Question

在此操作中，我们初始化new Student()但仅在传入stuff的情况下。在测试中，不应传递stuff，因为该方法仅使用reducer初始化

在测试中，由于new Student()初始化TypeError: undefined is not an object (evaluating 'class_1.ClassActions.CLASS_INIT')，它失败了。如果删除了new Student()部分，则测试通过时没有任何问题。

当记录stuff时，它显示为null并且条件块中的任何日志都没有实际注销（因为它没有正式到达该块）。

为什么这个测试会影响代码的这一部分？是否有一种我缺少的解决方法？

动作：

import { Injectable } from '@angular/core';
import { NgRedux } from 'ng2-redux';
import { IAppState } from '../../store';

import { Student } from './../../store/class';

@Injectable()
export class ClassActions {
    public static CLASS_INIT = 'CLASS_INIT';

    constructor(
        private ngRedux: NgRedux<IAppState>
    ) { }

public classInit(stuff) {
        this.ngRedux.dispatch({
            type: ClassActions.CLASS_INIT
        });


        if (stuff) {
             let student: Student = new Student();

             // other logic
        };
    }
}

减速

import { ClassActions } from '../../actions/class';

export class Student {
    public data: any = {};
    public apps: any = [];
}


export interface IClassState {
    students: { [key: string]: Student };
}

export const INITIAL_STATE: IClassState = {
    students: {}
};

export function classStateReducer(state: IClassState = INITIAL_STATE, action: any) {

    switch (action.type) {
        case ClassActions.CLASS_INIT:
            return Object.assign({}, state, {});
     default:
            return state;
    }
};

Reducer.spec：

import { classStateReducer, INITIAL_STATE } from './class.reducer';
import { ClassActions } from './../../actions/class';

describe('Class Reducer', () => {
   it('should handle ClassActions.CLASS_INIT', () => {
        expect(
            classStateReducer(INITIAL_STATE, {
                type: ClassActions.CLASS_INIT
            })
        ).toEqual(INITIAL_STATE);
    });
});

减速器测试触发代码不应该

0 个答案: