fix(ct): adapt API tests to sole Default personal

Default create_calendar to commercial; reuse existing personal on 409;
assert verify title Default; cover personal_exists / default_calendar.

Refs EventHub/EventHubBack#64

test/api/admins/admin_calendars_tests.erl

@@ -67,21 +67,16 @@ setup() ->
   Email = api_test_runner:unique_email(<<"caladmin">>),
   Password = <<"testpass">>,
   UserToken = api_test_runner:register_and_login(Email, Password),
-  CalId1 = create_calendar(UserToken, <<"Personal Active">>, <<"Desc1">>),
-  CalId2 = create_calendar(UserToken, <<"Commercial">>, <<"Desc2">>),
-  CalId3 = create_calendar(UserToken, <<"Frozen">>, <<"Desc3">>),
-  update_calendar_admin(AdminToken, CalId2, #{<<"type">> => <<"commercial">>}),
+  %% Sole personal Default already exists after verify
+  CalId1 = api_test_runner:existing_personal_calendar_id(UserToken),
+  CalId2 = api_test_runner:create_calendar(UserToken,
+    #{title => <<"Commercial">>, description => <<"Desc2">>, type => <<"commercial">>}),
+  CalId3 = api_test_runner:create_calendar(UserToken,
+    #{title => <<"Frozen">>, description => <<"Desc3">>, type => <<"commercial">>}),
   update_calendar_admin(AdminToken, CalId3, #{<<"status">> => <<"frozen">>}),
   ct:pal(" Created calendars: ~p", [[CalId1, CalId2, CalId3]]),
   {AdminToken, UserToken, [CalId1, CalId2, CalId3]}.
 
--spec create_calendar(binary(), binary(), binary()) -> binary().
-create_calendar(UserToken, Title, Description) ->
-  Body = jsx:encode(#{title => Title, description => Description}),
-  {ok, 201, _, Resp} = api_test_runner:client_request(post, <<"/v1/calendars">>, UserToken, Body),
-  #{<<"id">> := Id} = jsx:decode(list_to_binary(Resp), [return_maps]),
-  Id.
-
 -spec update_calendar_admin(binary(), binary(), map()) -> ok.
 update_calendar_admin(AdminToken, CalId, Updates) ->
   {ok, 200, _, RespBody} = api_test_runner:admin_request(get, <<"/v1/admin/calendars/", CalId/binary>>, AdminToken, <<"">>),