Test concatenation

ConcatenationTest.swift

//  Created by Oleg H. on 5/17/18.
//  Copyright © 2018 Oleg H. All rights reserved.
//

import XCTest

let count = 150000

/* 
    Plust operator is faster.
*/

class StringsTestTests: XCTestCase {
    func testInterpolation() {
        var result = ""
        measure {
            let foo = "foo"
            let bar = "bar"
            for _ in 0 ..< count {
                result = "\(foo)\(bar)"
            }
        }
        print(result)
    }
    
    func testPlusOperator() {
        var result = ""
        measure {
            let foo = "foo"
            let bar = "bar"
            for _ in 0 ..< count {
                result = foo + bar
            }
        }
        print(result)
    }
}