/* 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.concept.engine

import android.graphics.Bitmap
import mozilla.components.concept.engine.EngineSession.LoadUrlFlags
import mozilla.components.concept.engine.EngineSession.TrackingProtectionPolicy
import mozilla.components.concept.engine.EngineSession.TrackingProtectionPolicy.CookiePolicy
import mozilla.components.concept.engine.EngineSession.TrackingProtectionPolicy.TrackingCategory
import mozilla.components.concept.engine.content.blocking.Tracker
import mozilla.components.concept.engine.history.HistoryItem
import mozilla.components.concept.engine.mediasession.MediaSession
import mozilla.components.concept.engine.permission.PermissionRequest
import mozilla.components.concept.engine.window.WindowRequest
import mozilla.components.support.test.mock
import org.junit.Assert.assertEquals
import org.junit.Assert.assertFalse
import org.junit.Assert.assertTrue
import org.junit.Test
import org.mockito.Mockito.mock
import org.mockito.Mockito.never
import org.mockito.Mockito.spy
import org.mockito.Mockito.times
import org.mockito.Mockito.verify
import org.mockito.Mockito.verifyNoInteractions
import org.mockito.Mockito.verifyNoMoreInteractions
import java.lang.reflect.Modifier

class EngineSessionTest {
    private val unknownHitResult = HitResult.UNKNOWN("file://foobar")

    @Test
    fun `registered observers will be notified`() {
        val session = spy(DummyEngineSession())

        val observer = mock(EngineSession.Observer::class.java)
        val emptyBitmap = spy(Bitmap::class.java)
        val permissionRequest = mock(PermissionRequest::class.java)
        val windowRequest = mock(WindowRequest::class.java)
        session.register(observer)

        val mediaSessionController: MediaSession.Controller = mock()
        val mediaSessionMetadata: MediaSession.Metadata = mock()
        val mediaSessionFeature: MediaSession.Feature = mock()
        val mediaSessionPositionState: MediaSession.PositionState = mock()
        val mediaSessionElementMetadata: MediaSession.ElementMetadata = mock()
        val tracker = Tracker("tracker")

        session.notifyInternalObservers { onLocationChange("https://www.mozilla.org") }
        session.notifyInternalObservers { onLocationChange("https://www.firefox.com") }
        session.notifyInternalObservers { onProgress(25) }
        session.notifyInternalObservers { onProgress(100) }
        session.notifyInternalObservers { onLoadingStateChange(true) }
        session.notifyInternalObservers { onSecurityChange(true, "mozilla.org", "issuer") }
        session.notifyInternalObservers { onTrackerBlockingEnabledChange(true) }
        session.notifyInternalObservers { onTrackerBlocked(tracker) }
        session.notifyInternalObservers { onExcludedOnTrackingProtectionChange(true) }
        session.notifyInternalObservers { onLongPress(unknownHitResult) }
        session.notifyInternalObservers { onDesktopModeChange(true) }
        session.notifyInternalObservers { onFind("search") }
        session.notifyInternalObservers { onFindResult(0, 1, true) }
        session.notifyInternalObservers { onFullScreenChange(true) }
        session.notifyInternalObservers { onMetaViewportFitChanged(1) }
        session.notifyInternalObservers { onThumbnailChange(emptyBitmap) }
        session.notifyInternalObservers { onContentPermissionRequest(permissionRequest) }
        session.notifyInternalObservers { onCancelContentPermissionRequest(permissionRequest) }
        session.notifyInternalObservers { onAppPermissionRequest(permissionRequest) }
        session.notifyInternalObservers { onWindowRequest(windowRequest) }
        session.notifyInternalObservers { onMediaActivated(mediaSessionController) }
        session.notifyInternalObservers { onMediaDeactivated() }
        session.notifyInternalObservers { onMediaMetadataChanged(mediaSessionMetadata) }
        session.notifyInternalObservers { onMediaFeatureChanged(mediaSessionFeature) }
        session.notifyInternalObservers { onMediaPlaybackStateChanged(MediaSession.PlaybackState.PLAYING) }
        session.notifyInternalObservers { onMediaPositionStateChanged(mediaSessionPositionState) }
        session.notifyInternalObservers { onMediaMuteChanged(true) }
        session.notifyInternalObservers { onMediaFullscreenChanged(true, mediaSessionElementMetadata) }
        session.notifyInternalObservers { onCrash() }
        session.notifyInternalObservers { onLoadRequest("https://www.mozilla.org", true, true) }
        session.notifyInternalObservers { onLaunchIntentRequest("https://www.mozilla.org", null) }
        session.notifyInternalObservers { onProcessKilled() }
        session.notifyInternalObservers { onShowDynamicToolbar() }

        verify(observer).onLocationChange("https://www.mozilla.org")
        verify(observer).onLocationChange("https://www.firefox.com")
        verify(observer).onProgress(25)
        verify(observer).onProgress(100)
        verify(observer).onLoadingStateChange(true)
        verify(observer).onSecurityChange(true, "mozilla.org", "issuer")
        verify(observer).onTrackerBlockingEnabledChange(true)
        verify(observer).onTrackerBlocked(tracker)
        verify(observer).onExcludedOnTrackingProtectionChange(true)
        verify(observer).onLongPress(unknownHitResult)
        verify(observer).onDesktopModeChange(true)
        verify(observer).onFind("search")
        verify(observer).onFindResult(0, 1, true)
        verify(observer).onFullScreenChange(true)
        verify(observer).onMetaViewportFitChanged(1)
        verify(observer).onThumbnailChange(emptyBitmap)
        verify(observer).onAppPermissionRequest(permissionRequest)
        verify(observer).onContentPermissionRequest(permissionRequest)
        verify(observer).onCancelContentPermissionRequest(permissionRequest)
        verify(observer).onWindowRequest(windowRequest)
        verify(observer).onMediaActivated(mediaSessionController)
        verify(observer).onMediaDeactivated()
        verify(observer).onMediaMetadataChanged(mediaSessionMetadata)
        verify(observer).onMediaFeatureChanged(mediaSessionFeature)
        verify(observer).onMediaPlaybackStateChanged(MediaSession.PlaybackState.PLAYING)
        verify(observer).onMediaPositionStateChanged(mediaSessionPositionState)
        verify(observer).onMediaMuteChanged(true)
        verify(observer).onMediaFullscreenChanged(true, mediaSessionElementMetadata)
        verify(observer).onCrash()
        verify(observer).onLoadRequest("https://www.mozilla.org", true, true)
        verify(observer).onLaunchIntentRequest("https://www.mozilla.org", null)
        verify(observer).onProcessKilled()
        verify(observer).onShowDynamicToolbar()
        verifyNoMoreInteractions(observer)
    }

    @Test
    fun `observer will not be notified after calling unregister`() {
        val session = spy(DummyEngineSession())
        val observer = mock(EngineSession.Observer::class.java)
        val otherHitResult = HitResult.UNKNOWN("file://foobaz")
        val permissionRequest = mock(PermissionRequest::class.java)
        val otherPermissionRequest = mock(PermissionRequest::class.java)
        val windowRequest = mock(WindowRequest::class.java)
        val otherWindowRequest = mock(WindowRequest::class.java)
        val emptyBitmap = spy(Bitmap::class.java)
        val tracker = Tracker("tracker")

        session.register(observer)

        session.notifyInternalObservers { onLocationChange("https://www.mozilla.org") }
        session.notifyInternalObservers { onProgress(25) }
        session.notifyInternalObservers { onLoadingStateChange(true) }
        session.notifyInternalObservers { onSecurityChange(true, "mozilla.org", "issuer") }
        session.notifyInternalObservers { onTrackerBlockingEnabledChange(true) }
        session.notifyInternalObservers { onTrackerBlocked(tracker) }
        session.notifyInternalObservers { onLongPress(unknownHitResult) }
        session.notifyInternalObservers { onDesktopModeChange(true) }
        session.notifyInternalObservers { onFind("search") }
        session.notifyInternalObservers { onFindResult(0, 1, true) }
        session.notifyInternalObservers { onFullScreenChange(true) }
        session.notifyInternalObservers { onMetaViewportFitChanged(1) }
        session.notifyInternalObservers { onThumbnailChange(emptyBitmap) }
        session.notifyInternalObservers { onContentPermissionRequest(permissionRequest) }
        session.notifyInternalObservers { onCancelContentPermissionRequest(permissionRequest) }
        session.notifyInternalObservers { onAppPermissionRequest(permissionRequest) }
        session.notifyInternalObservers { onWindowRequest(windowRequest) }
        session.notifyInternalObservers { onCrash() }
        session.notifyInternalObservers { onLoadRequest("https://www.mozilla.org", true, true) }
        session.notifyInternalObservers { onLaunchIntentRequest("https://www.mozilla.org", null) }
        session.notifyInternalObservers { onShowDynamicToolbar() }
        session.unregister(observer)

        val mediaSessionController: MediaSession.Controller = mock()
        val mediaSessionMetadata: MediaSession.Metadata = mock()
        val mediaSessionFeature: MediaSession.Feature = mock()
        val mediaSessionPositionState: MediaSession.PositionState = mock()
        val mediaSessionElementMetadata: MediaSession.ElementMetadata = mock()

        session.notifyInternalObservers { onLocationChange("https://www.firefox.com") }
        session.notifyInternalObservers { onProgress(100) }
        session.notifyInternalObservers { onLoadingStateChange(false) }
        session.notifyInternalObservers { onSecurityChange(false, "", "") }
        session.notifyInternalObservers { onTrackerBlocked(tracker) }
        session.notifyInternalObservers { onTrackerBlockingEnabledChange(false) }
        session.notifyInternalObservers { onLongPress(otherHitResult) }
        session.notifyInternalObservers { onDesktopModeChange(false) }
        session.notifyInternalObservers { onFind("search2") }
        session.notifyInternalObservers { onFindResult(0, 1, false) }
        session.notifyInternalObservers { onFullScreenChange(false) }
        session.notifyInternalObservers { onMetaViewportFitChanged(2) }
        session.notifyInternalObservers { onThumbnailChange(null) }
        session.notifyInternalObservers { onContentPermissionRequest(otherPermissionRequest) }
        session.notifyInternalObservers { onCancelContentPermissionRequest(otherPermissionRequest) }
        session.notifyInternalObservers { onAppPermissionRequest(otherPermissionRequest) }
        session.notifyInternalObservers { onWindowRequest(windowRequest) }
        session.notifyInternalObservers { onMediaActivated(mediaSessionController) }
        session.notifyInternalObservers { onMediaDeactivated() }
        session.notifyInternalObservers { onMediaMetadataChanged(mediaSessionMetadata) }
        session.notifyInternalObservers { onMediaFeatureChanged(mediaSessionFeature) }
        session.notifyInternalObservers { onMediaPlaybackStateChanged(MediaSession.PlaybackState.PLAYING) }
        session.notifyInternalObservers { onMediaPositionStateChanged(mediaSessionPositionState) }
        session.notifyInternalObservers { onMediaMuteChanged(true) }
        session.notifyInternalObservers { onMediaFullscreenChanged(true, mediaSessionElementMetadata) }
        session.notifyInternalObservers { onCrash() }
        session.notifyInternalObservers { onLoadRequest("https://www.mozilla.org", true, true) }
        session.notifyInternalObservers { onLaunchIntentRequest("https://www.firefox.com", null) }
        session.notifyInternalObservers { onShowDynamicToolbar() }

        verify(observer).onLocationChange("https://www.mozilla.org")
        verify(observer).onProgress(25)
        verify(observer).onLoadingStateChange(true)
        verify(observer).onSecurityChange(true, "mozilla.org", "issuer")
        verify(observer).onTrackerBlockingEnabledChange(true)
        verify(observer).onTrackerBlocked(tracker)
        verify(observer).onLongPress(unknownHitResult)
        verify(observer).onDesktopModeChange(true)
        verify(observer).onFind("search")
        verify(observer).onFindResult(0, 1, true)
        verify(observer).onFullScreenChange(true)
        verify(observer).onMetaViewportFitChanged(1)
        verify(observer).onThumbnailChange(emptyBitmap)
        verify(observer).onAppPermissionRequest(permissionRequest)
        verify(observer).onContentPermissionRequest(permissionRequest)
        verify(observer).onCancelContentPermissionRequest(permissionRequest)
        verify(observer).onWindowRequest(windowRequest)
        verify(observer).onCrash()
        verify(observer).onLoadRequest("https://www.mozilla.org", true, true)
        verify(observer).onLaunchIntentRequest("https://www.mozilla.org", null)
        verify(observer).onShowDynamicToolbar()
        verify(observer, never()).onLocationChange("https://www.firefox.com")
        verify(observer, never()).onProgress(100)
        verify(observer, never()).onLoadingStateChange(false)
        verify(observer, never()).onSecurityChange(false, "", "")
        verify(observer, never()).onTrackerBlockingEnabledChange(false)
        verify(observer, never()).onTrackerBlocked(Tracker("Tracker"))
        verify(observer, never()).onLongPress(otherHitResult)
        verify(observer, never()).onDesktopModeChange(false)
        verify(observer, never()).onFind("search2")
        verify(observer, never()).onFindResult(0, 1, false)
        verify(observer, never()).onFullScreenChange(false)
        verify(observer, never()).onMetaViewportFitChanged(2)
        verify(observer, never()).onThumbnailChange(null)
        verify(observer, never()).onAppPermissionRequest(otherPermissionRequest)
        verify(observer, never()).onContentPermissionRequest(otherPermissionRequest)
        verify(observer, never()).onCancelContentPermissionRequest(otherPermissionRequest)
        verify(observer, never()).onWindowRequest(otherWindowRequest)
        verify(observer, never()).onMediaActivated(mediaSessionController)
        verify(observer, never()).onMediaDeactivated()
        verify(observer, never()).onMediaMetadataChanged(mediaSessionMetadata)
        verify(observer, never()).onMediaFeatureChanged(mediaSessionFeature)
        verify(observer, never()).onMediaPlaybackStateChanged(MediaSession.PlaybackState.PLAYING)
        verify(observer, never()).onMediaPositionStateChanged(mediaSessionPositionState)
        verify(observer, never()).onMediaMuteChanged(true)
        verify(observer, never()).onMediaFullscreenChanged(true, mediaSessionElementMetadata)
        verify(observer, never()).onLoadRequest("https://www.mozilla.org", false, true)
        verify(observer, never()).onLaunchIntentRequest("https://www.firefox.com", null)
        verifyNoMoreInteractions(observer)
    }

    @Test
    fun `observers will not be notified after calling unregisterObservers`() {
        val session = spy(DummyEngineSession())
        val observer = mock(EngineSession.Observer::class.java)
        val otherObserver = mock(EngineSession.Observer::class.java)
        val permissionRequest = mock(PermissionRequest::class.java)
        val otherPermissionRequest = mock(PermissionRequest::class.java)
        val windowRequest = mock(WindowRequest::class.java)
        val otherWindowRequest = mock(WindowRequest::class.java)
        val otherHitResult = HitResult.UNKNOWN("file://foobaz")
        val emptyBitmap = spy(Bitmap::class.java)
        val tracker = Tracker("tracker")

        session.register(observer)
        session.register(otherObserver)

        session.notifyInternalObservers { onLocationChange("https://www.mozilla.org") }
        session.notifyInternalObservers { onProgress(25) }
        session.notifyInternalObservers { onLoadingStateChange(true) }
        session.notifyInternalObservers { onSecurityChange(true, "mozilla.org", "issuer") }
        session.notifyInternalObservers { onTrackerBlockingEnabledChange(true) }
        session.notifyInternalObservers { onTrackerBlocked(tracker) }
        session.notifyInternalObservers { onLongPress(unknownHitResult) }
        session.notifyInternalObservers { onDesktopModeChange(true) }
        session.notifyInternalObservers { onFind("search") }
        session.notifyInternalObservers { onFindResult(0, 1, true) }
        session.notifyInternalObservers { onFullScreenChange(true) }
        session.notifyInternalObservers { onMetaViewportFitChanged(1) }
        session.notifyInternalObservers { onThumbnailChange(emptyBitmap) }
        session.notifyInternalObservers { onContentPermissionRequest(permissionRequest) }
        session.notifyInternalObservers { onCancelContentPermissionRequest(permissionRequest) }
        session.notifyInternalObservers { onAppPermissionRequest(permissionRequest) }
        session.notifyInternalObservers { onWindowRequest(windowRequest) }
        session.notifyInternalObservers { onShowDynamicToolbar() }

        session.unregisterObservers()

        var mediaSessionController: MediaSession.Controller = mock()
        val mediaSessionMetadata: MediaSession.Metadata = mock()
        val mediaSessionFeature: MediaSession.Feature = mock()
        val mediaSessionPositionState: MediaSession.PositionState = mock()
        val mediaSessionElementMetadata: MediaSession.ElementMetadata = mock()

        session.notifyInternalObservers { onLocationChange("https://www.firefox.com") }
        session.notifyInternalObservers { onProgress(100) }
        session.notifyInternalObservers { onLoadingStateChange(false) }
        session.notifyInternalObservers { onSecurityChange(false, "", "") }
        session.notifyInternalObservers { onTrackerBlocked(tracker) }
        session.notifyInternalObservers { onTrackerBlockingEnabledChange(false) }
        session.notifyInternalObservers { onLongPress(otherHitResult) }
        session.notifyInternalObservers { onDesktopModeChange(false) }
        session.notifyInternalObservers { onFind("search2") }
        session.notifyInternalObservers { onFindResult(0, 1, false) }
        session.notifyInternalObservers { onFullScreenChange(false) }
        session.notifyInternalObservers { onMetaViewportFitChanged(2) }
        session.notifyInternalObservers { onThumbnailChange(null) }
        session.notifyInternalObservers { onContentPermissionRequest(otherPermissionRequest) }
        session.notifyInternalObservers { onCancelContentPermissionRequest(otherPermissionRequest) }
        session.notifyInternalObservers { onAppPermissionRequest(otherPermissionRequest) }
        session.notifyInternalObservers { onWindowRequest(windowRequest) }
        session.notifyInternalObservers { onMediaActivated(mediaSessionController) }
        session.notifyInternalObservers { onMediaDeactivated() }
        session.notifyInternalObservers { onMediaMetadataChanged(mediaSessionMetadata) }
        session.notifyInternalObservers { onMediaFeatureChanged(mediaSessionFeature) }
        session.notifyInternalObservers { onMediaPlaybackStateChanged(MediaSession.PlaybackState.PLAYING) }
        session.notifyInternalObservers { onMediaPositionStateChanged(mediaSessionPositionState) }
        session.notifyInternalObservers { onMediaMuteChanged(true) }
        session.notifyInternalObservers { onMediaFullscreenChanged(true, mediaSessionElementMetadata) }
        session.notifyInternalObservers { onShowDynamicToolbar() }

        verify(observer).onLocationChange("https://www.mozilla.org")
        verify(observer).onProgress(25)
        verify(observer).onLoadingStateChange(true)
        verify(observer).onSecurityChange(true, "mozilla.org", "issuer")
        verify(observer).onTrackerBlockingEnabledChange(true)
        verify(observer).onTrackerBlocked(tracker)
        verify(observer).onLongPress(unknownHitResult)
        verify(observer).onDesktopModeChange(true)
        verify(observer).onFind("search")
        verify(observer).onFindResult(0, 1, true)
        verify(observer).onFullScreenChange(true)
        verify(observer).onMetaViewportFitChanged(1)
        verify(observer).onThumbnailChange(emptyBitmap)
        verify(observer).onAppPermissionRequest(permissionRequest)
        verify(observer).onContentPermissionRequest(permissionRequest)
        verify(observer).onCancelContentPermissionRequest(permissionRequest)
        verify(observer).onWindowRequest(windowRequest)
        verify(observer).onShowDynamicToolbar()
        verify(observer, never()).onLocationChange("https://www.firefox.com")
        verify(observer, never()).onProgress(100)
        verify(observer, never()).onLoadingStateChange(false)
        verify(observer, never()).onSecurityChange(false, "", "")
        verify(observer, never()).onTrackerBlockingEnabledChange(false)
        verify(observer, never()).onTrackerBlocked(Tracker("Tracker"))
        verify(observer, never()).onLongPress(otherHitResult)
        verify(observer, never()).onDesktopModeChange(false)
        verify(observer, never()).onFind("search2")
        verify(observer, never()).onFindResult(0, 1, false)
        verify(observer, never()).onFullScreenChange(false)
        verify(observer, never()).onMetaViewportFitChanged(2)
        verify(observer, never()).onThumbnailChange(null)
        verify(observer, never()).onAppPermissionRequest(otherPermissionRequest)
        verify(observer, never()).onContentPermissionRequest(otherPermissionRequest)
        verify(observer, never()).onCancelContentPermissionRequest(otherPermissionRequest)
        verify(observer, never()).onWindowRequest(otherWindowRequest)
        verify(observer, never()).onMediaActivated(mediaSessionController)
        verify(observer, never()).onMediaDeactivated()
        verify(observer, never()).onMediaMetadataChanged(mediaSessionMetadata)
        verify(observer, never()).onMediaFeatureChanged(mediaSessionFeature)
        verify(observer, never()).onMediaPlaybackStateChanged(MediaSession.PlaybackState.PLAYING)
        verify(observer, never()).onMediaPositionStateChanged(mediaSessionPositionState)
        verify(observer, never()).onMediaMuteChanged(true)
        verify(observer, never()).onMediaFullscreenChanged(true, mediaSessionElementMetadata)
        verify(otherObserver, never()).onLocationChange("https://www.firefox.com")
        verify(otherObserver, never()).onProgress(100)
        verify(otherObserver, never()).onLoadingStateChange(false)
        verify(otherObserver, never()).onSecurityChange(false, "", "")
        verify(otherObserver, never()).onTrackerBlockingEnabledChange(false)
        verify(otherObserver, never()).onTrackerBlocked(Tracker("Tracker"))
        verify(otherObserver, never()).onLongPress(otherHitResult)
        verify(otherObserver, never()).onDesktopModeChange(false)
        verify(otherObserver, never()).onFind("search2")
        verify(otherObserver, never()).onFindResult(0, 1, false)
        verify(otherObserver, never()).onFullScreenChange(false)
        verify(otherObserver, never()).onMetaViewportFitChanged(2)
        verify(otherObserver, never()).onThumbnailChange(null)
        verify(otherObserver, never()).onAppPermissionRequest(otherPermissionRequest)
        verify(otherObserver, never()).onContentPermissionRequest(otherPermissionRequest)
        verify(otherObserver, never()).onCancelContentPermissionRequest(otherPermissionRequest)
        verify(otherObserver, never()).onWindowRequest(otherWindowRequest)
        verify(otherObserver, never()).onMediaActivated(mediaSessionController)
        verify(otherObserver, never()).onMediaDeactivated()
        verify(otherObserver, never()).onMediaMetadataChanged(mediaSessionMetadata)
        verify(otherObserver, never()).onMediaFeatureChanged(mediaSessionFeature)
        verify(otherObserver, never()).onMediaPlaybackStateChanged(MediaSession.PlaybackState.PLAYING)
        verify(otherObserver, never()).onMediaPositionStateChanged(mediaSessionPositionState)
        verify(otherObserver, never()).onMediaMuteChanged(true)
        verify(otherObserver, never()).onMediaFullscreenChanged(true, mediaSessionElementMetadata)
    }

    @Test
    fun `observer will not be notified after session is closed`() {
        val session = spy(DummyEngineSession())
        val observer = mock(EngineSession.Observer::class.java)
        val otherHitResult = HitResult.UNKNOWN("file://foobaz")
        val permissionRequest = mock(PermissionRequest::class.java)
        val otherPermissionRequest = mock(PermissionRequest::class.java)
        val windowRequest = mock(WindowRequest::class.java)
        val otherWindowRequest = mock(WindowRequest::class.java)
        val emptyBitmap = spy(Bitmap::class.java)
        val tracker = Tracker("tracker")

        session.register(observer)

        session.notifyInternalObservers { onLocationChange("https://www.mozilla.org") }
        session.notifyInternalObservers { onProgress(25) }
        session.notifyInternalObservers { onLoadingStateChange(true) }
        session.notifyInternalObservers { onSecurityChange(true, "mozilla.org", "issuer") }
        session.notifyInternalObservers { onTrackerBlockingEnabledChange(true) }
        session.notifyInternalObservers { onTrackerBlocked(tracker) }
        session.notifyInternalObservers { onLongPress(unknownHitResult) }
        session.notifyInternalObservers { onDesktopModeChange(true) }
        session.notifyInternalObservers { onFind("search") }
        session.notifyInternalObservers { onFindResult(0, 1, true) }
        session.notifyInternalObservers { onFullScreenChange(true) }
        session.notifyInternalObservers { onMetaViewportFitChanged(1) }
        session.notifyInternalObservers { onThumbnailChange(emptyBitmap) }
        session.notifyInternalObservers { onContentPermissionRequest(permissionRequest) }
        session.notifyInternalObservers { onCancelContentPermissionRequest(permissionRequest) }
        session.notifyInternalObservers { onAppPermissionRequest(permissionRequest) }
        session.notifyInternalObservers { onWindowRequest(windowRequest) }
        session.notifyInternalObservers { onShowDynamicToolbar() }

        session.close()

        var mediaSessionController: MediaSession.Controller = mock()
        val mediaSessionMetadata: MediaSession.Metadata = mock()
        val mediaSessionFeature: MediaSession.Feature = mock()
        val mediaSessionPositionState: MediaSession.PositionState = mock()
        val mediaSessionElementMetadata: MediaSession.ElementMetadata = mock()

        session.notifyInternalObservers { onLocationChange("https://www.firefox.com") }
        session.notifyInternalObservers { onProgress(100) }
        session.notifyInternalObservers { onLoadingStateChange(false) }
        session.notifyInternalObservers { onSecurityChange(false, "", "") }
        session.notifyInternalObservers { onTrackerBlocked(tracker) }
        session.notifyInternalObservers { onTrackerBlockingEnabledChange(false) }
        session.notifyInternalObservers { onLongPress(otherHitResult) }
        session.notifyInternalObservers { onDesktopModeChange(false) }
        session.notifyInternalObservers { onFind("search2") }
        session.notifyInternalObservers { onFindResult(0, 1, false) }
        session.notifyInternalObservers { onFullScreenChange(false) }
        session.notifyInternalObservers { onMetaViewportFitChanged(2) }
        session.notifyInternalObservers { onThumbnailChange(null) }
        session.notifyInternalObservers { onContentPermissionRequest(otherPermissionRequest) }
        session.notifyInternalObservers { onCancelContentPermissionRequest(otherPermissionRequest) }
        session.notifyInternalObservers { onAppPermissionRequest(otherPermissionRequest) }
        session.notifyInternalObservers { onWindowRequest(otherWindowRequest) }
        session.notifyInternalObservers { onMediaActivated(mediaSessionController) }
        session.notifyInternalObservers { onMediaDeactivated() }
        session.notifyInternalObservers { onMediaMetadataChanged(mediaSessionMetadata) }
        session.notifyInternalObservers { onMediaFeatureChanged(mediaSessionFeature) }
        session.notifyInternalObservers { onMediaPlaybackStateChanged(MediaSession.PlaybackState.PLAYING) }
        session.notifyInternalObservers { onMediaPositionStateChanged(mediaSessionPositionState) }
        session.notifyInternalObservers { onMediaMuteChanged(true) }
        session.notifyInternalObservers { onMediaFullscreenChanged(true, mediaSessionElementMetadata) }
        session.notifyInternalObservers { onShowDynamicToolbar() }

        verify(observer).onLocationChange("https://www.mozilla.org")
        verify(observer).onProgress(25)
        verify(observer).onLoadingStateChange(true)
        verify(observer).onSecurityChange(true, "mozilla.org", "issuer")
        verify(observer).onTrackerBlockingEnabledChange(true)
        verify(observer).onTrackerBlocked(tracker)
        verify(observer).onLongPress(unknownHitResult)
        verify(observer).onDesktopModeChange(true)
        verify(observer).onFind("search")
        verify(observer).onFindResult(0, 1, true)
        verify(observer).onFullScreenChange(true)
        verify(observer).onMetaViewportFitChanged(1)
        verify(observer).onThumbnailChange(emptyBitmap)
        verify(observer).onAppPermissionRequest(permissionRequest)
        verify(observer).onContentPermissionRequest(permissionRequest)
        verify(observer).onCancelContentPermissionRequest(permissionRequest)
        verify(observer).onWindowRequest(windowRequest)
        verify(observer).onShowDynamicToolbar()
        verify(observer, never()).onLocationChange("https://www.firefox.com")
        verify(observer, never()).onProgress(100)
        verify(observer, never()).onLoadingStateChange(false)
        verify(observer, never()).onSecurityChange(false, "", "")
        verify(observer, never()).onTrackerBlockingEnabledChange(false)
        verify(observer, never()).onTrackerBlocked(Tracker("Tracker"))
        verify(observer, never()).onLongPress(otherHitResult)
        verify(observer, never()).onDesktopModeChange(false)
        verify(observer, never()).onFind("search2")
        verify(observer, never()).onFindResult(0, 1, false)
        verify(observer, never()).onFullScreenChange(false)
        verify(observer, never()).onMetaViewportFitChanged(2)
        verify(observer, never()).onThumbnailChange(null)
        verify(observer, never()).onAppPermissionRequest(otherPermissionRequest)
        verify(observer, never()).onContentPermissionRequest(otherPermissionRequest)
        verify(observer, never()).onCancelContentPermissionRequest(otherPermissionRequest)
        verify(observer, never()).onWindowRequest(otherWindowRequest)
        verify(observer, never()).onMediaActivated(mediaSessionController)
        verify(observer, never()).onMediaDeactivated()
        verify(observer, never()).onMediaMetadataChanged(mediaSessionMetadata)
        verify(observer, never()).onMediaFeatureChanged(mediaSessionFeature)
        verify(observer, never()).onMediaPlaybackStateChanged(MediaSession.PlaybackState.PLAYING)
        verify(observer, never()).onMediaPositionStateChanged(mediaSessionPositionState)
        verify(observer, never()).onMediaMuteChanged(true)
        verify(observer, never()).onMediaFullscreenChanged(true, mediaSessionElementMetadata)
        verifyNoMoreInteractions(observer)
    }

    @Test
    fun `registered observers are instance specific`() {
        val session = spy(DummyEngineSession())
        val otherSession = spy(DummyEngineSession())
        val permissionRequest = mock(PermissionRequest::class.java)
        val windowRequest = mock(WindowRequest::class.java)
        val emptyBitmap = spy(Bitmap::class.java)
        val observer = mock(EngineSession.Observer::class.java)
        val tracker = Tracker("tracker")
        var mediaSessionController: MediaSession.Controller = mock()
        val mediaSessionMetadata: MediaSession.Metadata = mock()
        val mediaSessionFeature: MediaSession.Feature = mock()
        val mediaSessionPositionState: MediaSession.PositionState = mock()
        val mediaSessionElementMetadata: MediaSession.ElementMetadata = mock()
        session.register(observer)

        otherSession.notifyInternalObservers { onLocationChange("https://www.mozilla.org") }
        otherSession.notifyInternalObservers { onLocationChange("https://www.mozilla.org") }
        otherSession.notifyInternalObservers { onProgress(25) }
        otherSession.notifyInternalObservers { onLoadingStateChange(true) }
        otherSession.notifyInternalObservers { onSecurityChange(true, "mozilla.org", "issuer") }
        otherSession.notifyInternalObservers { onTrackerBlockingEnabledChange(true) }
        otherSession.notifyInternalObservers { onTrackerBlocked(tracker) }
        otherSession.notifyInternalObservers { onLongPress(unknownHitResult) }
        otherSession.notifyInternalObservers { onDesktopModeChange(true) }
        otherSession.notifyInternalObservers { onFind("search") }
        otherSession.notifyInternalObservers { onFindResult(0, 1, true) }
        otherSession.notifyInternalObservers { onFullScreenChange(true) }
        otherSession.notifyInternalObservers { onMetaViewportFitChanged(1) }
        otherSession.notifyInternalObservers { onThumbnailChange(emptyBitmap) }
        otherSession.notifyInternalObservers { onContentPermissionRequest(permissionRequest) }
        otherSession.notifyInternalObservers { onCancelContentPermissionRequest(permissionRequest) }
        otherSession.notifyInternalObservers { onAppPermissionRequest(permissionRequest) }
        otherSession.notifyInternalObservers { onWindowRequest(windowRequest) }
        otherSession.notifyInternalObservers { onMediaActivated(mediaSessionController) }
        otherSession.notifyInternalObservers { onMediaDeactivated() }
        otherSession.notifyInternalObservers { onMediaMetadataChanged(mediaSessionMetadata) }
        otherSession.notifyInternalObservers { onMediaFeatureChanged(mediaSessionFeature) }
        otherSession.notifyInternalObservers { onMediaPlaybackStateChanged(MediaSession.PlaybackState.PLAYING) }
        otherSession.notifyInternalObservers { onMediaPositionStateChanged(mediaSessionPositionState) }
        otherSession.notifyInternalObservers { onMediaMuteChanged(true) }
        otherSession.notifyInternalObservers { onMediaFullscreenChanged(true, mediaSessionElementMetadata) }
        otherSession.notifyInternalObservers { onShowDynamicToolbar() }
        verify(observer, never()).onLocationChange("https://www.mozilla.org")
        verify(observer, never()).onProgress(25)
        verify(observer, never()).onLoadingStateChange(true)
        verify(observer, never()).onSecurityChange(true, "mozilla.org", "issuer")
        verify(observer, never()).onTrackerBlockingEnabledChange(true)
        verify(observer, never()).onTrackerBlocked(tracker)
        verify(observer, never()).onLongPress(unknownHitResult)
        verify(observer, never()).onDesktopModeChange(true)
        verify(observer, never()).onFind("search")
        verify(observer, never()).onFindResult(0, 1, true)
        verify(observer, never()).onFullScreenChange(true)
        verify(observer, never()).onMetaViewportFitChanged(1)
        verify(observer, never()).onThumbnailChange(emptyBitmap)
        verify(observer, never()).onAppPermissionRequest(permissionRequest)
        verify(observer, never()).onContentPermissionRequest(permissionRequest)
        verify(observer, never()).onCancelContentPermissionRequest(permissionRequest)
        verify(observer, never()).onWindowRequest(windowRequest)
        verify(observer, never()).onMediaActivated(mediaSessionController)
        verify(observer, never()).onMediaDeactivated()
        verify(observer, never()).onMediaMetadataChanged(mediaSessionMetadata)
        verify(observer, never()).onMediaFeatureChanged(mediaSessionFeature)
        verify(observer, never()).onMediaPlaybackStateChanged(MediaSession.PlaybackState.PLAYING)
        verify(observer, never()).onMediaPositionStateChanged(mediaSessionPositionState)
        verify(observer, never()).onMediaMuteChanged(true)
        verify(observer, never()).onMediaFullscreenChanged(true, mediaSessionElementMetadata)
        verify(observer, never()).onShowDynamicToolbar()

        session.notifyInternalObservers { onLocationChange("https://www.mozilla.org") }
        session.notifyInternalObservers { onProgress(25) }
        session.notifyInternalObservers { onLoadingStateChange(true) }
        session.notifyInternalObservers { onSecurityChange(true, "mozilla.org", "issuer") }
        session.notifyInternalObservers { onTrackerBlockingEnabledChange(true) }
        session.notifyInternalObservers { onTrackerBlocked(tracker) }
        session.notifyInternalObservers { onLongPress(unknownHitResult) }
        session.notifyInternalObservers { onDesktopModeChange(false) }
        session.notifyInternalObservers { onFind("search") }
        session.notifyInternalObservers { onFindResult(0, 1, true) }
        session.notifyInternalObservers { onFullScreenChange(true) }
        session.notifyInternalObservers { onMetaViewportFitChanged(1) }
        session.notifyInternalObservers { onThumbnailChange(emptyBitmap) }
        session.notifyInternalObservers { onContentPermissionRequest(permissionRequest) }
        session.notifyInternalObservers { onCancelContentPermissionRequest(permissionRequest) }
        session.notifyInternalObservers { onAppPermissionRequest(permissionRequest) }
        session.notifyInternalObservers { onWindowRequest(windowRequest) }
        session.notifyInternalObservers { onMediaActivated(mediaSessionController) }
        session.notifyInternalObservers { onMediaDeactivated() }
        session.notifyInternalObservers { onMediaMetadataChanged(mediaSessionMetadata) }
        session.notifyInternalObservers { onMediaFeatureChanged(mediaSessionFeature) }
        session.notifyInternalObservers { onMediaPlaybackStateChanged(MediaSession.PlaybackState.PLAYING) }
        session.notifyInternalObservers { onMediaPositionStateChanged(mediaSessionPositionState) }
        session.notifyInternalObservers { onMediaMuteChanged(true) }
        session.notifyInternalObservers { onMediaFullscreenChanged(true, mediaSessionElementMetadata) }
        session.notifyInternalObservers { onShowDynamicToolbar() }
        verify(observer, times(1)).onLocationChange("https://www.mozilla.org")
        verify(observer, times(1)).onProgress(25)
        verify(observer, times(1)).onLoadingStateChange(true)
        verify(observer, times(1)).onSecurityChange(true, "mozilla.org", "issuer")
        verify(observer, times(1)).onTrackerBlockingEnabledChange(true)
        verify(observer, times(1)).onTrackerBlocked(tracker)
        verify(observer, times(1)).onLongPress(unknownHitResult)
        verify(observer, times(1)).onDesktopModeChange(false)
        verify(observer, times(1)).onFind("search")
        verify(observer, times(1)).onFindResult(0, 1, true)
        verify(observer, times(1)).onFullScreenChange(true)
        verify(observer, times(1)).onMetaViewportFitChanged(1)
        verify(observer, times(1)).onThumbnailChange(emptyBitmap)
        verify(observer, times(1)).onAppPermissionRequest(permissionRequest)
        verify(observer, times(1)).onContentPermissionRequest(permissionRequest)
        verify(observer, times(1)).onCancelContentPermissionRequest(permissionRequest)
        verify(observer, times(1)).onWindowRequest(windowRequest)
        verify(observer, times(1)).onMediaActivated(mediaSessionController)
        verify(observer, times(1)).onMediaDeactivated()
        verify(observer, times(1)).onMediaMetadataChanged(mediaSessionMetadata)
        verify(observer, times(1)).onMediaFeatureChanged(mediaSessionFeature)
        verify(observer, times(1)).onMediaPlaybackStateChanged(MediaSession.PlaybackState.PLAYING)
        verify(observer, times(1)).onMediaPositionStateChanged(mediaSessionPositionState)
        verify(observer, times(1)).onMediaMuteChanged(true)
        verify(observer, times(1)).onMediaFullscreenChanged(true, mediaSessionElementMetadata)
        verify(observer, times(1)).onShowDynamicToolbar()
        verifyNoMoreInteractions(observer)
    }

    @Test
    fun `all HitResults are supported`() {
        val session = spy(DummyEngineSession())
        val observer = mock(EngineSession.Observer::class.java)
        session.register(observer)

        var hitResult: HitResult = HitResult.UNKNOWN("file://foobaz")
        session.notifyInternalObservers { onLongPress(hitResult) }
        verify(observer, times(1)).onLongPress(hitResult)

        hitResult = HitResult.EMAIL("mailto:asa@mozilla.com")
        session.notifyInternalObservers { onLongPress(hitResult) }
        verify(observer, times(1)).onLongPress(hitResult)

        hitResult = HitResult.PHONE("tel:+1234567890")
        session.notifyInternalObservers { onLongPress(hitResult) }
        verify(observer, times(1)).onLongPress(hitResult)

        hitResult = HitResult.IMAGE_SRC("file.png", "https://mozilla.org")
        session.notifyInternalObservers { onLongPress(hitResult) }
        verify(observer, times(1)).onLongPress(hitResult)

        hitResult = HitResult.IMAGE("file.png")
        session.notifyInternalObservers { onLongPress(hitResult) }
        verify(observer, times(1)).onLongPress(hitResult)

        hitResult = HitResult.AUDIO("file.mp3")
        session.notifyInternalObservers { onLongPress(hitResult) }
        verify(observer, times(1)).onLongPress(hitResult)

        hitResult = HitResult.GEO("geo:1,-1")
        session.notifyInternalObservers { onLongPress(hitResult) }
        verify(observer, times(1)).onLongPress(hitResult)

        hitResult = HitResult.VIDEO("file.mp4")
        session.notifyInternalObservers { onLongPress(hitResult) }
        verify(observer, times(1)).onLongPress(hitResult)
    }

    @Test
    fun `registered observer will be notified about download`() {
        val session = spy(DummyEngineSession())

        val observer = mock(EngineSession.Observer::class.java)
        session.register(observer)

        session.notifyInternalObservers {
            onExternalResource(
                url = "https://download.mozilla.org",
                fileName = "firefox.apk",
                contentLength = 1927392,
                contentType = "application/vnd.android.package-archive",
                cookie = "PHPSESSID=298zf09hf012fh2; csrftoken=u32t4o3tb3gg43; _gat=1;",
                isPrivate = true,
                userAgent = "Components/1.0"
            )
        }

        verify(observer).onExternalResource(
            url = "https://download.mozilla.org",
            fileName = "firefox.apk",
            contentLength = 1927392,
            contentType = "application/vnd.android.package-archive",
            cookie = "PHPSESSID=298zf09hf012fh2; csrftoken=u32t4o3tb3gg43; _gat=1;",
            isPrivate = true,
            userAgent = "Components/1.0"
        )
    }

    @Test
    fun `registered observer will be notified about history state`() {
        val session = spy(DummyEngineSession())

        val observer = mock(EngineSession.Observer::class.java)
        session.register(observer)

        session.notifyInternalObservers {
            onHistoryStateChanged(
                listOf(HistoryItem("Firefox download", "https://download.mozilla.org")),
                currentIndex = 0
            )
        }

        verify(observer).onHistoryStateChanged(
            historyList = listOf(
                HistoryItem("Firefox download", "https://download.mozilla.org")
            ),
            currentIndex = 0
        )
    }

    @Test
    fun `tracking protection policies have correct categories`() {
        val recommendedPolicy = TrackingProtectionPolicy.recommended()

        assertEquals(
            recommendedPolicy.trackingCategories.sumOf { it.id },
            TrackingCategory.RECOMMENDED.id
        )

        assertEquals(recommendedPolicy.cookiePolicy.id, CookiePolicy.ACCEPT_NON_TRACKERS.id)
        assertEquals(recommendedPolicy.cookiePolicyPrivateMode.id, recommendedPolicy.cookiePolicy.id)

        val strictPolicy = TrackingProtectionPolicy.strict()

        assertEquals(
            strictPolicy.trackingCategories.sumOf { it.id },
            TrackingCategory.STRICT.id
        )

        assertEquals(strictPolicy.cookiePolicy.id, CookiePolicy.ACCEPT_NON_TRACKERS.id)
        assertEquals(strictPolicy.cookiePolicyPrivateMode.id, strictPolicy.cookiePolicy.id)

        val nonePolicy = TrackingProtectionPolicy.none()

        assertEquals(
            nonePolicy.trackingCategories.sumOf { it.id },
            TrackingCategory.NONE.id
        )

        assertEquals(nonePolicy.cookiePolicy.id, CookiePolicy.ACCEPT_ALL.id)
        assertEquals(nonePolicy.cookiePolicyPrivateMode.id, CookiePolicy.ACCEPT_ALL.id)

        val newPolicy = TrackingProtectionPolicy.select(
            trackingCategories = arrayOf(
                TrackingCategory.AD,
                TrackingCategory.SOCIAL,
                TrackingCategory.ANALYTICS,
                TrackingCategory.CONTENT,
                TrackingCategory.CRYPTOMINING,
                TrackingCategory.FINGERPRINTING,
                TrackingCategory.TEST
            )
        )

        assertEquals(
            newPolicy.trackingCategories.sumOf { it.id },
            arrayOf(
                TrackingCategory.AD,
                TrackingCategory.SOCIAL,
                TrackingCategory.ANALYTICS,
                TrackingCategory.CONTENT,
                TrackingCategory.CRYPTOMINING,
                TrackingCategory.FINGERPRINTING,
                TrackingCategory.TEST
            ).sumOf { it.id }
        )
    }

    @Test
    fun `tracking protection policies can be specified for session type`() {
        val all = TrackingProtectionPolicy.strict()
        val selected = TrackingProtectionPolicy.select(
            trackingCategories = arrayOf(TrackingCategory.AD)

        )

        // Tracking protection policies should be applied to all sessions by default
        assertTrue(all.useForPrivateSessions)
        assertTrue(all.useForRegularSessions)
        assertTrue(selected.useForPrivateSessions)
        assertTrue(selected.useForRegularSessions)

        val allForPrivate = TrackingProtectionPolicy.strict().forPrivateSessionsOnly()
        assertTrue(allForPrivate.useForPrivateSessions)
        assertFalse(allForPrivate.useForRegularSessions)

        val selectedForRegular =
            TrackingProtectionPolicy.select(trackingCategories = arrayOf(TrackingCategory.AD))
                .forRegularSessionsOnly()

        assertTrue(selectedForRegular.useForRegularSessions)
        assertFalse(selectedForRegular.useForPrivateSessions)
    }

    @Test
    fun `load flags can be selected`() {
        assertEquals(LoadUrlFlags.NONE, LoadUrlFlags.none().value)
        assertEquals(LoadUrlFlags.ALL, LoadUrlFlags.all().value)
        assertEquals(LoadUrlFlags.EXTERNAL, LoadUrlFlags.external().value)

        assertTrue(LoadUrlFlags.all().contains(LoadUrlFlags.select(LoadUrlFlags.BYPASS_CACHE).value))
        assertTrue(LoadUrlFlags.all().contains(LoadUrlFlags.select(LoadUrlFlags.BYPASS_PROXY).value))
        assertTrue(LoadUrlFlags.all().contains(LoadUrlFlags.select(LoadUrlFlags.EXTERNAL).value))
        assertTrue(LoadUrlFlags.all().contains(LoadUrlFlags.select(LoadUrlFlags.ALLOW_POPUPS).value))
        assertTrue(LoadUrlFlags.all().contains(LoadUrlFlags.select(LoadUrlFlags.BYPASS_CLASSIFIER).value))
        assertTrue(LoadUrlFlags.all().contains(LoadUrlFlags.select(LoadUrlFlags.LOAD_FLAGS_FORCE_ALLOW_DATA_URI).value))
        assertTrue(LoadUrlFlags.all().contains(LoadUrlFlags.select(LoadUrlFlags.LOAD_FLAGS_REPLACE_HISTORY).value))

        val flags = LoadUrlFlags.select(LoadUrlFlags.EXTERNAL)
        assertTrue(flags.contains(LoadUrlFlags.EXTERNAL))
        assertFalse(flags.contains(LoadUrlFlags.ALLOW_POPUPS))
        assertFalse(flags.contains(LoadUrlFlags.BYPASS_CACHE))
        assertFalse(flags.contains(LoadUrlFlags.BYPASS_CLASSIFIER))
        assertFalse(flags.contains(LoadUrlFlags.BYPASS_PROXY))
        assertFalse(flags.contains(LoadUrlFlags.LOAD_FLAGS_FORCE_ALLOW_DATA_URI))
        assertFalse(flags.contains(LoadUrlFlags.LOAD_FLAGS_REPLACE_HISTORY))
    }

    @Test
    fun `engine observer has default methods`() {
        val defaultObserver = object : EngineSession.Observer {}

        defaultObserver.onTitleChange("")
        defaultObserver.onLocationChange("")
        defaultObserver.onPreviewImageChange("")
        defaultObserver.onLongPress(HitResult.UNKNOWN(""))
        defaultObserver.onExternalResource("", "")
        defaultObserver.onDesktopModeChange(true)
        defaultObserver.onSecurityChange(true)
        defaultObserver.onTrackerBlocked(mock())
        defaultObserver.onTrackerLoaded(mock())
        defaultObserver.onTrackerBlockingEnabledChange(true)
        defaultObserver.onExcludedOnTrackingProtectionChange(true)
        defaultObserver.onFindResult(0, 0, false)
        defaultObserver.onFind("text")
        defaultObserver.onExternalResource("", "")
        defaultObserver.onNavigationStateChange()
        defaultObserver.onProgress(123)
        defaultObserver.onLoadingStateChange(true)
        defaultObserver.onThumbnailChange(spy(Bitmap::class.java))
        defaultObserver.onFullScreenChange(true)
        defaultObserver.onMetaViewportFitChanged(1)
        defaultObserver.onAppPermissionRequest(mock(PermissionRequest::class.java))
        defaultObserver.onContentPermissionRequest(mock(PermissionRequest::class.java))
        defaultObserver.onCancelContentPermissionRequest(mock(PermissionRequest::class.java))
        defaultObserver.onWindowRequest(mock(WindowRequest::class.java))
        defaultObserver.onCrash()
        defaultObserver.onShowDynamicToolbar()
    }

    @Test
    fun `engine doesn't notify observers of clear data`() {
        val session = spy(DummyEngineSession())
        val observer = mock(EngineSession.Observer::class.java)
        session.register(observer)

        session.clearData()

        verifyNoInteractions(observer)
    }

    @Test
    fun `trackingProtectionPolicy contains should work with compound categories`() {
        val recommendedPolicy = TrackingProtectionPolicy.recommended()

        assertTrue(recommendedPolicy.contains(TrackingCategory.RECOMMENDED))
        assertTrue(recommendedPolicy.contains(TrackingCategory.AD))
        assertTrue(recommendedPolicy.contains(TrackingCategory.ANALYTICS))
        assertTrue(recommendedPolicy.contains(TrackingCategory.SOCIAL))
        assertTrue(recommendedPolicy.contains(TrackingCategory.TEST))
        assertTrue(recommendedPolicy.contains(TrackingCategory.FINGERPRINTING))

        assertTrue(recommendedPolicy.contains(TrackingCategory.CRYPTOMINING))
        assertFalse(recommendedPolicy.contains(TrackingCategory.CONTENT))

        val strictPolicy = TrackingProtectionPolicy.strict()

        assertTrue(strictPolicy.contains(TrackingCategory.RECOMMENDED))
        assertTrue(strictPolicy.contains(TrackingCategory.AD))
        assertTrue(strictPolicy.contains(TrackingCategory.ANALYTICS))
        assertTrue(strictPolicy.contains(TrackingCategory.SOCIAL))
        assertTrue(strictPolicy.contains(TrackingCategory.TEST))
        assertTrue(strictPolicy.contains(TrackingCategory.CRYPTOMINING))
        assertFalse(strictPolicy.contains(TrackingCategory.CONTENT))
    }

    @Test
    fun `TrackingSessionPolicies retain all expected fields during privacy transformations`() {
        val strict = TrackingProtectionPolicy.strict()
        val default = TrackingProtectionPolicy.recommended()
        val custom = TrackingProtectionPolicy.select(
            trackingCategories = emptyArray(),
            cookiePolicy = CookiePolicy.ACCEPT_ONLY_FIRST_PARTY,
            strictSocialTrackingProtection = true
        )
        val changedFields = listOf("useForPrivateSessions", "useForRegularSessions")

        fun checkSavedFields(expect: TrackingProtectionPolicy, actual: TrackingProtectionPolicy) {
            TrackingProtectionPolicy::class.java.declaredMethods
                .filter { method -> changedFields.all { !method.name.lowercase().contains(it.lowercase()) } }
                .filter { it.parameterCount == 0 } // Only keep getters
                .filter { it.modifiers and Modifier.PUBLIC != 0 }
                .filter { it.modifiers and Modifier.STATIC == 0 }
                .forEach {
                    assertEquals(it.invoke(expect), it.invoke(actual))
                }
        }

        listOf(
            strict,
            default,
            custom
        ).forEach {
            checkSavedFields(it, it.forPrivateSessionsOnly())
            checkSavedFields(it, it.forRegularSessionsOnly())
        }
    }

    @Test
    fun `engine session observer has default methods`() {
        val observer = object : EngineSession.Observer { }
        val bitmap: Bitmap = mock()
        val permissionRequest = mock(PermissionRequest::class.java)
        val windowRequest = mock(WindowRequest::class.java)
        val tracker: Tracker = mock()

        observer.onLocationChange("https://www.mozilla.org")
        observer.onLocationChange("https://www.firefox.com")
        observer.onProgress(25)
        observer.onProgress(100)
        observer.onLoadingStateChange(true)
        observer.onSecurityChange(true, "mozilla.org", "issuer")
        observer.onTrackerBlockingEnabledChange(true)
        observer.onTrackerBlocked(tracker)
        observer.onExcludedOnTrackingProtectionChange(true)
        observer.onLongPress(unknownHitResult)
        observer.onDesktopModeChange(true)
        observer.onFind("search")
        observer.onFindResult(0, 1, true)
        observer.onFullScreenChange(true)
        observer.onMetaViewportFitChanged(1)
        observer.onThumbnailChange(bitmap)
        observer.onContentPermissionRequest(permissionRequest)
        observer.onCancelContentPermissionRequest(permissionRequest)
        observer.onAppPermissionRequest(permissionRequest)
        observer.onWindowRequest(windowRequest)
        observer.onCrash()
        observer.onLoadRequest("https://www.mozilla.org", true, true)
        observer.onLaunchIntentRequest("https://www.mozilla.org", null)
        observer.onProcessKilled()
        observer.onShowDynamicToolbar()
    }
}

open class DummyEngineSession : EngineSession() {
    override val settings: Settings
        get() = mock(Settings::class.java)

    override fun restoreState(state: EngineSessionState): Boolean { return false }

    override fun loadUrl(
        url: String,
        parent: EngineSession?,
        flags: LoadUrlFlags,
        additionalHeaders: Map<String, String>?
    ) {}

    override fun loadData(data: String, mimeType: String, encoding: String) {}

    override fun stopLoading() {}

    override fun reload(flags: LoadUrlFlags) {}

    override fun goBack() {}

    override fun goForward() {}

    override fun goToHistoryIndex(index: Int) {}

    override fun updateTrackingProtection(policy: TrackingProtectionPolicy) {}

    override fun toggleDesktopMode(enable: Boolean, reload: Boolean) {}

    override fun findAll(text: String) {}

    override fun findNext(forward: Boolean) {}

    override fun clearFindMatches() {}

    override fun exitFullScreenMode() {}

    override fun purgeHistory() {}

    // Helper method to access the protected method from test cases.
    fun notifyInternalObservers(block: Observer.() -> Unit) {
        notifyObservers(block)
    }
}
