reactjs - Testing React with mocha with --watch option, shows warnings only the first time -


i'm testing react component mocha. i'm trying catch warnings (through console), related "failed proptype" , other warnings react can give. i've had recur other methods of testing since test show warnings first time.

here's test code:

var jsdom = require('mocha-jsdom'); var { expect, assert } = require('chai'); var sinon  = require('sinon');   describe('deck', function() {     jsdom();      var react = require('react/addons');     var testutils = react.addons.testutils;     var deck, card, othermock;      var renderer, result;      beforeeach(function() {         deck = require('../app/components/deck.js');         card = require('../app/components/card.js')         othermock = react.createclass({ render: function() { return null } });          renderer = react.addons.testutils.createrenderer();          renderer.render(             <deck>                 <othermock />                 <othermock />                 <othermock />                 <card />                 <card />                 <card />             </deck>         );          result = renderer.getrenderoutput();      });      aftereach(function() {     });      it('should create new instance of deck', function () {         expect(result).to.exist;     });      it('should have default style', function () {         expect(result.props.style).to.exist;     });      it('should allow children of type card', function () {         expect(result.props.children.length).to.exist;         expect(result.props.children.length).to.equal(3);     });       it('should allow 1 card', function() {         var renderer = react.addons.testutils.createrenderer();          renderer.render(             <deck>                 <card />             </deck>         );          var result = renderer.getrenderoutput()         expect(result).to.exist;         expect(react.children.count(result.props.children)).to.equal(1);      });      it('should render empty when passed incorrect children', function() {         var renderer = react.addons.testutils.createrenderer();          renderer.render(             <deck>                 <othermock />             </deck>         );          var result = renderer.getrenderoutput()         expect(result).to.exist;         expect(react.children.count(result.props.children)).to.equal(0);      });      it('should render when empty', function() {         var renderer = react.addons.testutils.createrenderer();          renderer.render(             <deck />         );          var result = renderer.getrenderoutput()         expect(result).to.exist;     });      it('should add keys children', function() {         var index = react.children.count(result.props.children);         react.children.foreach(result.props.children, function(child) {             expect(child.props.cardindex).to.exist;             expect(child.props.cardindex).to.equal(--index);         })     });      it('should have first child handlers');      it('should have first , second child images');      it('should preload determined number of images');  })

what see first time run (typing npm run test calls mocha --watch --compilers js:babel/register --recursive) shows warnings , i'm able mock console.warn sinon , everything:

first time

however second time, don't warnings , tests console.warn spy fail.

second time

any idea going on here? i've tried reaching out in mocha's gitter, in irc's react channel, going through docs , through mocha --help, no avail.


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