fix(test): new keyspace not found behavior

integrates the new behavior for when the keyspace is not found in tests:
raise instead of returning an `{:error, _}` tuple.

Signed-off-by: Luca Zaninotto <luca.zaninotto@secomind.com>

Author: lusergit

apps/astarte_realm_management/test/astarte_realm_management/engine_test.exs

@@ -1569,8 +1569,9 @@ defmodule Astarte.RealmManagement.EngineTest do
   test "fail to retrieve datastream_maximum_storage_retention if realm does not exist" do
     realm_name = "realm#{System.unique_integer([:positive])}"
 
-    assert {:error, _} =
-             Engine.get_datastream_maximum_storage_retention(realm_name)
+    assert_raise Xandra.Error, fn ->
+      Engine.get_datastream_maximum_storage_retention(realm_name)
+    end
   end
 
   defp unpack_source({:ok, source}) when is_binary(source) do

apps/astarte_realm_management/test/astarte_realm_management/queries_test.exs

@@ -875,7 +875,8 @@ defmodule Astarte.RealmManagement.QueriesTest do
   test "fail to retrieve datastream_maximum_storage_retention if realm does not exist" do
     realm_name = "realm#{System.unique_integer([:positive])}"
 
-    assert {:error, _} =
-             Queries.get_datastream_maximum_storage_retention(realm_name)
+    assert_raise Xandra.Error, fn ->
+      Queries.get_datastream_maximum_storage_retention(realm_name)
+    end
   end
 end