Fix tests by ignoring metadata

(we skip applying it because no permissions)

testsuite/datmantests/test_backup_and_extract.py

@@ -1,5 +1,4 @@
 import subprocess
-import time
 from pathlib import Path
 from random import Random
 from tempfile import TemporaryDirectory
@@ -57,4 +56,6 @@ class TestBackupAndExtract(TestCase):
         key, value = next(iter(value.contents.items()))
         self.assertEqual(key, "srca")
 
-        self.assertEqual(value, later_expected_descriptor)
+        self.assertEqual(
+            value.ignore_metadata(), later_expected_descriptor.ignore_metadata()
+        )

testsuite/helpers/__init__.py

@@ -26,6 +26,11 @@ class FileDescriptor:
     owner: int
     group: int
 
+    def ignore_metadata(self) -> "FileDescriptor":
+        return FileDescriptor(
+            sha256_sum=self.sha256_sum, mtime_ms=0, permissions=0, owner=0, group=0
+        )
+
 
 @attr.s(auto_attribs=True, frozen=True)
 class DirectoryDescriptor:
@@ -35,6 +40,15 @@ class DirectoryDescriptor:
     owner: int
     group: int
 
+    def ignore_metadata(self) -> "DirectoryDescriptor":
+        return DirectoryDescriptor(
+            immutabledict({k: v.ignore_metadata() for k, v in self.contents.items()}),
+            mtime_ms=0,
+            permissions=0,
+            owner=0,
+            group=0,
+        )
+
 
 def generate_random_file(rng: Random, path: Path) -> FileDescriptor:
     """