Zstd: Don't persist the checksum param if false

numcodecs/tests/test_zstd.py

@@ -90,3 +90,10 @@ def test_native_functions():
     assert Zstd.default_level() == 3
     assert Zstd.min_level() == -131072
     assert Zstd.max_level() == 22
+
+
+def test_zstd_config():
+    # Testing that checksum is removed from config if False
+    codec = Zstd(level=5, checksum=False)
+    config = codec.get_config()
+    assert config == {"id": "zstd", "level": 5}

numcodecs/zstd.pyx

@@ -258,6 +258,13 @@ class Zstd(Codec):
              self.level)
         return r
 
+    # Override to remove "checksum" if False
+    def get_config(self):
+        config = {'id': self.codec_id, 'level': self.level}
+        if self.checksum:
+            config['checksum'] = True
+        return config
+
     @classmethod
     def default_level(cls):
         """Returns the default compression level of the underlying zstd library."""