Bug 1830988 - Renew telemetry probes expiring in v116
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/* 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.telemetry
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import androidx.lifecycle.DefaultLifecycleObserver
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import androidx.lifecycle.LifecycleObserver
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import androidx.lifecycle.LifecycleOwner
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import mozilla.components.browser.state.store.BrowserStore
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import mozilla.components.support.base.android.Clock
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import org.mozilla.fenix.GleanMetrics.EngineTab as EngineMetrics
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import org.mozilla.fenix.GleanMetrics.EngineTab.ForegroundMetricsExtra as MetricsExtra
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/**
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* [LifecycleObserver] to used on the process lifecycle to measure the amount of tabs getting killed
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* while the app is in the background.
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*
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* See:
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* - https://github.com/mozilla-mobile/android-components/issues/9624
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* - https://github.com/mozilla-mobile/android-components/issues/9997
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*/
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class TelemetryLifecycleObserver(
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private val store: BrowserStore,
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) : DefaultLifecycleObserver {
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private var pausedState: TabState? = null
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override fun onPause(owner: LifecycleOwner) {
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pausedState = createTabState()
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}
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override fun onResume(owner: LifecycleOwner) {
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val lastState = pausedState ?: return
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val currentState = createTabState()
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EngineMetrics.foregroundMetrics.record(
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MetricsExtra(
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backgroundActiveTabs = lastState.activeEngineTabs.toString(),
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backgroundCrashedTabs = lastState.crashedTabs.toString(),
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backgroundTotalTabs = lastState.totalTabs.toString(),
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foregroundActiveTabs = currentState.activeEngineTabs.toString(),
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foregroundCrashedTabs = currentState.crashedTabs.toString(),
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foregroundTotalTabs = currentState.totalTabs.toString(),
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timeInBackground = (currentState.timestamp - lastState.timestamp).toString(),
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),
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)
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pausedState = null
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}
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private fun createTabState(): TabState {
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val tabsWithEngineSession = store.state.tabs
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.filter { tab -> tab.engineState.engineSession != null }
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.filter { tab -> !tab.engineState.crashed }
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.count()
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val totalTabs = store.state.tabs.count()
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val crashedTabs = store.state.tabs
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.filter { tab -> tab.engineState.crashed }
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.count()
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return TabState(
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activeEngineTabs = tabsWithEngineSession,
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totalTabs = totalTabs,
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crashedTabs = crashedTabs,
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)
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}
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private data class TabState(
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val timestamp: Long = Clock.elapsedRealtime(),
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val totalTabs: Int,
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val crashedTabs: Int,
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val activeEngineTabs: Int,
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)
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}
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@ -1,123 +0,0 @@
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/* 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.telemetry
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import androidx.test.core.app.ApplicationProvider
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import io.mockk.mockk
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import mozilla.components.browser.state.action.EngineAction
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import mozilla.components.browser.state.engine.EngineMiddleware
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import mozilla.components.browser.state.state.BrowserState
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import mozilla.components.browser.state.state.createTab
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import mozilla.components.browser.state.store.BrowserStore
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import mozilla.components.service.glean.testing.GleanTestRule
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import mozilla.components.support.base.android.Clock
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import mozilla.components.support.test.ext.joinBlocking
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import org.junit.After
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import org.junit.Assert.assertEquals
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import org.junit.Assert.assertNotNull
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import org.junit.Assert.assertNull
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import org.junit.Before
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import org.junit.Rule
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import org.junit.Test
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import org.junit.runner.RunWith
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import org.mozilla.fenix.helpers.FenixRobolectricTestRunner
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import org.mozilla.fenix.GleanMetrics.EngineTab as EngineMetrics
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@RunWith(FenixRobolectricTestRunner::class)
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class TelemetryLifecycleObserverTest {
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@get:Rule
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val gleanRule = GleanTestRule(ApplicationProvider.getApplicationContext())
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private val clock = FakeClock()
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@Before
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fun setUp() {
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Clock.delegate = clock
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}
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@After
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fun tearDown() {
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Clock.reset()
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}
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@Test
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fun `resume without a pause does not record any metrics`() {
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val store = BrowserStore()
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val observer = TelemetryLifecycleObserver(store)
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observer.onResume(mockk())
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assertNull(EngineMetrics.foregroundMetrics.testGetValue())
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}
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@Test
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fun `resume after pause records metrics`() {
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val store = BrowserStore()
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val observer = TelemetryLifecycleObserver(store)
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observer.onPause(mockk())
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clock.elapsedTime = 550
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observer.onResume(mockk())
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assertNotNull(EngineMetrics.foregroundMetrics.testGetValue())
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val metrics = EngineMetrics.foregroundMetrics.testGetValue()!!
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assertEquals(1, metrics.size)
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val metric = metrics[0]
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assertNotNull(metric.extra)
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assertEquals("550", metric.extra!!["time_in_background"])
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}
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@Test
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fun `resume records expected values`() {
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val store = BrowserStore(
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initialState = BrowserState(
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tabs = listOf(
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createTab("https://www.mozilla.org", id = "mozilla", engineSession = mockk(relaxed = true)),
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createTab("https://news.google.com", id = "news"),
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createTab("https://theverge.com", id = "theverge", engineSession = mockk(relaxed = true)),
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createTab("https://www.google.com", id = "google", engineSession = mockk(relaxed = true)),
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createTab("https://getpocket.com", id = "pocket", crashed = true),
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),
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),
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middleware = EngineMiddleware.create(engine = mockk()),
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)
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val observer = TelemetryLifecycleObserver(store)
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clock.elapsedTime = 120
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observer.onPause(mockk())
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store.dispatch(
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EngineAction.KillEngineSessionAction("theverge"),
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).joinBlocking()
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store.dispatch(
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EngineAction.SuspendEngineSessionAction("mozilla"),
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).joinBlocking()
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clock.elapsedTime = 10340
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observer.onResume(mockk())
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assertNotNull(EngineMetrics.foregroundMetrics.testGetValue())
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val metrics = EngineMetrics.foregroundMetrics.testGetValue()!!
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assertEquals(1, metrics.size)
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val metric = metrics[0]
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assertNotNull(metric.extra)
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assertEquals("10220", metric.extra!!["time_in_background"])
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assertEquals("3", metric.extra!!["background_active_tabs"])
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assertEquals("1", metric.extra!!["background_crashed_tabs"])
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assertEquals("5", metric.extra!!["background_total_tabs"])
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assertEquals("1", metric.extra!!["foreground_active_tabs"])
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assertEquals("1", metric.extra!!["foreground_crashed_tabs"])
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assertEquals("5", metric.extra!!["foreground_total_tabs"])
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}
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}
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