// enter the test data here

var grossAmount = 121.84

​

// compute tax

var taxPercent = 0.06 // 6% expressed in decimals

var expectedTaxAmount = grossAmount * taxPercent // compute tax amount

expectedTaxAmount = (expectedTaxAmount).toFixed(2) // round to 2 decimal places

​

// go to our test web page

I.goTo("https://example.uilicious.com/gst_calculator.html")

​

// enter the gross amount

I.fill("gross amount", "" + grossAmount)

​

// grab the value of the tax amount from the webpage

var TAX_AMOUNT_INPUT_FIELD = "#tax-amount"

var actualTaxAmount = I.getValue(TAX_AMOUNT_INPUT_FIELD) // use I.getValue to read the value from an input field and store it to a variable `actualTaxAmount`

​

// assert the value of the field

TEST.assert(

  expectedTaxAmount === actualTaxAmount, // condition that we want to test

  `Expect tax to be ${expectedTaxAmount}, got ${actualTaxAmount}.`

)

​

// TEST.assert is a short-hand for writing the following:

/*

if(expectedTaxAmount === actualTaxAmount){

  TEST.log.success(`Expect tax to be ${expectedTaxAmount}, got ${actualTaxAmount}.`)

} else {

  TEST.log.fail(`Expect tax to be ${expectedTaxAmount}, got ${actualTaxAmount}.`)

}

*/

​