test(onboarding): grant POST_NOTIFICATIONS in onboarding E2E to fix API 33+ flow

Moving the notification-permission request into OnboardingWelcomeScreen
(#151) means the system POST_NOTIFICATIONS dialog now pops when that
screen composes. On API 33+ (where it became a runtime permission) the
dialog backgrounded the activity mid-flow, so OnboardingFlowTest failed
with "No compose hierarchies found" on API 33/34/35/36/37 while API
29–32 stayed green.

Pre-grant the permission via a GrantPermissionRule so the dialog never
appears during the flow, guarded for API 33+ (the permission does not
exist below TIRAMISU, so grant nothing there to avoid erroring on older
devices). Adds the androidx.test:rules dependency that provides the rule.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

app/build.gradle.kts

@@ -227,6 +227,7 @@ dependencies {
     androidTestImplementation(libs.androidx.junit)
     androidTestImplementation(libs.androidx.espresso.core)
     androidTestImplementation(libs.androidx.espresso.intents)
+    androidTestImplementation(libs.androidx.test.rules)
     androidTestImplementation(platform(libs.androidx.compose.bom))
     androidTestImplementation(libs.androidx.compose.ui.test.junit4)
     androidTestImplementation(libs.androidx.room.testing)

app/src/androidTest/kotlin/org/libremail/ui/onboarding/OnboardingFlowTest.kt

@@ -1,6 +1,8 @@
 // SPDX-License-Identifier: GPL-3.0-or-later
 package org.libremail.ui.onboarding
 
+import android.Manifest
+import android.os.Build
 import androidx.activity.ComponentActivity
 import androidx.compose.runtime.remember
 import androidx.compose.ui.platform.LocalContext
@@ -18,6 +20,7 @@ import androidx.navigation.compose.composable
 import androidx.navigation.compose.rememberNavController
 import androidx.navigation.navArgument
 import androidx.test.ext.junit.runners.AndroidJUnit4
+import androidx.test.rule.GrantPermissionRule
 import org.junit.Rule
 import org.junit.Test
 import org.junit.runner.RunWith
@@ -54,6 +57,19 @@ class OnboardingFlowTest {
     @get:Rule
     val composeTestRule = createAndroidComposeRule<ComponentActivity>()
 
+    // OnboardingWelcomeScreen requests POST_NOTIFICATIONS when it first composes (#151). On API 33+
+    // that runtime dialog would pop over the test, backgrounding the activity and leaving the compose
+    // rule with "No compose hierarchies found". Pre-grant it so the flow runs uninterrupted; the
+    // permission only exists on API 33+, so below TIRAMISU grant nothing (granting a nonexistent
+    // permission errors on older devices).
+    @get:Rule
+    val notificationPermission: GrantPermissionRule =
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.TIRAMISU) {
+            GrantPermissionRule.grant(Manifest.permission.POST_NOTIFICATIONS)
+        } else {
+            GrantPermissionRule.grant()
+        }
+
     private fun string(resId: Int, vararg args: Any) = composeTestRule.activity.getString(resId, *args)
 
     // Generous cap for the slow, animation-disabled CI matrix emulators; waitUntil returns as soon

gradle/libs.versions.toml

@@ -26,6 +26,7 @@ angusMail = "2.0.5"
 junit = "4.13.2"
 androidxJunit = "1.2.1"
 espresso = "3.7.0"
+androidxTestRules = "1.7.0"
 turbine = "1.2.1"
 mockk = "1.14.11"
 greenmail = "2.1.9"
@@ -110,6 +111,7 @@ greenmail = { group = "com.icegreen", name = "greenmail", version.ref = "greenma
 androidx-junit = { group = "androidx.test.ext", name = "junit", version.ref = "androidxJunit" }
 androidx-espresso-core = { group = "androidx.test.espresso", name = "espresso-core", version.ref = "espresso" }
 androidx-espresso-intents = { group = "androidx.test.espresso", name = "espresso-intents", version.ref = "espresso" }
+androidx-test-rules = { group = "androidx.test", name = "rules", version.ref = "androidxTestRules" }
 
 [plugins]
 android-application = { id = "com.android.application", version.ref = "agp" }