been taken (by cy.screenshot()) in the test
## that failed, we can bypass UI-changing and pixel-checking (simple: true)
## otheriwse, we need to do all the standard checks
## to make sure the UI is in the right place (simple: false)
screenshotConfig.capture = "runner"
takeScreenshot(Cypress, state, screenshotConfig, {
runnable
simple: !state("screenshotTaken")
testFailure: true
timeout: config("responseTimeout")
})
Commands.addAll({ prevSubject: ["optional", "element", "window", "document"] }, {
screenshot: (subject, name, userOptions = {}) ->
if _.isObject(name)
userOptions = name
name = null
withinSubject = state("withinSubject")
if withinSubject and $dom.isElement(withinSubject)
subject = withinSubject
## TODO: handle hook titles
runnable = state("runnable")
options = _.defaults {}, userOptions, {
log: true
timeout: config("responseTimeout")
}
isWin = $dom.isWindow(subject)
screenshotConfig = _.pick(options, "capture", "scale", "disableTimersAndAnimations", "blackout", "waitForCommandSynchronization", "padding", "clip", "onBeforeScreenshot", "onAfterScreenshot")
screenshotConfig = $Screenshot.validate(screenshotConfig, "screenshot", options._log)
screenshotConfig = _.extend($Screenshot.getConfig(), screenshotConfig)
## set this regardless of options.log b/c its used by the
## yielded value below
consoleProps = _.omit(screenshotConfig, "scale", "screenshotOnRunFailure")
consoleProps = _.extend(consoleProps, {
scaled: getShouldScale(screenshotConfig)
blackout: getBlackout(screenshotConfig)
})
if name
consoleProps.name = name
if options.log
options._log = Cypress.log({
message: name
consoleProps: ->
consoleProps
})
if not isWin and subject and subject.length > 1
$errUtils.throwErrByPath("screenshot.multiple_elements", {
log: options._log
args: { numElements: subject.length }
})
if $dom.isElement(subject)
screenshotConfig.capture = "viewport"
state("screenshotTaken", true)
takeScreenshot(Cypress, state, screenshotConfig, {
name
subject
runnable
log: options._log
timeout: options.timeout
})
.then (props) ->
{ duration, path, size } = props
{ width, height } = props.dimensions
takenPaths = state("screenshotPaths") or []
state("screenshotPaths", takenPaths.concat([path]))
_.extend(consoleProps, props, {
size: bytes(size, { unitSeparator: " " })
duration: "#{duration}ms"
dimensions: "#{width}px x #{height}px"
})
if subject
consoleProps.subject = subject
return subject
})