CODEWITHSUNDEEP
androidunit-testingtestingtdd
Hannes Hertach
Hannes Hertach

Reputation: 529

Android: Add separate resources for tests only

I am developing an android library.

The library takes in some parameters. For instance, it has a setStyle method which takes in a reference to a style resource:

fun setStyle(@StyleRes style: Int) ...

I want to test this method. To do this, I want to pass a resource TestStyle to the library in a unit test. Something like this:

myLibrary.setStyle(R.style.TestStyle)

However, I don't want to create the TestStyle resource in the main src/main/res/values/styles.xml because this would make the resource available to people using my library. I want it to only be available in tests.

Instead, I tried to place the TestStyle <item /> in a new test-only file at src/test/res/values/styles.xml. However, I can't figure out how to access this in the unit test, as it is not available through R.

How can I create resources that are only accessible in tests and not in other parts of the code?

Upvotes: 5

Views: 1895

Answers (1)

Petrakeas
Petrakeas

Reputation: 1690

Place your resources in some folder. For example "src/test/res". And use the following gradle configuration:

android {
...
  testOptions {
        unitTests.includeAndroidResources = true
    }
}

tasks.withType(Test) {
    android.sourceSets.main.res.srcDirs += 'src/test/res'
}

This way, the resources will be visible for debug and release test builds, but they will not be packaged to your library or app.

Upvotes: 7

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