Javascript 用 Jasmine 模拟日期构造函数
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Mock date constructor with Jasmine
提问by Rimian
I'm testing a function that takes a date as an optional argument. I want to assert that a new Date object is created if the function is called without the argument.
我正在测试一个将日期作为可选参数的函数。如果在没有参数的情况下调用函数，我想断言会创建一个新的 Date 对象。
var foo = function (date) {
var d = date || new Date();
return d.toISOString();
}
How do I assert that new Dateis called?
我如何断言它new Date被称为？
So far, I've got something like this:
到目前为止，我有这样的事情：
it('formats today like ISO-8601', function () {
spyOn(Date, 'prototype');
expect().toHaveBeenCalled();
});
采纳答案by Gordon Bockus
Credit to @HMR. Test I wrote to verify:
归功于@HMR。我写的测试来验证：
it('Should spy on Date', function() {
var oldDate = Date;
spyOn(window, 'Date').andCallFake(function() {
return new oldDate();
});
var d = new Date().toISOString;
expect(window.Date).toHaveBeenCalled();
});
回答by Anatoli Klamer
from jasmine example,
以茉莉花为例，
jasmine.clock().install();
var baseTime = new Date(2013, 9, 23);
jasmine.clock().mockDate(baseTime);
jasmine.clock().tick(50)
expect(new Date().getTime()).toEqual(baseTime.getTime() + 50);
afterEach(function () {
jasmine.clock().uninstall();
});
回答by cesarpachon
for me it worked with:
对我来说，它适用于：
spyOn(Date, 'now').and.callFake(function() {
return _currdate;
});
instead of .andCallFake(using "grunt-contrib-jasmine": "^0.6.5", that seems to include jasmine 2.0.0)
而不是.andCallFake（使用“grunt-contrib-jasmine”：“^0.6.5”，这似乎包括茉莉花2.0.0）
回答by scb
this worked for me
这对我有用
var baseTime = new Date().getTime();
spyOn(window, 'Date').and.callFake(function() {
return {getTime: function(){ return baseTime;}};
});
回答by Jeff Tian
For the users who are using Edge version of Jasmine:
对于使用 Edge 版本Jasmine 的用户：
it('Should spy on Date', function() {
var oldDate = Date;
// and.callFake
spyOn(window, 'Date').and.callFake(function() {
return new oldDate();
});
var d = new Date().toISOString;
expect(window.Date).toHaveBeenCalled();
});
