From aefbb723553a67cdd223594dae0dc4f666defb40 Mon Sep 17 00:00:00 2001
From: Kai Schlamp <kai.schlamp@gmail.com>
Date: Tue, 15 Oct 2024 19:20:35 +0000
Subject: [PATCH] Use set_original_encoding

---
 pynetdicom/dsutils.py          |  5 +++--
 pynetdicom/events.py           |  2 ++
 pynetdicom/tests/test_assoc.py | 21 ++++++---------------
 3 files changed, 11 insertions(+), 17 deletions(-)

diff --git a/pynetdicom/dsutils.py b/pynetdicom/dsutils.py
index e19b03256..6b630b87b 100644
--- a/pynetdicom/dsutils.py
+++ b/pynetdicom/dsutils.py
@@ -61,6 +61,9 @@ def create_file_meta(
     file_meta.ImplementationClassUID = implementation_uid
     file_meta.ImplementationVersionName = implementation_version
 
+    # File Meta Information is always encoded as Explicit VR Little Endian
+    file_meta.set_original_encoding(False, True)
+
     return file_meta
 
 
@@ -264,8 +267,6 @@ def pretty_element(elem: DataElement) -> str:
                 value = "\\".join([str(ii) for ii in elem.value])
                 value = f"[{value}]"
         elif elem.VR == "SQ":
-            # Sequence elements always have a VM of 1
-            assert elem.VM == 1
             length = len(elem.value)
             if length == 1:
                 value = f"(Sequence with {length} item)"
diff --git a/pynetdicom/events.py b/pynetdicom/events.py
index 4832c7a95..2cc26af63 100644
--- a/pynetdicom/events.py
+++ b/pynetdicom/events.py
@@ -868,6 +868,8 @@ def _get_dataset(self, attr: str, exc_msg: str) -> Dataset:
                     t_syntax.is_deflated,
                 )
 
+                ds.set_original_encoding(t_syntax.is_implicit_VR, t_syntax.is_little_endian)
+
                 # Store the decoded dataset in case its accessed again
                 self._decoded = ds
             else:
diff --git a/pynetdicom/tests/test_assoc.py b/pynetdicom/tests/test_assoc.py
index acd8e78c3..b9c797e6f 100644
--- a/pynetdicom/tests/test_assoc.py
+++ b/pynetdicom/tests/test_assoc.py
@@ -1879,23 +1879,16 @@ def handle_store(event):
         assoc = ae.associate("localhost", 11112)
         assert assoc.is_established
 
-        ds = Dataset()
-        ds.SOPClassUID = CTImageStorage
-        ds.SOPInstanceUID = generate_uid()
-        file_meta = FileMetaDataset()
-        file_meta.TransferSyntaxUID = ExplicitVRLittleEndian
-        ds.file_meta = file_meta
+        ds = dcmread(DATASET_PATH)
+        assert ds.original_encoding == (False, True)
+        assert ds.file_meta.TransferSyntaxUID == ExplicitVRLittleEndian
 
         with caplog.at_level(logging.WARNING, logger="pynetdicom"):
-            with pytest.warns(DeprecationWarning):
-                ds.is_implicit_VR = True
-                ds.is_little_endian = True
+            ds.set_original_encoding(True, True)
             status = assoc.send_c_store(ds)
             assert status.Status == 0x0000
 
-            with pytest.warns(DeprecationWarning):
-                ds.is_implicit_VR = False
-                ds.is_little_endian = False
+            ds.set_original_encoding(False, False)
             status = assoc.send_c_store(ds)
             assert status.Status == 0x0000
 
@@ -1910,9 +1903,7 @@ def handle_store(event):
             "Little Endian' - using 'Explicit VR Big Endian' instead"
         ) in caplog.text
 
-        with pytest.warns(DeprecationWarning):
-            ds.is_implicit_VR = False
-            ds.is_little_endian = True
+        ds.set_original_encoding(False, True)
         ds.file_meta.TransferSyntaxUID = ImplicitVRLittleEndian
         msg = (
             "'dataset' is encoded as explicit VR little endian but the file "