Publish Vulpes Preview 15 sources for desktop, Android and Tundra

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tundra/tests/test_boot_backup.py

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+# SPDX-License-Identifier: MPL-2.0
+import hashlib
+import importlib.util
+import io
+from pathlib import Path
+import unittest
+from unittest.mock import patch
+
+SOURCE = Path(__file__).resolve().parents[1] / 'droidian/backup-boot.py'
+spec = importlib.util.spec_from_file_location('backup_boot', SOURCE)
+backup = importlib.util.module_from_spec(spec)
+spec.loader.exec_module(backup)
+
+
+class BootBackupTests(unittest.TestCase):
+    def test_copy_is_exact_even_with_more_input(self):
+        data = b'sargo boot' * 200000
+        source, destination = io.BytesIO(data + b'next partition'), io.BytesIO()
+        self.assertEqual(backup.copy_exact(source, destination, len(data)),
+                         hashlib.sha256(data).hexdigest())
+        self.assertEqual(destination.getvalue(), data)
+        self.assertEqual(source.read(), b'next partition')
+
+    def test_short_partition_read_is_not_reported_as_success(self):
+        with self.assertRaisesRegex(RuntimeError, 'before its declared size'):
+            backup.copy_exact(io.BytesIO(b'incomplete'), io.BytesIO(), 1024)
+
+    def test_no_privilege_means_no_output_or_device_access(self):
+        with patch.object(backup.os, 'geteuid', return_value=32011), \
+             patch.object(backup.tempfile, 'mkdtemp') as mkdir, \
+             patch.object(backup.os, 'open') as open_device:
+            with self.assertRaisesRegex(RuntimeError, 'require sudo'):
+                backup.main()
+            mkdir.assert_not_called()
+            open_device.assert_not_called()
+
+    def test_other_device_is_rejected_before_output(self):
+        with patch.object(backup.os, 'geteuid', return_value=0), \
+             patch.object(backup.pwd, 'getpwnam'), \
+             patch.object(backup.Path, 'exists', return_value=True), \
+             patch.object(backup.Path, 'read_bytes', return_value=b'google,bonito\0'), \
+             patch.object(backup.subprocess, 'check_output', return_value='bonito\n'), \
+             patch.object(backup.tempfile, 'mkdtemp') as mkdir:
+            with self.assertRaisesRegex(RuntimeError, 'inventoried Sargo'):
+                backup.main()
+            mkdir.assert_not_called()