Jasmine toEqual复杂对象（与函数混合） [英] Jasmine toEqual for complex objects (mixed with functions)

问题描述

目前，我有一个函数，有时会返回一个内部有一些函数的对象。当使用 expect（...）。toEqual（{...}）时，它似乎与这些复杂对象不匹配。具有函数的对象或文件类（来自输入类型文件），它不能。如何解决这个问题？

Currently, I have a function that sometimes return an object with some functions inside. When using expect(...).toEqual({...}) it doesn't seem to match those complex objects. Objects having functions or the File class (from input type file), it just can't. How to overcome this?

推荐答案

正如Vlad Magdalin在评论中指出的那样，将对象变为JSON字符串，它可以是尽可能深，以及函数和File / FileList类。当然，代替函数上的 toString（），它可以被称为'函数'

As Vlad Magdalin pointed out in the comments, making the object to a JSON string, it can be as deep as it is, and functions and File/FileList class. Of course, instead of toString() on the function, it could just be called 'Function'

function replacer(k, v) {
    if (typeof v === 'function') {
        v = v.toString();
    } else if (window['File'] && v instanceof File) {
        v = '[File]';
    } else if (window['FileList'] && v instanceof FileList) {
        v = '[FileList]';
    }
    return v;
}

beforeEach(function(){
    this.addMatchers({
        toBeJsonEqual: function(expected){
            var one = JSON.stringify(this.actual, replacer).replace(/(\\t|\\n)/g,''),
                two = JSON.stringify(expected, replacer).replace(/(\\t|\\n)/g,'');

                return one === two;
            }
    });
});

expect(obj).toBeJsonEqual(obj2);

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