add router response schema validation

README.md

@@ -118,9 +118,11 @@ The following resources can be requested from the webservice.
 
 ### synchronous resources
 
+All responses are JSON formatted messages.
+
 * `/data/version`
 
-  The response will be a JSON message formatted object
+  The response will be an object
   containing the module and protocol versions of the
   running server and will be formatted as follows:
 
@@ -143,3 +145,16 @@ The following resources can be requested from the webservice.
     }
   ```
 
+* /data/routers
+
+  The response will be a list of router hostnames
+  for which information is available and will be
+  formatted as follows:
+
+  ```json
+  {
+      "$schema": "http://json-schema.org/draft-07/schema#",
+      "type": "array",
+      "items": {"type": "string"}
+  }
+  ```

test/test_data_routes.py

@@ -187,7 +187,14 @@ class MockedRedis(object):
         return MockedRedis.db.keys()
 
 
-def test_abc(mocker, client):
+def test_routers_list(mocker, client):
+
+    routers_list_schema = {
+        "$schema": "http://json-schema.org/draft-07/schema#",
+        "type": "array",
+        "items": {"type": "string"}
+    }
+
     mocker.patch(
         'inventory_provider.router_details.redis.StrictRedis',
         MockedRedis)
@@ -199,5 +206,6 @@ def test_abc(mocker, client):
         headers=DEFAULT_REQUEST_HEADERS)
     assert rv.status_code == 200
 
-    rsp = rv.data.decode("utf-8")
-    print(rsp)
+    response = json.loads(rv.data.decode("utf-8"))
+    jsonschema.validate(response, routers_list_schema)
+    assert response  # shouldn't be empty