Mock date constructor with Jasmine
Solution 1
Credit to @HMR. Test I wrote to verify:
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();
});
Solution 2
from jasmine example,
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();
});
Solution 3
for me it worked with:
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)
Solution 4
this worked for me
var baseTime = new Date().getTime();
spyOn(window, 'Date').and.callFake(function() {
return {getTime: function(){ return baseTime;}};
});
Solution 5
For me it worked by just using mockDate()
without anything else:
jasmine.clock().mockDate(new Date('2000-01-01T01:01:01'));
![Muhammad Hashir Anwaar](https://i.stack.imgur.com/9O9N7.png?s=256&g=1)
Muhammad Hashir Anwaar
I am a full stack Software Engineer on the web. Most of my work is remote and based in Australia. Over the course of my career, I have enjoyed working with talented engineering teams on a wide range of applications using different technologies. I have managed simple customer-facing applications and I have been fortunate to work with large teams on complex, high-budget, mission-critical code bases. I focus on delivering quality products that are functional, reliable, intuitive and that meet specifications. I am thorough, methodical in my work. I document, test and check what I do and I communicate effectively. I am creative, very strong in analytical problem-solving and I’m always evaluating my performance. I like mentoring and learning from other people. I believe I can cook a decent curry from scratch and I can bake bread without looking at the recipe.
Updated on August 17, 2021Comments
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Muhammad Hashir Anwaar almost 3 years
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.
var foo = function (date) { var d = date || new Date(); return d.toISOString(); }
How do I assert that
new Date
is called?So far, I've got something like this:
it('formats today like ISO-8601', function () { spyOn(Date, 'prototype'); expect().toHaveBeenCalled(); });