使用Jasmine的toHaveBeenCalledWith方法的对象类型

Question

我刚刚开始使用Jasmine,请原谅新手问题但是在使用时是否可以测试对象类型toHaveBeenCalledWith？

expect(object.method).toHaveBeenCalledWith(instanceof String);

我知道我可以做到这一点,但它正在检查返回值而不是参数.

expect(k instanceof namespace.Klass).toBeTruthy();

Answer 1

我已经发现了一种更加冷却的机制,jasmine.any()因为我发现手动分开的参数对于易读性来说是次优的.

在CoffeeScript中:

obj = {}
obj.method = (arg1, arg2) ->

describe "callback", ->

   it "should be called with 'world' as second argument", ->
     spyOn(obj, 'method')
     obj.method('hello', 'world')
     expect(obj.method).toHaveBeenCalledWith(jasmine.any(String), 'world')

Answer 2

toHaveBeenCalledWith是一种间谍的方法.所以你只能在间谍上调用它们,如文档中所述:

// your class to test
var Klass = function () {
};

Klass.prototype.method = function (arg) {
  return arg;
};


//the test
describe("spy behavior", function() {

  it('should spy on an instance method of a Klass', function() {
    // create a new instance
    var obj = new Klass();
    //spy on the method
    spyOn(obj, 'method');
    //call the method with some arguments
    obj.method('foo argument');
    //test the method was called with the arguments
    expect(obj.method).toHaveBeenCalledWith('foo argument');   
    //test that the instance of the last called argument is string 
    expect(obj.method.calls.mostRecent().args[0] instanceof String).toBeTruthy();
  });

});