add tests of /data/* routes

test/test_general_data_routes.py

+import json
+import jsonschema
+
+DEFAULT_REQUEST_HEADERS = {
+    "Content-type": "application/json",
+    "Accept": ["application/json"]
+}
+
+
+def test_get_routers(client):
+    version_schema = {
+        "$schema": "http://json-schema.org/draft-07/schema#",
+        "type": "array",
+        "items": {"type": "string"}
+    }
+
+    rv = client.post(
+        "data/routers",
+        headers=DEFAULT_REQUEST_HEADERS)
+    assert rv.status_code == 200
+    response = json.loads(rv.data.decode("utf-8"))
+    jsonschema.validate(response, version_schema)
+    assert response