无法捕获protractor.promise.defer.reject

Question

我是量角器的新手。我想从protractor.promise.defer.reject

中捕获异常

var action = function(){
            var defer = protractor.promise.defer()
            ASYN_POST(function(result){
              if(result){
                defer.fulfill();
              }else{
                defer.reject(new Error('post failure'));
              }; 
            });
            return defer.promise;
          };
it('example', function(done){
   action().then(console.log).catch(function(){
        console.log('catch you');
   });
});

执行else分支时，不会调用catch函数。我该如何修复我的代码。感谢

输出：

 defer.reject(new Error('catch you'));
                         ^
Error: downgrading failure
    at Request._callback (/vagrant/vosaas438/spec/versions-api.spec.js:93:26)
    at Request.self.callback (/usr/local/lib/node_modules/request/request.js:199:22)
    at emitTwo (events.js:87:13)
    at Request.emit (events.js:172:7)

Answer 1

我也遇到过.catch（）问题。尝试为.then（callbackForSuccess，callbackForReject）提供第二个函数;它也将被用作拒绝的回调。

it('example', function(done){
   action().then(console.log, function(){
        console.log('catch you');
   });
});