reactjs - TypeError: 'undefined' is not an object (evaluating 'this.props.people.map') -

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  1. i getting 'undefined' not object error when running test cases. here actual code. 

    class people extends react.component{     displayalert (email){        alert(email);  }  render (){  return (     <div>{         <ul key = {this.props.id}>             <li>                 <button onclick= {this.displayalert.bind(this, this.props.email)}>{this.props.lastname + ', ' + this.props.firstname}</button>             </li>         </ul>}     </div>   );  } }  class personlist extends react.component{ render () {  /* people array of people*/   var items = this.props.people.map( function ( item ){     return <people id = {item.id} email = {item.email} firstname = {item.firstname} lastname = {item.lastname}> </people> });  return (     <div> {items} </div>   )  } } react.render( <personlist people={ people } />, el );

  2. also, have test case check "person-list has instance every person". fails too. here test case , error message 

    it( `has instance every person`, () => {    let persons = scryrenderedcomponentswithtype( list, personitem );    expect( persons.length ).to.equal( people.length ); } );

phantomjs 1.9.8 (windows 7 0.0.0) person-list has instance every person failed assertionerror: expected 1 equal 2

  1. i have test case make sure there no elements. fails too. here test case , error 

    it( `doesn't have elements`, () => {     expect( domnode.queryselectorall( '> :not( ul )' ).length ).to.equal( 0 );    expect( domnode.queryselectorall( '> ul > :not( li )' ).length ).to.equal( 0 );  } );

phantomjs 1.9.8 (windows 7 0.0.0) person-list doesn't have elements failed domexception "error: syntax_err: dom exception 12" thrown, throw error :)


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