test xlogy with negative x

JuliaStats · May 19, 2020 · e1bd32f · e1bd32f
1 parent 3638892
commit e1bd32f
Showing 1 changed file with 2 additions and 0 deletions.
diff --git a/test/basicfuns.jl b/test/basicfuns.jl
@@ -8,6 +8,8 @@ using StatsFuns, Test
     @test iszero(xlogy(0, 1))
     @test xlogy(2, 3) ≈ 2.0 * log(3.0)
     @test_throws DomainError xlogy(1, -1)
+    # we allow negative `x` (https://github.com/JuliaStats/StatsFuns.jl/pull/95#discussion_r427558736)
+    @test xlogy(-2, 3) == -xlogy(2, 3)
 end
 
 @testset "logistic & logit" begin