Adding back screenshot test to Settings.

Test: atest SettingsScreenshotTests
Fixes: 307356833
Change-Id: I80b32cd40155d56e38d41d5f6d52e4c5d5ef715c

res/layout/fingerprint_v2_enroll_introduction.xml

@@ -24,6 +24,7 @@
 
     <LinearLayout
         style="@style/SudContentFrame"
+        android:id="@+id/enroll_intro_content_view"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:clipChildren="false"

src/com/android/settings/biometrics/fingerprint2/ui/enrollment/fragment/FingerprintEnrollIntroV2Fragment.kt

@@ -186,6 +186,9 @@ class FingerprintEnrollIntroV2Fragment() : Fragment(R.layout.fingerprint_v2_enro
       return view
     }
 
+  /**
+   * TODO (b/305269201): This link isn't displaying for screenshot tests.
+   */
   private fun setFooterLink(view: View) {
     val footerLink: TextView = view.requireViewById(R.id.footer_learn_more)
     footerLink.movementMethod = LinkMovementMethod.getInstance()

tests/screenshot/Android.bp

@@ -0,0 +1,70 @@
+//
+// Copyright (C) 2023 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+android_app {
+    name: "ScreenshotTestStub",
+    defaults: [
+        "SettingsLibDefaults",
+    ],
+    platform_apis: true,
+    certificate: "platform",
+    privileged: true,
+    use_resource_processor: true,
+
+    static_libs: [
+        "Settings-core",
+        "androidx.fragment_fragment-testing",
+        "androidx.fragment_fragment",
+        "androidx.test.runner",
+        "androidx.test.core",
+    ],
+    uses_libs: ["org.apache.http.legacy"],
+
+    aaptflags: ["--extra-packages com.android.settings"],
+    manifest: "AndroidManifest.xml",
+}
+
+android_test {
+    name: "SettingsScreenshotTests",
+    platform_apis: true,
+    certificate: "platform",
+    test_suites: ["device-tests"],
+    srcs: [
+        "src/**/*.kt",
+    ],
+    static_libs: [
+        "androidx.fragment_fragment-testing",
+        "androidx.fragment_fragment",
+        "androidx.test.rules",
+        "androidx.test.ext.junit",
+        "platform-screenshot-diff-core",
+        "Settings-testutils2",
+        "androidx.test.core",
+        "androidx.test.espresso.core",
+        "kotlinx-coroutines-android",
+        "androidx.lifecycle_lifecycle-runtime-testing",
+        "kotlinx_coroutines_test",
+        "Settings-core",
+        "androidx.test.runner",
+    ],
+    uses_libs: ["org.apache.http.legacy"],
+    compile_multilib: "both",
+    manifest: "AndroidManifest.xml",
+    test_config: "AndroidTest.xml",
+    use_embedded_native_libs: false,
+    asset_dirs: ["assets"],
+    instrumentation_for: "ScreenshotTestStub",
+    data: [":ScreenshotTestStub"],
+}

tests/screenshot/AndroidManifest.xml

@@ -0,0 +1,47 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+     Copyright (C) 2023 The Android Open Source Project
+
+     Licensed under the Apache License, Version 2.0 (the "License");
+     you may not use this file except in compliance with the License.
+     You may obtain a copy of the License at
+
+          http://www.apache.org/licenses/LICENSE-2.0
+
+     Unless required by applicable law or agreed to in writing, software
+     distributed under the License is distributed on an "AS IS" BASIS,
+     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+     See the License for the specific language governing permissions and
+     limitations under the License.
+-->
+
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools"
+    package="com.android.settings.tests.screenshot"
+    >
+
+    <application android:debuggable="true">
+        <provider
+            android:name="com.android.settings.slices.SettingsSliceProvider"
+            android:authorities="com.android.settings.tests.screenshot.disabled"
+            android:enabled="false"
+            tools:node="remove"
+            tools:replace="android:authorities" />
+
+    </application>
+
+    <uses-permission android:name="android.permission.PACKAGE_USAGE_STATS" />
+    <uses-permission android:name="android.permission.WRITE_SECURE_SETTINGS" />
+    <uses-permission android:name="android.permission.READ_LOGS" />
+    <uses-permission android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS" />
+    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
+    <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
+    <uses-permission android:name="android.permission.MANAGE_EXTERNAL_STORAGE" />
+    <uses-permission android:name="android.permission.READ_DEVICE_CONFIG" />
+
+    <instrumentation
+        android:name="androidx.test.runner.AndroidJUnitRunner"
+        android:label="Android Settings Screenshot tests"
+        android:targetPackage="com.android.settings.tests.screenshot" />
+
+</manifest>

tests/screenshot/AndroidTest.xml

@@ -0,0 +1,36 @@
+<!--
+  ~ Copyright (C) 2023 The Android Open Source Project
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~      http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+  -->
+
+<configuration description="Runs settings screendiff tests.">
+    <option name="test-suite-tag" value="apct-instrumentation" />
+    <option name="test-suite-tag" value="apct" />
+    <target_preparer class="com.android.tradefed.targetprep.DeviceSetup">
+        <option name="optimized-property-setting" value="true" />
+    </target_preparer>
+    <target_preparer class="com.android.tradefed.targetprep.suite.SuiteApkInstaller">
+        <option name="cleanup-apks" value="true" />
+        <option name="test-file-name" value="SettingsScreenshotTests.apk" />
+    </target_preparer>
+    <metrics_collector class="com.android.tradefed.device.metric.FilePullerLogCollector">
+        <option name="directory-keys"
+            value="/data/user/0/com.android.settings.tests.screenshot/" />
+        <option name="collect-on-run-ended-only" value="true" />
+    </metrics_collector>
+    <test class="com.android.tradefed.testtype.AndroidJUnitTest">
+        <option name="package" value="com.android.settings.tests.screenshot" />
+        <option name="runner" value="androidx.test.runner.AndroidJUnitRunner" />
+    </test>
+</configuration>

tests/screenshot/src/com/android/settings/tests/screenshot/BasicScreenshotTest.kt

@@ -0,0 +1,147 @@
+/*
+ * Copyright (C) 2023 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.settings.tests.screenshot
+
+import android.content.Context
+import android.graphics.Bitmap
+import android.graphics.Canvas
+import android.graphics.Color
+import android.os.Bundle
+import android.view.View
+import androidx.fragment.app.testing.FragmentScenario
+import androidx.fragment.app.testing.launchFragmentInContainer
+import androidx.lifecycle.ViewModel
+import androidx.lifecycle.ViewModelProvider
+import androidx.test.core.app.ApplicationProvider
+import androidx.test.ext.junit.runners.AndroidJUnit4
+import androidx.test.platform.app.InstrumentationRegistry
+import com.android.settings.R
+import com.android.settings.biometrics.fingerprint2.shared.model.Default
+import com.android.settings.biometrics.fingerprint2.ui.enrollment.fragment.FingerprintEnrollIntroV2Fragment
+import com.android.settings.biometrics.fingerprint2.ui.enrollment.viewmodel.FingerprintEnrollNavigationViewModel
+import com.android.settings.biometrics.fingerprint2.ui.enrollment.viewmodel.FingerprintEnrollViewModel
+import com.android.settings.biometrics.fingerprint2.ui.enrollment.viewmodel.FingerprintGatekeeperViewModel
+import com.android.settings.biometrics.fingerprint2.ui.enrollment.viewmodel.FingerprintScrollViewModel
+import com.android.settings.biometrics.fingerprint2.ui.enrollment.viewmodel.GatekeeperInfo
+import com.android.settings.biometrics.fingerprint2.ui.enrollment.viewmodel.NavState
+import com.android.settings.biometrics.fingerprint2.ui.enrollment.viewmodel.Start
+import com.android.settings.testutils2.FakeFingerprintManagerInteractor
+import kotlinx.coroutines.test.StandardTestDispatcher
+import org.junit.Before
+import org.junit.Rule
+import org.junit.Test
+import org.junit.runner.RunWith
+import platform.test.screenshot.GoldenImagePathManager
+import platform.test.screenshot.ScreenshotTestRule
+import platform.test.screenshot.matchers.MSSIMMatcher
+
+@RunWith(AndroidJUnit4::class)
+class BasicScreenshotTest {
+  @Rule
+  @JvmField
+  var rule: ScreenshotTestRule =
+    ScreenshotTestRule(
+      GoldenImagePathManager(
+        InstrumentationRegistry.getInstrumentation().getContext(),
+        InstrumentationRegistry.getInstrumentation()
+          .getTargetContext()
+          .getFilesDir()
+          .getAbsolutePath() + "/settings_screenshots"
+      )
+    )
+
+  private var context: Context = ApplicationProvider.getApplicationContext()
+  private var interactor = FakeFingerprintManagerInteractor()
+
+  private val gatekeeperViewModel =
+    FingerprintGatekeeperViewModel(
+      GatekeeperInfo.GatekeeperPasswordInfo(byteArrayOf(1, 2, 3), 100L),
+      interactor
+    )
+
+  private val backgroundDispatcher = StandardTestDispatcher()
+  private lateinit var fragmentScenario: FragmentScenario<FingerprintEnrollIntroV2Fragment>
+  val navState = NavState(true)
+
+  private val navigationViewModel = FingerprintEnrollNavigationViewModel(
+      backgroundDispatcher,
+      interactor,
+      gatekeeperViewModel,
+      Start.next(navState),
+      navState,
+      Default,
+    )
+  private var fingerprintViewModel = FingerprintEnrollViewModel(
+      interactor, gatekeeperViewModel, navigationViewModel,
+    )
+  private var fingerprintScrollViewModel = FingerprintScrollViewModel()
+
+  @Before
+  fun setup() {
+    val factory =
+      object : ViewModelProvider.Factory {
+        @Suppress("UNCHECKED_CAST")
+        override fun <T : ViewModel> create(
+          modelClass: Class<T>,
+        ): T {
+          return when (modelClass) {
+            FingerprintEnrollViewModel::class.java -> fingerprintViewModel
+            FingerprintScrollViewModel::class.java -> fingerprintScrollViewModel
+            FingerprintEnrollNavigationViewModel::class.java -> navigationViewModel
+            FingerprintGatekeeperViewModel::class.java -> gatekeeperViewModel
+            else -> null
+          }
+            as T
+        }
+      }
+
+    fragmentScenario =
+      launchFragmentInContainer(Bundle(), R.style.SudThemeGlif) {
+        FingerprintEnrollIntroV2Fragment(factory)
+      }
+  }
+
+  /** Renders a [view] into a [Bitmap]. */
+  private fun viewToBitmap(view: View): Bitmap {
+    val bitmap =
+      Bitmap.createBitmap(
+        view.measuredWidth,
+        view.measuredHeight,
+        Bitmap.Config.ARGB_8888,
+      )
+    val canvas = Canvas(bitmap)
+    view.draw(canvas)
+    return bitmap
+  }
+
+  @Test
+  fun testEnrollIntro() {
+    fragmentScenario.onFragment { fragment ->
+      val view = fragment.requireView().findViewById<View>(R.id.enroll_intro_content_view)!!
+      view.setBackgroundColor(Color.BLACK)
+    }
+    fragmentScenario.onFragment { fragment ->
+      val view = fragment.requireView().findViewById<View>(R.id.enroll_intro_content_view)!!
+      rule.assertBitmapAgainstGolden(
+        viewToBitmap(view),
+        "fp_enroll_intro",
+        MSSIMMatcher()
+      )
+    }
+
+  }
+}