admin_api.guilds: make get guild route raise GuildNotFound

before it was returning 200 but with a `null` inside, I don't think
that's reasonable API design.

 - test_admin_api/test_guilds: add checks for GuildNotFound error code

docs/admin_api.md

@@ -150,7 +150,7 @@ Returns empty body with 204 status code on success.
 
 ### GET `/guilds/<guild_id>`
 
-Returns a partial guild object.
+Returns a partial guild object. Gives a 404 when the guild is not found.
 
 ### PATCH `/guilds/<guild_id>`
 

litecord/blueprints/admin_api/guilds.py

@@ -23,6 +23,7 @@ from litecord.auth import admin_check
 from litecord.schemas import validate
 from litecord.admin_schemas import GUILD_UPDATE
 from litecord.blueprints.guilds import delete_guild
+from litecord.errors import GuildNotFound
 
 bp = Blueprint('guilds_admin', __name__)
 
@@ -31,9 +32,12 @@ async def get_guild(guild_id: int):
     """Get a basic guild payload."""
     await admin_check()
 
-    return jsonify(
-        await app.storage.get_guild(guild_id)
-    )
+    guild = await app.storage.get_guild(guild_id)
+
+    if not guild:
+        raise GuildNotFound()
+
+    return jsonify(guild)
 
 
 @bp.route('/<int:guild_id>', methods=['PATCH'])

tests/test_admin_api/test_guilds.py

@@ -23,6 +23,7 @@ import pytest
 
 from tests.common import login
 from litecord.blueprints.guilds import delete_guild
+from litecord.errors import GuildNotFound
 
 async def _create_guild(test_cli, *, token=None):
     token = token or await login('admin', test_cli)
@@ -125,5 +126,9 @@ async def test_guild_delete(test_cli):
                                   ret_early=True)
 
         assert resp.status_code == 404
+        rjson = await resp.json
+        assert isinstance(rjson, dict)
+        assert rjson['error']
+        assert rjson['code'] == GuildNotFound.error_code
     finally:
         await delete_guild(int(guild_id), app_=test_cli.app)