--- a/spec/util_smqueue_spec.lua	Wed Oct 19 14:21:13 2022 +0200
+++ b/spec/util_smqueue_spec.lua	Wed Oct 19 14:34:41 2022 +0200
@@ -5,6 +5,9 @@
 
 	describe("#new()", function()
 		it("should work", function()
+			assert.has_error(function () smqueue.new(-1) end);
+			assert.has_error(function () smqueue.new(0) end);
+			assert.not_has_error(function () smqueue.new(1) end);
 			local q = smqueue.new(10);
 			assert.truthy(q);
 		end)