Resolving the “No Such Module” Error in Xcode Unit Tests

Resolving the "No Such Module" Error in Xcode Unit Tests

28 February 2025 Stephan Petzl Leave a comment Xcode

Encountering the “No Such Module” error while using @testable imports in Xcode can be a frustrating experience, especially if you’re new to unit testing in iOS development. This error typically arises when Xcode is unable to find the module you are trying to import for testing. This guide will walk you through several steps to identify and resolve this issue effectively.

Common Solutions

Here are several potential solutions to address the “No Such Module” error:

  • Verify Module Name: Ensure that the module name you are trying to import matches the Product Module Name in your target’s build settings. Navigate to Target -> Build Settings -> Product Module Name to confirm this.
  • Resolve Build Errors: Often, unseen errors in your code may prevent a successful build. Comment out the test file causing the error and re-run your project. Any underlying errors should become visible and can be addressed. Once fixed, uncomment your test file and try again.
  • Enable Testability: Check that Enable Testability is set to Yes under Build Settings -> Build Options. This setting allows your code to be accessible to the test target.
  • Check Deployment Targets: Ensure that the iOS Deployment Target for your test target matches that of your main application.
  • Correct Target Membership: Confirm that all necessary classes and libraries are included in the test target. This can be done by ensuring they are part of the Target Membership.

Advanced Troubleshooting

If the basic solutions do not resolve the issue, consider the following advanced troubleshooting steps:

  • Update Product Name: If you have recently changed your product name, ensure the @testable import statement reflects this new name.
  • Bridging Headers: If your project uses a bridging header, verify that the path is correctly set in the test target.
  • SwiftLint Configuration: If using SwiftLint, ensure that disabling rules with // swiftlint:disable all does not interfere with the test file’s detection.

Automating Testing with Repeato

While addressing test errors like “No Such Module” is essential, efficient test automation can further streamline your development process. Consider using Repeato, a no-code test automation tool for iOS, Android, and web apps. Repeato leverages computer vision and AI to simplify the creation, execution, and maintenance of automated tests.

With Repeato, you can quickly record tests using its intuitive test recorder, making test editing and execution remarkably fast. The tool also supports complex task automation with command line scripts or JavaScript code, making it a versatile solution for developers. Moreover, Repeato’s data-driven testing capabilities and support for keyword-driven testing enhance its utility in diverse testing scenarios.

For more information on how to integrate Repeato into your testing workflow, visit our documentation.

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