Changing iOS app Display Name breaks @testable import

Question

When I update the display name in this field

all my tests fail as @testable import HomeApp needs to be updates to match.

I was always under the impression Display Name simply appeared under your app and a few other places, I cannot work out why this is being linked to the @testable import in my modules.

I also the following error:

Could not find test host for HomeTests: TEST_HOST evaluates to "/Users/dev/Library/Developer/Xcode/DerivedData/Home-hjxpvhyfkcwsqwfqzladedveshpm/Build/Products/Development-iphonesimulator/HomeApp.app/HomeApp"

Answer 1

When you update the display name field, you would also need to update Test Host field in Build Settings of your test target. The value of Test Host should be $(BUILT_PRODUCTS_DIR)/(name).app/name. Let's say if your app name is HomeAppUpdated it would be $(BUILT_PRODUCTS_DIR)/HomeAppUpdated.app/HomeAppUpdated. You can find Test Host field in build settings of your test target. Refer screenshot below. Hope it helps.