Merge pull request #29928 from JuliaLang/ksh/wrmissing

Tests for WeakRef and missing
JuliaLang · Nov 6, 2018 · 0fde275 · 0fde275
2 parents 58fea96 + aa502dd
commit 0fde275
Showing 1 changed file with 16 additions and 0 deletions.
diff --git a/test/missing.jl b/test/missing.jl
@@ -34,6 +34,7 @@ end
  @test promote_type(Union{Int, Missing}, Int) == Union{Int, Missing}
  @test promote_type(Int, Union{Int, Missing}) == Union{Int, Missing}
  @test promote_type(Any, Union{Int, Missing}) == Any
+ @test promote_type(Union{Nothing, Missing}, Any) == Any
  @test promote_type(Union{Int, Missing}, Union{Int, Missing}) == Union{Int, Missing}
  @test promote_type(Union{Float64, Missing}, Union{String, Missing}) == Any
  @test promote_type(Union{Float64, Missing}, Union{Int, Missing}) == Union{Float64, Missing}
@@ -433,3 +434,18 @@ end
  @test coalesce(nothing, missing) === nothing
  @test coalesce(missing, nothing) === nothing
 end
+
+mutable struct Obj; x; end
+@testset "weak references" begin
+ @noinline function mk_wr(r, wr)
+ x = Obj(1)
+ push!(r, x)
+ push!(wr, WeakRef(x))
+ nothing
+ end
+ ref = []
+ wref = []
+ mk_wr(ref, wref)
+ @test ismissing(wref[1] == missing)
+ @test ismissing(missing == wref[1])
+end