EngineViewCacheTest.kt

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/* 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 org.mozilla.tv.firefox.webrender

import android.widget.FrameLayout

import androidx.test.core.app.ApplicationProvider

import mozilla.components.browser.engine.system.SystemEngine

import mozilla.components.browser.engine.system.SystemEngineView

import org.junit.Assert.assertEquals

import org.junit.Assert.assertTrue

import org.junit.Before

import org.junit.Test

import org.junit.runner.RunWith

import org.mockito.Mockito.mock

import org.mozilla.tv.firefox.session.SessionRepo

import org.robolectric.Robolectric

import org.mozilla.tv.firefox.helpers.FirefoxRobolectricTestRunner

@RunWith(FirefoxRobolectricTestRunner::class)

class EngineViewCacheTest {

    private lateinit var engineViewCache: EngineViewCache

    @Before

    fun setup() {

        // A fake user agent is required in order to instantiate WebRenderComponents.engine in a test

        SystemEngine.defaultUserAgent = "test-ua-string"

        engineViewCache = EngineViewCache(mock(SessionRepo::class.java))

    @Test

    fun `WHEN getEngineView is called multiple times THEN the same EngineView is returned`() {

        val engineView = getEngineView()

        val message = "Expected saved engineView to equal retrieved EngineView"

        assertTrue(message, engineView === getEngineView())

        assertTrue(message, engineView === getEngineView())

        assertTrue(message, engineView === getEngineView())

    @Test

    fun `GIVEN cached EngineView has a parent WHEN EngineView is returned THEN EngineView should be removed from parent`() {

        // Setup

        val engineView = getEngineView()

        assertEquals(null, engineView.parent)

        val parent = FrameLayout(ApplicationProvider.getApplicationContext())

        parent.addView(engineView)

        assertEquals(parent, engineView.parent)

        // Test

        assertEquals(null, getEngineView().parent)

    private fun getEngineView(): SystemEngineView {

        return engineViewCache.getEngineView(ApplicationProvider.getApplicationContext(),

                Robolectric.buildAttributeSet().build()) {}