How to use then() and get the value in Cypress-CodePudding

I have a span element which value is 2. I would like to check if the value is greater than 0, but after checked online and implemented every method, it did not work...

Here is the console when I log the $span

I understand that Cypress works asynchronously, so I use .then() to get the text of element. How can I get the value of 2 and do the follow if-else?

HTML

<div>
  <span class="badge ml-1 badge-primary">2</span>
</div>

   cy.get(".badge.ml-1.badge-primary").then(($span)=> {
     if($span.text().includes(0)) {
      doFunction1()
    } else {
      cy.get(xxxxx)
    }
 )}

CodePudding user response：

Do it by chaining conversions methods to go from from element -> text -> number

cy.get(".badge.ml-1.badge-primary")
  .invoke('text')                    // to text
  .then(text =>  text)               // to number
  .then(value => {
    if(value > 0) { 
      doFunction1()
    } else {
      cy.get(xxxxx)
    }
  })

Waiting for value 2

cy.get(".badge.ml-1.badge-primary")
  .invoke('text')                    // to text
  .then(text =>  text)               // to number
  .should('eq', 2)                   // wait for value 2
  .then(() => {
    doFunction1()                    // now doFunction
  })

CodePudding user response：

What you asked for is to check if content of a span is GRATER THAN 0. So it will require some additional apprach than using includes. For example you may read a value as a variable and check if it is grater than 0:

 cy.get(".badge.ml-1.badge-primary").then(($span)=> {
     const value = $span.text(); // now you know what the value is
     if(value > 0) { // actual check if > 0. Beware, implicit coersion here! read more below.
      doFunction1()
    } else {
      cy.get(xxxxx)
    }
 )}

The value variable, however, is a string. My code works since JS would convert string to number automatically. Depending on your use-case, you might want to make sure it is a valid number and not some other string, which can't be converted to a number (like "2s"). For example, if the value is "2s", than the value > 0 check would be falsy, which might result in a bug in your code.

 cy.get(".badge.ml-1.badge-primary").then(($span)=> {
     const value = Number.parseInt($span.text()); // now you know what the value is
     if(!Number.isNaN(value) && value > 0) { // value is now of type number, but it may be NaN! (yes, NaN is also a number)
      doFunction1()
    } else {
      cy.get(xxxxx)
    }
 )}

CodePudding user response：

First make sure that the selector that you are using is unique, so that is shouldn't fetch an unintended value. Secondly you can wait with a custom timeout in case your webpage takes some time to populate the value and then apply your if-esle condition. Now instead of 4 seconds(cypress default timeout), the should command will re-try for 7 seconds to check that the element has the inner text value of 2.

cy.get(".badge.ml-1.badge-primary", { timeout: 7000 }).should("have.text", "2")

cy.get(".badge.ml-1.badge-primary")
  .invoke(text)
  .then((num) => {
    if ( num > 0) {
      doFunction1()
    } else {
      cy.get(xxxxx)
    }
  })