swiftunit-testingswift2xctestnscoding

Swift 2.0 Unit Testing for NSCoding

I am going to try and use the new testing features in Xcode 7 (code coverage) and Swift 2.0.

Using code coverage, I see that I am not testing my NSCoding methods.

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For a trivial example of saving a few details, such as:

required init(coder aDecoder: NSCoder) {
    name = aDecoder.decodeObjectForKey("name") as! String
    time = aDecoder.decodeIntegerForKey("time")
}

func encodeWithCoder(aCoder: NSCoder) {
    aCoder.encodeInteger(time, forKey: "time")
    aCoder.encodeObject(name, forKey: "name")
}

How do I go about testing these methods in an XCTest class.

Solution

  • Walking away from a problem always helps.

    func testDecoder() {

    let path = NSTemporaryDirectory() as NSString
    let locToSave = path.stringByAppendingPathComponent("teststasks")

    let newTask = Task(name: "savename", time: "10")

    // save tasks
    NSKeyedArchiver.archiveRootObject([newTask], toFile: locToSave)

    // load tasks
    let data = NSKeyedUnarchiver.unarchiveObjectWithFile(locToSave) as? [Task]

    XCTAssertNotNil(data)
    XCTAssertEqual(data!.count, 1)
    XCTAssertEqual(data!.first?.name, "savename")
    XCTAssertEqual(data!.first?.time, 10)
}