Test helper for creating attached fragment

    implementation Dependencies.androidx_test_junit

    implementation Dependencies.testing_mockito

    implementation Dependencies.androidx_fragment

    implementation (Dependencies.testing_robolectric) {

        exclude group: 'org.apache.maven'

    }

/* This Source Code Form is subject to the terms of the Mozilla Public

 * License, v. 2.0. If a copy of the MPL was not distributed with this

 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

package mozilla.components.support.test.robolectric

import androidx.fragment.app.Fragment

import androidx.fragment.app.FragmentActivity

import org.robolectric.Robolectric

/**

 * Set up an added [Fragment] to a [FragmentActivity] that has been initialized to a resumed state.

 *

 * @param fragmentTag the name that will be used to tag the fragment inside the [FragmentManager].

 * @param fragmentFactory a lambda function that returns a Fragment that will be added to the Activity.

 *

 * @return The same [Fragment] that was returned from [fragmentFactory] after it got added to the

 * Activity.

 */

inline fun <T : Fragment> createAddedTestFragment(fragmentTag: String = "test", fragmentFactory: () -> T): T {

    val activity = Robolectric.buildActivity(FragmentActivity::class.java)

            .create()

            .start()

            .resume()

            .get()

    return fragmentFactory().also {

        activity.supportFragmentManager.beginTransaction()

                .add(it, fragmentTag)

                .commitNow()

    }

}

/* This Source Code Form is subject to the terms of the Mozilla Public

 * License, v. 2.0. If a copy of the MPL was not distributed with this

 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

package mozilla.components.support.test.robolectric

import androidx.fragment.app.Fragment

import androidx.test.ext.junit.runners.AndroidJUnit4

import org.junit.Assert.assertNotNull

import org.junit.Assert.assertTrue

import org.junit.Test

import org.junit.runner.RunWith

@RunWith(AndroidJUnit4::class)

class FragmentsTest {

    @Test

    fun `setupFragment should add fragment correctly`() {

        val addedFragment = createAddedTestFragment { Fragment() }

        assertTrue(addedFragment.isAdded)

    }

    @Test

    fun `setupFragment should add fragment with correct tag`() {

        val fragment = createAddedTestFragment(fragmentTag = "aTag") { Fragment() }

        assertNotNull(fragment.fragmentManager?.findFragmentByTag("aTag"))

    }

}