From eb6162f2b9ffbde0ec5539462f0a58d72c065c7a Mon Sep 17 00:00:00 2001
From: Neal Gafter <neal@gafter.com>
Date: Wed, 13 Nov 2024 14:35:38 -0800
Subject: [PATCH] Test the behavior of NaN in a where clause. (#115)

---
 test/matchtests.jl | 28 ++++++++++++++++++++++++++++
 1 file changed, 28 insertions(+)

diff --git a/test/matchtests.jl b/test/matchtests.jl
index 29563ed..bc6c9ef 100644
--- a/test/matchtests.jl
+++ b/test/matchtests.jl
@@ -445,4 +445,32 @@ end
     end
 end
 
+@testset "Test the behavior of NaN values" begin
+    v = 0.0 / 0.0
+    @test @match v begin
+        x where x > 0 => false
+        x where x <= 0 => false
+        _ => true
+    end
+    @test @match v begin
+        x where x < 0 => false
+        x where x >= 0 => false
+        _ => true
+    end
+    @test @match v begin
+        x where x >= 0 => false
+        x where x < 0 => false
+        _ => true
+    end
+    @test @match v begin
+        x where x <= 0 => false
+        x where x > 0 => false
+        _ => true
+    end
+    @test @match v begin
+        x where x == 0 => false
+        x where x != 0 => true
+    end
+end
+
 end