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/users/user_calendars_tests.erl

@@ -13,11 +13,10 @@ test() ->
   ct:pal("=== User Calendars Tests ==="),
   Token = api_test_runner:get_user_token(),
 
-  % Создаём один календарь для тестов
-  #{<<"id">> := CalId} = api_test_runner:client_post(<<"/v1/calendars">>, Token,
-    #{title => <<"TestCal">>, type => <<"personal">>}),
+  _CalId = api_test_runner:create_calendar(Token, #{title => <<"TestCal">>}),
 
   test_create_calendar(Token),
+  test_second_personal_rejected(Token),
   test_list_calendars(Token),
   test_list_calendars_unauthorized(),
 
@@ -25,15 +24,23 @@ test() ->
   ok.
 
 test_create_calendar(Token) ->
-  ct:pal("  TEST: Create a new calendar"),
+  ct:pal("  TEST: Create a new studio calendar"),
+  api_test_runner:ensure_commercial_subscription(Token),
   Resp = api_test_runner:client_request(post, <<"/v1/calendars">>, Token,
-    jsx:encode(#{title => <<"NewCal">>, type => <<"personal">>})),
+    jsx:encode(#{title => <<"NewCal">>, type => <<"commercial">>})),
   {ok, 201, _, Body} = Resp,
   #{<<"id">> := Id, <<"title">> := Title} = jsx:decode(list_to_binary(Body), [return_maps]),
   ?assert(is_binary(Id)),
   ?assertEqual(<<"NewCal">>, Title),
   ct:pal("    OK: created calendar ~s", [Id]).
 
+test_second_personal_rejected(Token) ->
+  ct:pal("  TEST: Second personal calendar rejected (409)"),
+  Resp = api_test_runner:client_request(post, <<"/v1/calendars">>, Token,
+    jsx:encode(#{title => <<"AnotherPersonal">>, type => <<"personal">>})),
+  ?assertMatch({ok, 409, _, _}, Resp),
+  ct:pal("    OK: got 409 personal_exists").
+
 test_list_calendars(Token) ->
   ct:pal("  TEST: List user calendars"),
   Calendars = api_test_runner:client_get(<<"/v1/calendars">>, Token),