How do I access my app code from my tests in a Swift project? - xcode

Question

I have an Swift Xcode project with code such as:
class Utils: NSObject {
class func cleanString (input: String, trim: Bool) -> String {
// ...
}
}
and then I try to test it:
import XCTest
class AppTests: XCTestCase {
func testConfiguratio() {
Utils.cleanString("foo", trim: true)
}
}
but I get this error:
/Users/pupeno/Projects/macninja/AppTests/AppTests.swift:35:9: Use of unresolved identifier 'Utils'
I have Host Application APIs enabled:
What am I missing?

Answer 1

As it has been said already, the library code and the test code are 2 different modules. So you have to import the library into the test code and also make the functions that you want to test public, e.g:
public class Utils: NSObject {
public class func cleanString (input: String, trim: Bool) -> String {
// ...
}
}
and
import XCTest
import Utils
class AppTests: XCTestCase {
func testConfiguratio() {
Utils.cleanString("foo", trim: true)
}
}
If you want to see working code look at my IBANtools library project which implements exactly this scenario (class functions, swift framework, lots of testing).

Answer 2

If this is an OSX project - make sure you included
#Testable import YOURPROJECTNAME
Above the 'class AppTests: XCTestCase'
and clean your project files.
My Previous question where I had a similar issue is here
Hope this helps ( even a year later...)

Answer 3

The module that contains your tests is distinct from the module that contains your app code. When you want to access classes that are contained within a separate module you need to ensure that the to-be-imported classes are marked as public:
public class Utils: NSObject {
class func cleanString (input: String, trim: Bool) -> String {
// ...
}
}