Add tests for serializing parser

spacy/tests/serialize/test_serialize_parser.py

@@ -0,0 +1,29 @@
+# coding: utf-8
+from __future__ import unicode_literals
+
+from ..util import make_tempdir
+from ...pipeline import NeuralDependencyParser as Parser
+
+import pytest
+
+
+def test_serialize_parser_roundtrip_bytes(en_vocab):
+    parser = Parser(en_vocab)
+    parser.model, _ = parser.Model(0)
+    parser_b = parser.to_bytes()
+    new_parser = Parser(en_vocab)
+    new_parser.model, _ = new_parser.Model(0)
+    new_parser = new_parser.from_bytes(parser_b)
+    assert new_parser.to_bytes() == parser_b
+
+
+def test_serialize_parser_roundtrip_disk(en_vocab):
+    parser = Parser(en_vocab)
+    parser.model, _ = parser.Model(0)
+    with make_tempdir() as d:
+        file_path = d / 'parser'
+        parser.to_disk(file_path)
+        parser_d = Parser(en_vocab)
+        parser_d.model, _ = parser_d.Model(0)
+        parser_d = parser_d.from_disk(file_path)
+        assert parser.to_bytes() == parser_d.to_bytes()