Coding Mode (evaluating as a JS-expression)

Include calculations and JavaScript features in your scenarios 🧠

You have the option to enable or disable JavaScript evaluation in scenario steps (ECMAScript 5.1):

Turning On/Off JS evaluation in scenario steps

Please note that if you enable this option and make a syntax mistake, the scenario will pause with an exception message.

Checking expressions

You can verify the result of your expression by clicking the "Check the expression" link. You'll need to provide an object ID for validation.

Don't mix "Check the expression" feature with step testing.

Checking the expression providing an object with ID=1

Examples of JavaScript expressions

Expression	🅾️ JS-interpreter is off	✅ JS-interpreter is on
{{a}} +1 // {{a}} = 3	3 + 1	4
Math.random()	Math.random()	0.4353 // some random value 0.0–1.0
Today +1 day and similar expressions	Today +1 day	2020-05-04T00:00:00.000Z // today at 00:00
'{{a}}'.length // {{a}} == hello world	'hello world'.length	12
'{{a}}'.length // {{a}} == 1,-12,hello (array type)	'1,12,hello'.length	11 // Note! It evaluates as a string. Learn how to deal with arrays

Don't forget to enclose '{{fields}}' in quotes if you want them to be processed as strings.

Other resources

• MDN JavaScript Guide - Get a high-level overview of fundamental JavaScript concepts.

• Codecademy Introduction to JavaScript - Learn JavaScript in this free online course with interactive lessons.