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"No such module" when using @testable in Xcode Unit tests

I recently updated to Xcode 7 beta 5. I tried adding a unit test to an earlier project, but I am getting the error message "No such module [myModuleName]" on the @testable import myModuleName line.

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I tried

  • cleaning the project with Option Clean Build Folder
  • checking that "Enable Testability" (debug) was set to Yes in the Build Options
  • deleting the tests target and then re-adding the iOS Unit testing bundle

None of this worked for this project (but I have gotten testing to work in another project). Has anyone else had this problem and solved it?

Solution

  • The answer that worked for me

    The answer was that I had some errors in my project that was making the build fail. (It was just your standard every day bug in the code.) After I fixed the errors and did another clean and build, it worked.

    Note that these errors didn't show up at first. To get them to show up:

    • Comment out your entire Test file that is giving you the "No such module" error.
    • Try to run your project again.

    If there are other errors, they should show up now. Fix them and then uncomment your Test file code. The "No such module" error was gone for me.

    In case this doesn't solve the problem for other people, you can also try the following:

    Clean the build folder

    Open the Product menu, hold down Option, and click "Clean Build Folder..."

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    Make sure that Enable Testability is set to Yes

    In the Project Navigator click your project name. Select Build Settings and scroll down to Build Options. Make sure that Enable Testability is Yes (for debug).

    enter image description here

    Delete and re-add your Tests target

    If you have done the other things my guess is that you probably don't need to do this. But if you do, remember to save any Unit Tests that you have already written.

    Click your project name in the Project Navigator. Then select your Tests target. Click the minus (-) button at the bottom to delete it.

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    Then click the plus (+) button and choose iOS Unit Testing Bundle to add it back again. As you can see, you can also add a UI Testing Bundle in the same way.

    A few other ideas

    • Make sure that all required classes are members of your test target.
    • Make sure that you have added all the required libraries.
    • Make sure that the module name is written correctly (see this answer).

    Or...

    Leave a comment or answer below if you found something else that worked.

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