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[yaffs-website] / node_modules / phantomjs-prebuilt / lib / phantom / examples / waitfor.js

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