Nomad changes

fixtures/detection/get_extensions_unknown_mime.json

@@ -0,0 +1,11 @@
+{
+  "id": "get_extensions_unknown_mime",
+  "category": "detection",
+  "description": "get_extensions unknown MIME",
+  "tags": ["mime_detection", "error"],
+  "call": "get_extensions_for_mime",
+  "input": {
+    "mime_type": "application/x-totally-unknown"
+  },
+  "assertions": [{ "type": "error" }]
+}