I am new to swift and xcode and I'm looking for instructions on how to unit test code on a command line application.
I've tried to build one myself but the compiler is giving me link errors that I can't debug. If there is some tutorial I couldn't find on google please point me to it - but most of the documentation out there is for learning swift via playgrounds - but I'd like to learn using unittesting and code katas.
Whenever I build I always get linker errors. Also no sort of code detection works like autocomplete for the classes I write.
Undefined symbols for architecture x86_64:
"Doubler.Doubler.__allocating_init () -> Doubler.Doubler", referenced from:
DoublerTests.DoublerTests.testExample () -> () in DoublerTests.o
"type metadata accessor for Doubler.Doubler", referenced from:
DoublerTests.DoublerTests.testExample () -> () in DoublerTests.o
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
import XCTest
@testable import Doubler
class DoublerTests: XCTestCase {
override func setUp() {
super.setUp()
}
override func tearDown() {
super.tearDown()
}
func testDoubler() {
let x = Doubler()
XCTAssertEqual(10, x.double(3)) // this should compile but fail the test
}
}Doubler:
import Foundation
class Doubler {
init (){
}
func double(n: Int) -> Int {
return n * 2
}
}