From b43ebcf61f456bc14fc7265a541eb2593702f09c Mon Sep 17 00:00:00 2001
From: YongHee Kim <42163454+yongheekim-dev@users.noreply.github.com>
Date: Thu, 23 Jul 2020 01:18:32 +0900
Subject: [PATCH] treat `Missing` as `null` (#21)

Co-authored-by: Oscar Dowson <odow@users.noreply.github.com>
---
 src/validation.jl | 1 +
 test/runtests.jl  | 2 ++
 2 files changed, 3 insertions(+)

diff --git a/src/validation.jl b/src/validation.jl
index b4d4920..4744f7a 100644
--- a/src/validation.jl
+++ b/src/validation.jl
@@ -317,6 +317,7 @@ _is_type(::Bool, ::Val{:boolean}) = true
 _is_type(::Integer, ::Val{:integer}) = true
 _is_type(::Real, ::Val{:number}) = true
 _is_type(::Nothing, ::Val{:null}) = true
+_is_type(::Missing, ::Val{:null}) = true
 _is_type(::AbstractDict, ::Val{:object}) = true
 _is_type(::String, ::Val{:string}) = true
 # Note that Julia treat's Bool <: Number, but JSON-Schema distinguishes them.
diff --git a/test/runtests.jl b/test/runtests.jl
index 540fc78..16b685d 100644
--- a/test/runtests.jl
+++ b/test/runtests.jl
@@ -276,6 +276,8 @@ end
         @test JSONSchema._is_type(val, Val(Symbol(key)))
         @test !JSONSchema._is_type(:not_a_json_type, Val(Symbol(key)))
     end
+    @test JSONSchema._is_type(missing, Val(:null))
+
     @test !JSONSchema._is_type(true, Val(:number))
     @test !JSONSchema._is_type(true, Val(:integer))
 end