casper: Add waitForSelectorText.

Fixes zulip#1110
ghisvail · Jun 7, 2017 · e4f6f53 · e4f6f53
1 parent 9ebb503
commit e4f6f53
Showing 1 changed file with 16 additions and 0 deletions.
diff --git a/frontend_tests/casper_lib/common.js b/frontend_tests/casper_lib/common.js
@@ -1,3 +1,4 @@
+var util = require("util");
 var REALMS_HAVE_SUBDOMAINS = casper.cli.get('subdomains');
 var common = (function () {
 
@@ -74,6 +75,21 @@ exports.initialize_casper = function () {
         });
     });
 
+    // This function should always be enclosed within a then() otherwise
+    // it might not exist on casper object.
+    casper.waitForSelectorText = function (selector, text, then, onTimeout, timeout) {
+        this.waitForSelector(selector, function _then() {
+            this.waitFor(function _check() {
+                var content = this.fetchText(selector);
+                if (util.isRegExp(text)) {
+                    return text.test(content);
+                }
+                return content.indexOf(text) !== -1;
+            }, then, onTimeout, timeout);
+        }, onTimeout, timeout);
+        return this;
+    };
+
     casper.evaluate(function () {
         window.localStorage.clear();
     });