How do I import a Swift file from another Swift file

Question

I simply want to include my Swift class from another file  like its test  PrimeNumberModel swift  import Foundation  class PrimeNumberModel       PrimeNumberModelTests swift  import XCTest import PrimeNumberModel     gives me  No such module  PrimeNumberModel    class PrimeNumberModelTests  XCTestCase       let testObject   PrimeNumberModel        Use of unresolved identifier  PrimeNumberModel           Both swift files are in the same directory

User · Answer

In Objective-C  if you wanted to use a class in another file you had to import it   import  quot SomeClass h quot   However  in Swift  you don t have to import at all  Simply use it as if it was already imported  Example    This is a file named SomeClass swift  class SomeClass   NSObject          This is a different file  named OtherClass swift  class OtherClass   NSObject       let object   SomeClass      As you can see  no import was needed  Hope this helps

User · Answer

As  high6 and  erik-p-hansen pointed out in the answer given by  high6  this can be overcome by importing the target for the module where the PrimeNumberModel class is  which is probably the same name as your project in a simple project   While looking at this  I came across the article Write your first Unit Test in Swift on swiftcast tv by Clayton McIlrath   It discusses access modifiers  shows an example of the same problem you are having  but for a ViewController rather than a model file  and shows how to both import the target and solve the access modifier problem by including the destination file in the target  meaning you don t have to make the class you are trying to test public unless you actually want to do so

User · Answer

According To Apple you don t need an import for swift files in the Same Target  I finally got it working by adding my swift file to both my regular target and test target  Then I used the bridging header for test to make sure my ObjC files that I referenced in my regular bridging header were available  Ran like a charm now   import XCTest   Optionally you can import the whole Objc Module by doing  import ModuleName  class HHASettings Tests  XCTestCase    override func setUp         let x   SettingsTableViewController   SettingsTableViewController        super setUp          Put setup code here  This method is called before the invocation of each test method in the class     override func tearDown            Put teardown code here  This method is called after the invocation of each test method in the class      super tearDown      func testExample            This is an example of a functional test case      XCTAssert true   Pass      func testPerformanceExample            This is an example of a performance test case      self measureBlock                Put the code you want to measure the time of here               SO make sure PrimeNumberModel has a target of your test Target  Or High6 solution of importing your whole module will work

User · Answer

Check target-membership of PrimeNumberModel swift in your testing target

User · Answer

UPDATE Swift 2 x  3 x  4 x and 5 x  Now you don t need to add the public to the methods to test then  On newer versions of Swift it s only necessary to add the  testable keyword   PrimeNumberModelTests swift  import XCTest  testable import MyProject  class PrimeNumberModelTests  XCTestCase       let testObject   PrimeNumberModel       And your internal methods can keep Internal  PrimeNumberModel swift  import Foundation  class PrimeNumberModel      init              Note that private  and fileprivate  symbols are not available even with using  testable     Swift 1 x  There are two relevant concepts from Swift here  As Xcode 6 beta 6     You don t need to import Swift classes  but you need to import external modules  targets  The Default Access Control level in Swift is Internal access   Considering that tests are on another target on PrimeNumberModelTests swift you need to import the target that contains the class that you want to test  if your target is called MyProject will need to add import MyProject to the PrimeNumberModelTests   PrimeNumberModelTests swift  import XCTest import MyProject  class PrimeNumberModelTests  XCTestCase       let testObject   PrimeNumberModel       But this is not enough to test your class PrimeNumberModel  since the default Access Control level is Internal Access  your class won t be visible to the test bundle  so you need to make it Public Access and all the methods that you want to test   PrimeNumberModel swift  import Foundation  public class PrimeNumberModel      public init

User · Answer

Instead of requiring explicit imports  the Swift compiler implicitly searches for  swiftmodule files of dependency Swift libraries   Xcode can build swift modules for you  or refer to the railsware blog for command line instructions for swiftc

User · Answer

In the Documentation it says there are no import statements in Swift     Simply use   let primNumber   PrimeNumberModel

User · Answer

I had the same problem  also in my XCTestCase files  but not in the regular project files    To get rid of the       Use of unresolved identifier  PrimeNumberModel    I needed to import the base module in the test file  In my case  my target is called  myproject  and I added import myproject and the class was recognised

User · Answer

You need to add a routine for the compiler to reference as an entry point  so add a main swift file  which in this case simply creates an instance of your test file   main swift  PrimeNumberModelTests     Then compile on the command line  I am using El Capitan and Swift 2 2    xcrun -sdk macosx swiftc -emit-executable -o PrimeNumberMain PrimeNumberModel swift PrimeNumberModelTests swift main swift   In this case  you will get a warning  result of initializer is unused  but the program compiles and is executable     PrimeNumberMain   CAVEAT  I removed the import XCTest and XCTestCase type for simplicity

User · Answer

So  you need to    Import external modules you want to use And make sure you have the right access modifiers on the class and methods you want to use    In my case I had a swift file I wanted to unit test  and the unit test file was also a swift class  I made sure the access modifiers were correct  but the statement  import stMobile    let s say that stMobile is our target name   still did not work  I was still getting the  No such module  error   I checked my target  and its name was indeed stMobile  So  I went to Build Settings  under packaging  and found the Product Module Name  and for some reason this was called St Mobile  so I changed my import statement  import St Mobile    which is the Product Module Name   and everything worked   So  to sum up    Check your Product Module Name and use the import statement below in you unit test class  import myProductModuleName  Make sure your access modifiers are correct  class level and your methods

User · Answer

I was able to solve this problem by cleaning my build   Top menu -  Product -  Clean Or keyboard shortcut  Shift Cmd K

User · Answer

Check your PrimeNumberModelTests Target Settings   If you can t see PrimeNumberModel swift file in Build Phases Compile Sources  add it

User · Answer

As of Swift 2 0  best practice is   Add the line  testable import MyApp to the top of your tests file  where  MyApp  is the Product Module Name of your app target  viewable in your app target s build settings   That s it    Note that the product module name will be the same as your app target s name unless your app target s name contains spaces  which will be replaced with underscores  For example  if my app target was called  Fun Game  I d write  testable import Fun Game at the top of my tests

[swift] How do I import a Swift file from another Swift file?

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