Chain types

This part of user documentation is describing an obsolete version 2.5.* (or older) of Suitest JavaScript API and is meant only for users who have not yet switched to the version 3. If you are new to Suitest JavaScript API, please use the version 3 instead.

In JavaScript API you create chains of assertions or operations which allow you to test on a subject within your application. We have separated our chains in to three different types - Assertion, Evaluation and Query chains.


Let's take a look at a simple assertion chain:

await suitest.assert.element('elementApiID').exists();

An assertion chain is made up of an assert, subject (in this case element and some chain modifier (in this case exists). The readability and structure of the code should be straight forward. In this example we ask Suitest "check if the element with 'elementApiID' exists", Suitest will then return the chain outcome meaning if the assertion passes or fails.

// Assertion chain examples:

// Element - if it exists or does not
await suitest.assert.element('logo').exists();
await suitest.assert.element('login').doesNot().exist();

// Cookie - if it exists and its value
await suitest.assert.cookie('_ga').exists();
await suitest.assert.cookie('_gid').equals('12345');

// Network request - https url was requested
await suitest.assert.networkRequest().equal('').wasMade();

Lear more about assertions in Suitest.

Assertion outcome

The chain resolves to no value if the assertion passes, if it is rejected then an AssertionError is thrown.


Chains without the assert assertion look just like the example below.

const elementExists = await suitest.element('elementApiID').exists();

Heads up: You can convert any evaluation chain that does not contain assert to an assertion line by simply adding toAssert() at the end of the chain.

Evaluation outcome

These types of chains resolve to a boolean value and if the chain passes true otherwise false.


A couple special chains return useful values that you may want to use during testing. These chains are created without any additional chain modifiers.

Using the cookie subject, you can check for a particular cookie and gather its value. The value is returned as a string if the cookie is found. If it is not found then undefined will be returned.

const cookieValue = await suitest.cookie('my-cookie');


Using the element subject, you can get element properties which are returned as an object. If the element is not found then undefined will be returned.

const elementProps = await suitest.element('my-element');


Using the jsExpression subject, you can evaluate a JavaScript expression which returns a string with the result of your expression.

const jsExpressionResult = await suitest.jsExpression('1+2');


Using the location subject, you can check the current location of the app which is returned as a string that contains the current location.

const currentLocation = await suitest.location();

Cloning chains (clone())

You can clone() chains, as they are for one time execution only. For example:

const chain =;
await chain;
await chain;

The code above would only press the button once, as the Promise is already resolved. To have this chain execute twice, you can use .clone(). For example:

const chain =;
await chain;
await chain.clone(); // would execute the chain again