"use strict"; function waitForCondition(condition, nextTest, errorMsg) { var tries = 0; var interval = setInterval(function() { if (tries >= 30) { ok(false, errorMsg); moveOn(); } var conditionPassed; try { conditionPassed = condition(); } catch (e) { ok(false, e + "\n" + e.stack); conditionPassed = false; } if (conditionPassed) { moveOn(); } tries++; }, 100); var moveOn = function() { clearInterval(interval); nextTest(); }; }