Make avd_test less flaky

.github/workflows/build.yml

@@ -22,7 +22,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os: [ubuntu-latest, windows-latest, macos-latest]
+        os: [ubuntu-latest, windows-latest, macos-13]
     steps:
       - name: Check out
         uses: actions/checkout@v3
@@ -98,7 +98,7 @@ jobs:
 
   test:
     name: Test on ${{ matrix.api }}
-    runs-on: macos-latest
+    runs-on: macos-13
     needs: build
     strategy:
       fail-fast: false
@@ -111,12 +111,6 @@ jobs:
         with:
           fetch-depth: 0
 
-      - name: Set up JDK 17
-        uses: actions/setup-java@v3
-        with:
-          distribution: "temurin"
-          java-version: "17"
-
       - name: Set up Python 3
         uses: actions/setup-python@v4
         with:

scripts/avd_test.sh

@@ -92,11 +92,24 @@ wait_emu() {
   timeout $boot_timeout bash -c $wait_fn &
   local wait_pid=$!
 
-  # Handle the case when emulator dies earlier than wait
+  # Handle the case when emulator dies earlier than timeout
   wait -p which_pid -n $emu_pid $wait_pid
   [ $which_pid -eq $wait_pid ]
 }
 
+run_content_cmd() {
+  while true; do
+    local out=$(adb shell echo "'content call --uri content://com.topjohnwu.magisk.provider --method $1'" \| /system/xbin/su | tee /dev/fd/2)
+    if ! grep -q 'Bundle\[' <<< "$out"; then
+      # The call failed, wait a while and retry later
+      sleep 30
+    else
+      grep -q 'result=true' <<< "$out"
+      return $?
+    fi
+  done
+}
+
 test_emu() {
   local variant=$1
 
@@ -110,17 +123,14 @@ test_emu() {
 
   # Install the Magisk app
   adb install -r -g out/app-${variant}.apk
-  adb shell appops set com.topjohnwu.magisk REQUEST_INSTALL_PACKAGES allow
 
   # Use the app to run setup and reboot
-  adb shell echo "'content call --uri content://com.topjohnwu.magisk.provider --method setup'" \| /system/xbin/su \
-    | tee /dev/fd/2 | grep -q 'result=true'
+  run_content_cmd setup
   adb reboot
   wait_emu wait_for_boot
 
   # Run app tests
-  adb shell echo "'content call --uri content://com.topjohnwu.magisk.provider --method test'" \| /system/xbin/su \
-    | tee /dev/fd/2 | grep -q 'result=true'
+  run_content_cmd test
   adb shell echo "'su -c id'" \| /system/xbin/su 2000 | tee /dev/fd/2 | grep -q 'uid=0'
 }