Popularity

0.5

Stable

Activity

0.0

Stable

Stars 8

Watchers 2

Forks 5

Last Commit about 7 years ago

Description

Freezer is a library that allows your Swift tests to travel through time by mocking NSDate class.

Code Quality Rank: L5

Programming language: Swift

License: MIT License

Tags: Date Testing Mock

Latest version: v1.0.0

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* Code Quality Rankings and insights are calculated and provided by Lumnify.
They vary from L1 to L5 with "L5" being the highest.

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README

Freezer

Freezer is a library that allows your Swift tests to travel through time by mocking NSDate class.

Usage

Once Freezer.start() has been invoked, all calls to NSDate() or NSDate(timeIntervalSinceNow: secs) will return the time that has been frozen.

Helper function

freeze(NSDate(timeIntervalSince1970: 946684800)) {
    print(NSDate()) // 2000-01-01 00:00:00 +0000
}

Raw usage

let freezer = Freezer(to: NSDate(timeIntervalSince1970: 946684800))
freezer.start()
print(NSDate()) // 2000-01-01 00:00:00 +0000
freezer.stop()

Time shifting

Freezer will move you to a specified point in time, but then the time will keep ticking.

timeshift(NSDate(timeIntervalSince1970: 946684800)) {
    print(NSDate()) // 2000-01-01 00:00:00 +0000
    sleep(2)
    print(NSDate()) // 2000-01-01 00:00:02 +0000
}

Nested calls

Freezer allows performing nested freezing/shifts

freeze(NSDate(timeIntervalSince1970: 946684800)) {
    freeze(NSDate(timeIntervalSince1970: 946684000)) {
        freeze(NSDate(timeIntervalSince1970: 946684800)) {
            print(NSDate()) // 2000-01-01 00:00:00 +0000
        }
        print(NSDate()) // 1999-12-31 23:46:40 +0000
    }
    print(NSDate()) // 2000-01-01 00:00:00 +0000
}

Installation

CocoaPods

Just add pod 'Freezer', '~> 1.0' to your test target in Podfile.

Carthage

There is no Xcode project, so Carthage will not build a framework for this library. You can still use it, just add github "Pr0Ger/Freezer" ~> 1.0 to your Cartfile and then add Carthage/Checkout/Freezer/freezer.swift to your test target.

Manual

Just copy freezer.swift to your Xcode project and add it to your tests target. Most likely this library will not be updated, unless Apple breaks something by changing an internal implementation of NSDate, so this way is good too.