Validate that global core:version is present. (#55)

Do not overwrite version info when reading files.

Author: anarkiwi

sigmf/sigmffile.py

@@ -174,6 +174,7 @@ def __init__(self, metadata=None, data_file=None, global_info=None, skip_checksu
         if metadata is None:
             self._metadata = {self.GLOBAL_KEY:{}, self.CAPTURE_KEY:[], self.ANNOTATION_KEY:[]}
             self._metadata[self.GLOBAL_KEY][self.NUM_CHANNELS_KEY] = 1
+            self._metadata[self.GLOBAL_KEY][self.VERSION_KEY] = "1.0.0"
         elif isinstance(metadata, dict):
             self._metadata = metadata
         else:
@@ -183,8 +184,6 @@ def __init__(self, metadata=None, data_file=None, global_info=None, skip_checksu
         if data_file is not None:
             self.set_data_file(data_file, skip_checksum=skip_checksum, map_readonly=map_readonly)
 
-        self._metadata[self.GLOBAL_KEY][self.VERSION_KEY] = '1.0.0'
-
     def __len__(self):
         return self._memmap.shape[0]
 
@@ -724,8 +723,6 @@ def __init__(self, metafiles=None, metadata=None, skip_checksums=False):
         if not self.skip_checksums:
             self.verify_stream_hashes()
 
-        self._metadata[self.COLLECTION_KEY][self.VERSION_KEY] = '1.0.0'
-
     def __len__(self):
         '''
         the length of a collection is the number of streams

tests/conftest.py

@@ -40,6 +40,7 @@ def test_sigmffile(test_data_file):
     """If pytest uses this signature, will return valid SigMF file."""
     sigf = SigMFFile()
     sigf.set_global_field("core:datatype", "rf32_le")
+    sigf.set_global_field("core:version", "1.0.0")
     sigf.add_annotation(start_index=0, length=len(TEST_FLOAT32_DATA))
     sigf.add_capture(start_index=0)
     sigf.set_data_file(test_data_file.name)

tests/test_archivereader.py

@@ -42,6 +42,7 @@ def test_access_data_without_untar(self):
                         global_info={
                             SigMFFile.DATATYPE_KEY: f"{complex_prefix}{key}_le",
                             SigMFFile.NUM_CHANNELS_KEY: num_channels,
+                            SigMFFile.VERSION_KEY: "1.0.0",
                         },
                     )
                     temp_meta.tofile(temp_archive, toarchive=True)

tests/test_validation.py

@@ -39,6 +39,12 @@ class FailingCases(unittest.TestCase):
     def setUp(self):
         self.metadata = dict(TEST_METADATA)
 
+    def test_no_version(self):
+        '''core:version must be present'''
+        del self.metadata[SigMFFile.GLOBAL_KEY][SigMFFile.VERSION_KEY]
+        with self.assertRaises(ValidationError):
+            SigMFFile(self.metadata).validate()
+
     def test_extra_top_level_key(self):
         '''no extra keys allowed on the top level'''
         self.metadata['extra'] = 0