From 2e67a047141e5e00c583a7405bdeca2fb6f34ee2 Mon Sep 17 00:00:00 2001
From: Vedant Puri <vedantpuri@gmail.com>
Date: Thu, 13 Jan 2022 15:32:53 +0530
Subject: [PATCH] tests

---
 test/basictests.jl | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/test/basictests.jl b/test/basictests.jl
index 9741755a4..a9ced32fa 100644
--- a/test/basictests.jl
+++ b/test/basictests.jl
@@ -224,6 +224,9 @@ end
         P1 = Diagonal(s1)
         P2 = Diagonal(s2)
 
+        @test LinearSolve.ComposePreconditioner(P1,nothing) === P1
+        @test LinearSolve.ComposePreconditioner(nothing,P1) === P1
+
         P  = LinearSolve.ComposePreconditioner(P1,P2)
 
         # ComposePreconditioner