1 files changed, 12 insertions, 0 deletions
diff --git a/mrbgems/mruby-hash-ext/test/hash.rb b/mrbgems/mruby-hash-ext/test/hash.rb
index b43541b7f..6e70953f5 100644
--- a/mrbgems/mruby-hash-ext/test/hash.rb
+++ b/mrbgems/mruby-hash-ext/test/hash.rb
@@ -39,6 +39,12 @@ assert('Hash.[] "c_key", "c_value"') do
   end
 end
 
+assert('Hash.[] for sub class') do
+  sub_hash_class = Class.new(Hash)
+  sub_hash = sub_hash_class[]
+  assert_equal(sub_hash_class, sub_hash.class)
+end
+
 assert('Hash.try_convert') do
   assert_nil Hash.try_convert(nil)
   assert_nil Hash.try_convert("{1=>2}")
@@ -143,6 +149,12 @@ assert("Hash#invert") do
   assert_equal('b', h[2])
 end
 
+assert("Hash#invert with sub class") do
+  sub_hash_class = Class.new(Hash)
+  sub_hash = sub_hash_class.new
+  assert_equal(sub_hash_class, sub_hash.invert.class)
+end
+
 assert("Hash#keep_if") do
   h = { 1 => 2, 3 => 4, 5 => 6 }
   assert_equal({3=>4,5=>6}, h.keep_if {|k, v| k + v >= 7 })