Added basic NS tests

.gitlab-ci.yml

 stages:
+  - test
   - review
   - build
 
+variables:
+  PIP_CACHE_DIR: "$CI_PROJECT_DIR/pip-cache"
+
+test_jsonld_ns:
+  stage: test
+  image: python:3
+  interruptible: true
+  cache:
+    key: "$CI_PROJECT_ID__pip_cache"
+    paths:
+      - "$PIP_CACHE_DIR"
+
+  before_script:
+    - pip install pyld pytest requests requests_mock
+  script:
+    - pytest test_ns.py
+
 review:
   stage: review
   image: buildkite/puppeteer
+  interruptible: true
   variables:
     GIT_STRATEGY: clone
     VUE_APP_ROUTER_BASE_URL: /-/$CI_PROJECT_NAME/-/jobs/$CI_JOB_ID/artifacts/review/

public/ns

@@ -55,6 +55,6 @@
       "@id": "fw:license",
       "@type": "@id"
     },
-    "copyright": "fw:copyright",
+    "copyright": "fw:copyright"
   }
 }

test_ns.py

+import pyld
+import json
+import os
+import requests_mock
+
+PATH = os.path.join(os.path.dirname(os.path.abspath(__file__)), "public", "ns")
+
+
+def test_ns_is_valid_json():
+    with open(PATH) as f:
+        content = f.read()
+
+    json.loads(content)
+
+
+def test_fw_activity_using_schema():
+    with open(PATH) as f:
+        schema = f.read()
+
+    jsonld_payload = """
+    {
+        "type": "Album",
+        "id": "https://channels.tests.funkwhale.audio/federation/music/albums/56439007-9f14-4f39-adbf-2108a6d2f494",
+        "name": "Hobbykoch Podcast",
+        "published": "2020-02-19T08:00:53.525566+00:00",
+        "musicbrainzId": null,
+        "released": "2020-01-01",
+        "artists": [
+            {
+                "type": "Artist",
+                "id": "https://channels.tests.funkwhale.audio/federation/music/artists/bc187046-ab46-4e16-a41f-770e663dc285",
+                "name": "Kai Daniel Du",
+                "published": "2020-02-19T08:00:53.521010+00:00",
+                "musicbrainzId": null,
+                "attributedTo": "https://channels.tests.funkwhale.audio/federation/actors/Testacc242",
+                "tag": [
+                    {
+                    "type": "Hashtag",
+                    "name": "#Podcast"
+                    }
+                ],
+                "image": null
+            }
+        ],
+        "attributedTo": "https://channels.tests.funkwhale.audio/federation/actors/Testacc242",
+        "tag": [
+            {
+            "type": "Hashtag",
+            "name": "#Podcast"
+            }
+        ],
+        "cover": {
+            "type": "Link",
+            "href": "https://channels.tests.funkwhale.audio/media/attachments/d7/e1/84/attachment_cover-56439007-9f14-4f39-adbf-2108a6d2f494.jpg",
+            "mediaType": "image/jpeg"
+        },
+        "image": {
+            "type": "Image",
+            "url": "https://channels.tests.funkwhale.audio/media/attachments/d7/e1/84/attachment_cover-56439007-9f14-4f39-adbf-2108a6d2f494.jpg",
+            "mediaType": "image/jpeg"
+        },
+        "@context": [
+            "https://www.w3.org/ns/activitystreams",
+            "https://w3id.org/security/v1",
+            "https://funkwhale.audio/ns",
+            {
+            "manuallyApprovesFollowers": "as:manuallyApprovesFollowers",
+            "Hashtag": "as:Hashtag"
+            }
+        ]
+    }
+    """
+    parsed = json.loads(jsonld_payload)
+    with requests_mock.Mocker(real_http=True) as m:
+        m.get("https://funkwhale.audio/ns", text=schema)
+        expanded = pyld.jsonld.expand(parsed)
+
+    serialized = json.dumps(expanded, indent=2)
+    assert "_:" not in serialized