add a test case to validate deepcopy on PartitionBuildProps

Test: atest --host releasetools_test
Bug: 253549364
Change-Id: I187554ae33041ed090ee352167ef8deb51d754bc

tools/releasetools/test_common.py

@@ -2186,3 +2186,29 @@ class PartitionBuildPropsTest(test_utils.ReleaseToolsTestCase):
       }
       self.assertRaises(ValueError, common.PartitionBuildProps.FromInputFile,
                         input_zip, 'odm', placeholder_values)
+
+  def test_partitionBuildProps_fromInputFile_deepcopy(self):
+    build_prop = [
+        'ro.odm.build.date.utc=1578430045',
+        'ro.odm.build.fingerprint='
+        'google/coral/coral:10/RP1A.200325.001/6337676:user/dev-keys',
+        'ro.product.odm.device=coral',
+    ]
+    input_file = self._BuildZipFile({
+        'ODM/etc/build.prop': '\n'.join(build_prop),
+    })
+
+    with zipfile.ZipFile(input_file, 'r', allowZip64=True) as input_zip:
+      placeholder_values = {
+          'ro.boot.product.device_name': ['std', 'pro']
+      }
+      partition_props = common.PartitionBuildProps.FromInputFile(
+          input_zip, 'odm', placeholder_values)
+
+    copied_props = copy.deepcopy(partition_props)
+    self.assertEqual({
+      'ro.odm.build.date.utc': '1578430045',
+      'ro.odm.build.fingerprint':
+      'google/coral/coral:10/RP1A.200325.001/6337676:user/dev-keys',
+      'ro.product.odm.device': 'coral',
+    }, copied_props.build_props)