From dae5ea5d0ba5b1b2f57ea9e62092534861ca7505 Mon Sep 17 00:00:00 2001
From: Josh Day <emailjoshday@gmail.com>
Date: Tue, 21 May 2024 10:39:59 -0400
Subject: [PATCH] tests for merge

---
 test/runtests.jl | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/test/runtests.jl b/test/runtests.jl
index 612245e..94a6f8e 100644
--- a/test/runtests.jl
+++ b/test/runtests.jl
@@ -27,6 +27,8 @@ O = OnlineStatsBase
     @test is_mergeable(Mean()) == true
     @test is_mergeable(CircBuff(Int, 5)) == false
 
+    @test_throws Exception merge!(fit!(CircBuff(Int,5), 1), fit!(CircBuff(Int,5), 2))
+
     @testset "name" begin
         name = OnlineStatsBase.name
         o = Mean()