mirror of https://github.com/vitalif/phantomjs
49 lines
2.2 KiB
CoffeeScript
49 lines
2.2 KiB
CoffeeScript
##
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# Wait until the test condition is true or a timeout occurs. Useful for waiting
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# on a server response or for a ui change (fadeIn, etc.) to occur.
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#
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# @param testFx javascript condition that evaluates to a boolean,
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# it can be passed in as a string (e.g.: "1 == 1" or "$('#bar').is(':visible')" or
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# as a callback function.
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# @param onReady what to do when testFx condition is fulfilled,
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# it can be passed in as a string (e.g.: "1 == 1" or "$('#bar').is(':visible')" or
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# as a callback function.
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# @param timeOutMillis the max amount of time to wait. If not specified, 3 sec is used.
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##
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waitFor = (testFx, onReady, timeOutMillis=3000) ->
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start = new Date().getTime()
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condition = false
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f = ->
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if (new Date().getTime() - start < timeOutMillis) and not condition
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# If not time-out yet and condition not yet fulfilled
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condition = (if typeof testFx is 'string' then eval testFx else testFx()) #< defensive code
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else
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if not condition
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# If condition still not fulfilled (timeout but condition is 'false')
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console.log "'waitFor()' timeout"
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phantom.exit 1
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else
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# Condition fulfilled (timeout and/or condition is 'true')
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console.log "'waitFor()' finished in #{new Date().getTime() - start}ms."
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if typeof onReady is 'string' then eval onReady else onReady() #< Do what it's supposed to do once the condition is fulfilled
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clearInterval interval #< Stop this interval
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interval = setInterval f, 250 #< repeat check every 250ms
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page = require('webpage').create()
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# Open Twitter on 'sencha' profile and, onPageLoad, do...
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page.open 'http://twitter.com/#!/sencha', (status) ->
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# Check for page load success
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if status isnt 'success'
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console.log 'Unable to access network'
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else
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# Wait for 'signin-dropdown' to be visible
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waitFor ->
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# Check in the page if a specific element is now visible
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page.evaluate ->
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$('#signin-dropdown').is ':visible'
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, ->
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console.log 'The sign-in dialog should be visible now.'
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phantom.exit()
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