42 lines
1.2 KiB
Kotlin
42 lines
1.2 KiB
Kotlin
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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package org.mozilla.fenix.home
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import android.view.ViewTreeObserver
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import androidx.fragment.app.Fragment
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import io.mockk.mockk
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import io.mockk.verify
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import org.junit.Before
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import org.junit.Test
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class TransitionPreDrawListenerTest {
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private lateinit var fragment: Fragment
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private lateinit var viewTreeObserver: ViewTreeObserver
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@Before
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fun setup() {
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fragment = mockk(relaxed = true)
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viewTreeObserver = mockk(relaxed = true)
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}
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@Test
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fun `adds observer when constructed`() {
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val listener = TransitionPreDrawListener(fragment, viewTreeObserver) {}
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verify { fragment.viewLifecycleOwner.lifecycle.addObserver(listener) }
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}
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@Test
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fun `adds listener on create and removes on destroy`() {
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val listener = TransitionPreDrawListener(fragment, viewTreeObserver) {}
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listener.onCreateView()
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verify { viewTreeObserver.addOnPreDrawListener(listener) }
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listener.onDestroyView()
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verify { viewTreeObserver.removeOnPreDrawListener(listener) }
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}
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}
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