XCTAssertEqual: How to compare NSDates?

Question

NSDate *date = [NSDate date];
XCTAssertEqual([[store selectedDate] timeIntervalSinceReferenceDate], [date timeIntervalSinceReferenceDate]);

This gives me the error message:

(([[store selectedDate] timeIntervalSinceReferenceDate]) equal to ([date timeIntervalSinceReferenceDate])) failed: 
("405290648.294") is not equal to ("405290648.294")

I had previous a similar problem with Integers, which had to solved by casting it to NSUInteger as described here.

But I couldn't figure out how to solve this with NSDate objects / doubles (as in this case).

Answer 1

use XCTAssertEqualWithAccuracy to compare floating numbers

XCTAssertEqualWithAccuracy([[store selectedDate] timeIntervalSinceReferenceDate], [date timeIntervalSinceReferenceDate], 0.001);

Answer 2

In earlier Swift you needed to use this:

let receivedDateTimeInterval = receivedDate.timeIntervalSinceReferenceDate
let expectedDateTimeInterval = expectedDate.timeIntervalSinceReferenceDate
XCTAssertEqualWithAccuracy(receivedDateTimeInterval, expectedDateTimeInterval, accuracy: 0.001)

Now you can lose the "WithAccuracy" part:

XCTAssertEqual(receivedDateTimeInterval, expectedDateTimeInterval, accuracy: 0.001)

Answer 3

This should work, and should be sufficient for the test.

XCTAssertEqualWithAccuracy([refDate timeIntervalSinceReferenceDate], [date timeIntervalSinceReferenceDate],0.00001,@"");