Publish Vulpes Preview 15 sources for desktop, Android and Tundra

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tundra/tests/test_usb.py

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+# SPDX-License-Identifier: MPL-2.0
+import gzip
+import json
+from pathlib import Path
+import struct
+import subprocess
+import sys
+import tempfile
+import unittest
+sys.path.insert(0,str(Path(__file__).resolve().parents[1]/'tools'))
+from tundra import ROOT, checked_source, digest
+
+class USBPackagingTests(unittest.TestCase):
+    def test_refuses_host_execution(self):
+        init=ROOT/'out/usb-diagnostic/x86_64/init'
+        if not init.exists(): self.skipTest('Build USB diagnostic first')
+        result=subprocess.run([str(init)],capture_output=True,text=True,timeout=5)
+        self.assertEqual(result.returncode,2)
+        self.assertIn('must be PID 1',result.stdout)
+
+    def test_sargo_usb_independent_unpack(self):
+        folder=ROOT/'out/usb-diagnostic'
+        if not (folder/'build.json').exists():self.skipTest('Build USB diagnostic first')
+        report=json.loads((folder/'build.json').read_text())
+        image=folder/report['file']
+        self.assertFalse(report['flashReady'])
+        self.assertEqual(digest(image),report['imageSha256'])
+        with tempfile.TemporaryDirectory() as tmp:
+            result=subprocess.run([sys.executable,str(checked_source('aosp-mkbootimg')/'unpack_bootimg.py'),'--boot_img',str(image),'--out',tmp],check=True,capture_output=True,text=True)
+            self.assertIn('tundra.usb=1',result.stdout)
+            ramdisk=(Path(tmp)/'ramdisk').read_bytes()
+            self.assertEqual(ramdisk,(folder/'aarch64/initramfs.cpio.gz').read_bytes())
+            elf=subprocess.run(['cpio','-i','--to-stdout','init'],input=gzip.decompress(ramdisk),capture_output=True,check=True).stdout
+            self.assertEqual(elf[:4],b'\x7fELF')
+            self.assertEqual(struct.unpack_from('<H',elf,18)[0],183)
+            self.assertEqual(elf,(folder/'aarch64/init').read_bytes())