Adds regression test_issue1622

spacy/tests/regression/test_issue1622.py

@@ -0,0 +1,89 @@
+# coding: utf-8
+from __future__ import unicode_literals
+import json
+from tempfile import TemporaryDirectory, NamedTemporaryFile
+
+from ...cli.train import train
+
+
+def test_cli_trained_model_can_be_saved():
+    cmd = None
+    lang = 'nl'
+    with TemporaryDirectory() as output_dir:
+        train_file = NamedTemporaryFile('wb', dir=output_dir, delete=False)
+        train_corpus = [
+            {
+                "id": "identifier_0",
+                "paragraphs": [
+                    {
+                        "raw": "Jan houdt van Marie.\n",
+                        "sentences": [
+                            {
+                                "tokens": [
+                                    {
+                                        "id": 0,
+                                        "dep": "nsubj",
+                                        "head": 1,
+                                        "tag": "NOUN",
+                                        "orth": "Jan",
+                                        "ner": "B-PER"
+                                    },
+                                    {
+                                        "id": 1,
+                                        "dep": "ROOT",
+                                        "head": 0,
+                                        "tag": "VERB",
+                                        "orth": "houdt",
+                                        "ner": "O"
+                                    },
+                                    {
+                                        "id": 2,
+                                        "dep": "case",
+                                        "head": 1,
+                                        "tag": "ADP",
+                                        "orth": "van",
+                                        "ner": "O"
+                                    },
+                                    {
+                                        "id": 3,
+                                        "dep": "obj",
+                                        "head": -2,
+                                        "tag": "NOUN",
+                                        "orth": "Marie",
+                                        "ner": "B-PER"
+                                    },
+                                    {
+                                        "id": 4,
+                                        "dep": "punct",
+                                        "head": -3,
+                                        "tag": "PUNCT",
+                                        "orth": ".",
+                                        "ner": "O"
+                                    },
+                                    {
+                                        "id": 5,
+                                        "dep": "",
+                                        "head": -1,
+                                        "tag": "SPACE",
+                                        "orth": "\n",
+                                        "ner": "O"
+                                    }
+                                ],
+                                "brackets": []
+                            }
+                        ]
+                    }
+                ]
+            }
+        ]
+
+        train_file.write(json.dumps(train_corpus).encode('utf-8'))
+        train_file.close()
+        train_data = train_file.name
+        dev_data = train_data
+
+        # spacy train -n 1 -g -1 nl output_nl training_corpus.json training \
+        # corpus.json
+        train(cmd, lang, output_dir, train_data, dev_data, n_iter=1)
+
+        assert True