Move test zip file to assets

This is a no-op refactoring which move test data from resources
to assets, and repacking zip file to contain netstats sub-folder.

This is needed for later patches to put more test data points,
and having easier way to access them in batch.

Test: atest ConnectivityBenchmarkTests
Bug: 269409485
Change-Id: I1d09ac0187c9ce12982161243929d8e10483da45
diff --git a/tests/benchmark/Android.bp b/tests/benchmark/Android.bp
index 77383ad..6ea5347 100644
--- a/tests/benchmark/Android.bp
+++ b/tests/benchmark/Android.bp
@@ -29,6 +29,7 @@
         "src/**/*.kt",
         "src/**/*.aidl",
     ],
+    asset_dirs: ["assets"],
     static_libs: [
         "androidx.test.rules",
         "mockito-target-minus-junit4",
diff --git a/tests/benchmark/res/raw/netstats-many-uids-zip b/tests/benchmark/assets/netstats-many-uids.zip
similarity index 98%
rename from tests/benchmark/res/raw/netstats-many-uids-zip
rename to tests/benchmark/assets/netstats-many-uids.zip
index 22e8254..9554aaa 100644
--- a/tests/benchmark/res/raw/netstats-many-uids-zip
+++ b/tests/benchmark/assets/netstats-many-uids.zip
Binary files differ
diff --git a/tests/benchmark/src/android/net/netstats/benchmarktests/NetworkStatsTest.kt b/tests/benchmark/src/android/net/netstats/benchmarktests/NetworkStatsTest.kt
index e80548b..39f1b69 100644
--- a/tests/benchmark/src/android/net/netstats/benchmarktests/NetworkStatsTest.kt
+++ b/tests/benchmark/src/android/net/netstats/benchmarktests/NetworkStatsTest.kt
@@ -20,10 +20,9 @@
 import android.net.NetworkStatsCollection
 import android.net.netstats.NetworkStatsDataMigrationUtils.PREFIX_UID
 import android.os.DropBoxManager
-import androidx.test.InstrumentationRegistry
+import androidx.test.platform.app.InstrumentationRegistry
 import com.android.internal.util.FileRotator
 import com.android.internal.util.FileRotator.Reader
-import com.android.server.connectivity.benchmarktests.R
 import com.android.server.net.NetworkStatsRecorder
 import java.io.BufferedInputStream
 import java.io.DataInputStream
@@ -48,6 +47,7 @@
         private val UID_COLLECTION_BUCKET_DURATION_MS = TimeUnit.HOURS.toMillis(2)
         private val UID_RECORDER_ROTATE_AGE_MS = TimeUnit.DAYS.toMillis(15)
         private val UID_RECORDER_DELETE_AGE_MS = TimeUnit.DAYS.toMillis(90)
+        private val TEST_NETSTATS_MANY_UIDS_FILE = "netstats-many-uids.zip"
 
         private val testFilesDir by lazy {
             // These file generated by using real user dataset which has many uid records
@@ -55,8 +55,8 @@
             // extracted from rooted devices by using
             // "adb pull /data/misc/apexdata/com.android.tethering/netstats" command.
             val zipInputStream =
-                ZipInputStream(getInputStreamForResource(R.raw.netstats_many_uids_zip))
-            unzipToTempDir(zipInputStream)
+                ZipInputStream(TEST_NETSTATS_MANY_UIDS_FILE.toAssetInputStream())
+            File(unzipToTempDir(zipInputStream), "netstats")
         }
 
         private val uidTestFiles: List<File> by lazy {
@@ -79,17 +79,24 @@
             }
         }
 
-        private fun getInputStreamForResource(resourceId: Int): DataInputStream =
-            DataInputStream(
-                InstrumentationRegistry.getContext()
-                    .getResources().openRawResource(resourceId)
-            )
+        val context get() = InstrumentationRegistry.getInstrumentation().getContext()
+        private fun String.toAssetInputStream() = DataInputStream(context.assets.open(this))
 
         private fun unzipToTempDir(zis: ZipInputStream): File {
             val statsDir =
                 Files.createTempDirectory(NetworkStatsTest::class.simpleName).toFile()
             generateSequence { zis.nextEntry }.forEach { entry ->
-                FileOutputStream(File(statsDir, entry.name)).use {
+                val entryFile = File(statsDir, entry.name)
+                if (entry.isDirectory) {
+                    entryFile.mkdirs()
+                    return@forEach
+                }
+
+                // Make sure all folders exists. There is no guarantee anywhere.
+                entryFile.parentFile!!.mkdirs()
+
+                // If the entry is a file extract it.
+                FileOutputStream(entryFile).use {
                     zis.copyTo(it, DEFAULT_BUFFER_SIZE)
                 }
             }
@@ -99,7 +106,7 @@
         // List [xt|uid|uid_tag].<start>-<end> files under the given directory.
         private fun getSortedListForPrefix(statsDir: File, prefix: String): List<File> {
             assertTrue(statsDir.exists())
-            return statsDir.list() { dir, name -> name.startsWith("$prefix.") }
+            return statsDir.list { _, name -> name.startsWith("$prefix.") }
                 .orEmpty()
                 .map { it -> File(statsDir, it) }
                 .sorted()