feat: Add current extension codes

Author: effigies

nibabel/nifti1.py

@@ -652,6 +652,21 @@ def _mangle(self, dataset: DicomDataset) -> bytes:
         (12, 'workflow_fwds', Nifti1Extension),
         (14, 'freesurfer', Nifti1Extension),
         (16, 'pypickle', Nifti1Extension),
+        (18, 'mind_ident', NiftiExtension),
+        (20, 'b_value', NiftiExtension),
+        (22, 'spherical_direction', NiftiExtension),
+        (24, 'dt_component', NiftiExtension),
+        (26, 'shc_degreeorder', NiftiExtension),
+        (28, 'voxbo', NiftiExtension),
+        (30, 'caret', NiftiExtension),
+        ## Defined in nibabel.cifti2.parse_cifti2
+        # (32, 'cifti', Cifti2Extension),
+        (34, 'variable_frame_timing', NiftiExtension),
+        (36, 'unassigned', NiftiExtension),
+        (38, 'eval', NiftiExtension),
+        (40, 'matlab', NiftiExtension),
+        (42, 'quantiphyse', NiftiExtension),
+        (44, 'mrs', NiftiExtension[ty.Dict[str, ty.Any]]),
     ),
     fields=('code', 'label', 'handler'),
 )

nibabel/tests/test_nifti1.py

@@ -30,7 +30,6 @@
     Nifti1Image,
     Nifti1Pair,
     Nifti1PairHeader,
-    NiftiJSONExtension,
     data_type_codes,
     extension_codes,
     load,
@@ -1415,56 +1414,6 @@ def test_nifti_dicom_extension():
         Nifti1DicomExtension(2, 0)
 
 
-def test_json_extension(tmp_path):
-    nim = load(image_file)
-    hdr = nim.header
-    exts_container = hdr.extensions
-
-    # Test basic functionality
-    json_ext = NiftiJSONExtension('ignore', b'{"key": "value"}')
-    assert json_ext.get_content() == {'key': 'value'}
-    byte_content = json_ext._mangle(json_ext.get_content())
-    assert byte_content == b'{"key": "value"}'
-    json_obj = json_ext._unmangle(byte_content)
-    assert json_obj == {'key': 'value'}
-    size = 16 * ((len(byte_content) + 7) // 16 + 1)
-    assert json_ext.get_sizeondisk() == size
-
-    def ext_to_bytes(ext, byteswap=False):
-        bio = BytesIO()
-        ext.write_to(bio, byteswap)
-        return bio.getvalue()
-
-    # Check serialization
-    bytestring = ext_to_bytes(json_ext)
-    assert bytestring[:8] == struct.pack('<2I', size, extension_codes['ignore'])
-    assert bytestring[8:].startswith(byte_content)
-    assert len(bytestring) == size
-
-    # Save to file and read back
-    exts_container.append(json_ext)
-    nim.to_filename(tmp_path / 'test.nii')
-
-    # We used ignore, so it comes back as a Nifti1Extension
-    rt_img = Nifti1Image.from_filename(tmp_path / 'test.nii')
-    assert len(rt_img.header.extensions) == 3
-    rt_ext = rt_img.header.extensions[-1]
-    assert rt_ext.get_code() == extension_codes['ignore']
-    assert rt_ext.get_content() == byte_content
-
-    # MRS is currently the only JSON extension
-    json_ext._code = extension_codes['mrs']
-    nim.to_filename(tmp_path / 'test.nii')
-
-    # Check that the extension is read back as a NiftiJSONExtension
-    rt_img = Nifti1Image.from_filename(tmp_path / 'test.nii')
-    assert len(rt_img.header.extensions) == 3
-    rt_ext = rt_img.header.extensions[-1]
-    assert rt_ext.get_code() == extension_codes['mrs']
-    assert isinstance(rt_ext, NiftiJSONExtension)
-    assert rt_ext.get_content() == json_obj
-
-
 class TestNifti1General:
     """Test class to test nifti1 in general