Enzyme - How to access and set input value

Question

I m confused about how to access  lt input gt  value when using mount  Here s what I ve got as my test     it  cancels changes when user presses esc   done   gt        const wrapper   mount  lt EditableText defaultValue  Hello    gt        const input   wrapper find  input         console log input render   attr  value         input simulate  focus        done            The console prints out undefined  But if I slightly modify the code  it works     it  cancels changes when user presses esc   done   gt        const wrapper   render  lt EditableText defaultValue  Hello    gt        const input   wrapper find  input         console log input val         input simulate  focus        done            Except  of course  the input simulate line fails since I m using render now  I need both to work properly  How do I fix this   EDIT   I should mention   lt EditableText   gt  is not a controlled component  But when I pass defaultValue into  lt input   gt   it seems to set the value  The second code block above does print out the value  and likewise if I inspect the input element in Chrome and type  0 value in the console  it shows the expected value

User · Answer

This works for me using enzyme 2 4 1   const wrapper   mount  lt EditableText defaultValue  Hello    gt    const input   wrapper find  input     console log input node value

User · Answer

Got it   updated improved version     it  cancels changes when user presses esc   done   gt        const wrapper   mount  lt EditableText defaultValue  Hello    gt        const input   wrapper find  input         input simulate  focus        input simulate  change     target    value   Changed            input simulate  keyDown           which  27        target            blur                  Needed since  lt EditableText   gt  calls target blur             input simulate  blur                                    expect input get 0  value  to equal  Hello         done

User · Answer

here is my code    const input   MobileNumberComponent find  input      when input props   onChange  target       id   mobile-no      value   1234567900       MobileNumberComponent update   const Footer    loginComponent find  Footer    expect Footer find  Buttons   props   disabled  equals false    I have update my DOM with componentname update   And then checking submit button validation disable enable  with length 10 digit

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I m using react with TypeScript and the following worked for me  wrapper find  input   getDOMNode lt HTMLInputElement gt    value    Hello   wrapper find  input   simulate  change      Setting the value directly  wrapper find  input   instance   value    Hello      was causing me a compile warning

User · Answer

I think what you want is   input simulate  change     target    value   Hello         Here s my source   You shouldn t need to use render   anywhere to set the value  And just FYI  you are using two different render   s  The one in your first code block is from Enzyme  and is a method on the wraper object mount and find give you  The second one  though it s not 100  clear  is probably the one from react-dom  If you re using Enzyme  just use shallow or mount as appropriate and there s no need for render from react-dom

User · Answer

In case anyone is struggling  I found the following working for me  const wrapper   mount  lt NewTask     props    gt       component under test const textField   wrapper find TextField    textField props   onChange   target    value   New Task 2       textField simulate  change       wrapper update   didn t work for me  need to find element again  console log wrapper find TextField  props        New Task 2   It seems that you need to define what happens in the change event first and then simulate it  instead of simulating the change event with data

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In my case i was using ref callbacks       lt input id  usuario  className  form-control  placeholder  Usuario                                                         name  usuario  type  usuario                                                         onKeyUp  this  validateMail bind this                                                          onChange      gt  this  validateMail                                                           ref   val    gt   this  username   val                                                        gt    To obtain the value  So enzyme will not change the value of this  username   So i had to   login node  username value    mario com com       user simulate  change        expect login state  mailValid    toBe true     To be able to set the value then call change   And then assert

User · Answer

With Enzyme 3  if you need to change an input value but don t need to fire the onChange function you can just do this  node property has been removed    wrapper find  input   instance   value    foo     You can use wrapper find  input   simulate  change     target    value   foo      to invoke onChange if you have a prop for that  ie  for controlled components

User · Answer

This worked for me    let wrapped   mount  lt Component   gt    expect wrapped find  input   get 0  props value  toEqual  something

User · Answer

None of the solutions above worked for me because I was using Formik and I needed to mark the field  quot touched quot  along with changing the field value  Following code worked for me  const emailField   orderPageWrapper find  input name  quot email quot      emailField simulate  focus   emailField simulate  change     target    value   test example com   name   email       emailField simulate  blur

User · Answer

I use Wrapper s setValue https   vue-test-utils vuejs org api wrapper  setvalue-value  method to set  value   inputA   wrapper findAll  input   at 0  inputA setValue  123456

User · Answer

I am using create-react-app which comes with jest by default and enzyme 2 7 0   This worked for me   const wrapper   mount  lt EditableText defaultValue  Hello    gt    const input   wrapper find  input   index      where index is the position of the input field of interest input node value    Change   input simulate  change   input   done

User · Answer

simulate   doesn t work for me somehow  I got it working with just accessing the node value without needing to call  simulate    in your case   const wrapper   mount  lt EditableText defaultValue  Hello    gt    const input   wrapper find  input   at 0       Get the value console log input node value      Hello     Set the value input node value    new value       Get the value console log input node value      new value   Hope this helps for others

User · Answer

None of the above worked for me  This is what worked for me on Enzyme  3 1 1   input instance   props onChange    target    value   19 00           Here is the rest of the code for context   const fakeHandleChangeValues   jest fn      const fakeErrors         errors           timePeriod  opHoursData 0  timePeriod        values             errorIndex  2          errorTime   19 00                         state  true       const wrapper   mount  lt AccessibleUI     handleChangeValues  fakeHandleChangeValues      opHoursData  opHoursData      translations  translationsForRendering      gt    const input   wrapper find   input-2   at 0   input instance   props onChange    target    value   19 00         expect wrapper state   error  toEqual fakeErrors

User · Answer

So lots of different opinions here  The only thing that worked for me was none of the above  it was using input props   value  I hope that helps

User · Answer

I solved in a very simple way   Set the value from props     const wrapper  ShallowWrapper   shallow  lt ProfileViewClass name   Sample Name    gt      Html code      lt input type  text  defaultValue  props name  className  edituser-name    gt    Access the attribute from wrapper find element  props   attribute-name     it  should render user name        gt        expect wrapper find   edituser-name   props   defaultValue  toContain props name          Cheers

[unit-testing] Enzyme - How to access and set <input> value?

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