CODEWITHSUNDEEP
androidandroid-fragmentskotlin
Hitit
Hitit

Reputation: 478

How to instantiate Fragment class?

I am trying to write a unit test for my Fragment class. Is it possible to instantiate "System Under Test" this way?

val sut = MyFragment()

I understand there are several methods for writing UI tests for testing fragments, but I want to instantiate my Fragment class where I can unit test methods within the fragment.

such as , 

@Test
fun testComponents() {
    val bundle = Bundle()
    val context = sut.requireContext()
    sut.checkPwdEditTextIsEmpty(text = "")
}

How can I do this in Kotlin??

Also, how can I write init() and tearDown() in Kotlin test?

Upvotes: 0

Views: 165

Answers (1)

ianhanniballake
ianhanniballake

Reputation: 199795

Methods like requireContext() and accessing the Views of a Fragment require the Fragment to be added to a FragmentManager. As per the Test your app's fragments documentation, you can use FragmentScenario to write exactly those types of tests:

@Test
fun testComponents() {
    val scenario = launchFragmentInContainer<MyFragment>()
    scenario.onFragment { sut ->
        val context = sut.requireContext()
        sut.checkPwdEditTextIsEmpty(text = "")
    }
}

Upvotes: 3

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