Expect

Method allowing to assert a value.

Parameter	Type	Description
actual	any
options	AssertOptions	Method options.

AssertOptions

Parameter	Type	Description
interval	number	Time interval between retries in milliseconds.
timeout	number	Timeout of the method.
retries	number	Number of retries.
backoff	FIXED / EXPONENTIAL / LINEAR	Value used to determine the wait time between successive retries.
maxBackOff	number	Maximum value of the backoff.
errorMessage	string	Error message.
overrideErrorMessage	string	Override the Test Maker error message.
retryMessage	string	Retry message.
soft	boolean	Assertion is soft assertion (does not stop test execution).

How to use the expect method to assert:

const inputValue = `hello world`;

await I.expect(inputValue).toEqual(`hello world`);

The above is really a simple form of assertion, and it should pass, because the input value equals the value with expect in the toEqual Assertion.

Now what would happen if we pass a wrong value?

const inputValue = `hella mold`;

await I.expect(inputValue).toEqual(`hello world`);

​ The test will fail, because obviously, hella mold does not equal hello world. You should see something similar to the image below as the Error Details:

Test Maker have a powerful reporting system, and if you look carefully at the image above you would see that Test Maker is giving you lots of information on why that Assertion failed.

On top of that Test Maker Assertion API has a Diffing system, which gives the difference between the received and expected value.