How do I unit test a private Cocoapods library? - swift

Question

I am trying to find out how to set up unit testing for my private cocoapod library.
Here is the expecting result:
I added a unit testing target 'MyPodTests' to the 'Pods' Project, then I changed target to my 'MyPodTests' scheme. Then I created test classes for my unit tests. I can now select my 'MyPodLib' scheme and press CMD+U and the testing target executes the tests. This is the behavior I am looking for.
This approach, however, has some drawbacks. If I do 'pod update' or 'pod install' on my example app, the test target is gone. if I call pod update on my Example application, the tests are gone too. I'm certain there is a correct way to do this. Also, I would like to prevent the test classes from being loaded into any consumers using the library, therefore I added an exclusion to my podspec:
s.exclude_files = 'Pod/Classes/**/Test/*'
When I select MyPodLib and press CMD+U nothing is happening, and if I select MyPodTests and press CMD+U it throws "No such module 'MyPodLib'" error.

Answer 1

You'll probably want to have the tests running independently of your example app. If that's the case add a test subspec in your pod spec and set its source files.
For example, say you have an Xcode project with a framework target MyFramework and a test target MyFrameworkTests. Your pod spec will look like this:
Pod::Spec.new do |s|
s.name = "MyFramework"
s.version = "1.0.0"
s.summary = "Summary of what MyFramework does"
s.homepage = "https://www.website.com"
s.license = { :type => "MIT", :file => "LICENCE.txt" }
s.author = "Ramesh Boosa"
s.platform = :ios, "11.0"
s.swift_versions = ["5.0", "5.1"]
s.source = { :git => "https://github.com/MyName/MyFramework.git", :tag => "v#{s.version}" }
s.source_files = "MyFramework/*.swift"
s.test_spec do|test|
test.source_files = "MyFrameworkTests/*.swift"
end
end
To lint your pod spec and to run your unit tests execute pod spec lint MyFramework.podspec.
If your example app is included with your pod you can add an app host to your podspec. The CocoaPods documentation has more details.