1 files changed, 18 insertions, 0 deletions
diff --git a/test/t/hash.rb b/test/t/hash.rb
index c8d7a70ef..c63b8c009 100644
--- a/test/t/hash.rb
+++ b/test/t/hash.rb
@@ -16,6 +16,13 @@ assert('Hash#[]', '15.2.13.4.2') do
   a = { 'abc' => 'abc' }
 
   assert_equal 'abc', a['abc']
+
+  # Hash#[] should call #default (#3272)
+  hash = {}
+  def hash.default(k); self[k] = 1; end
+  hash[:foo] += 1
+
+  assert_equal 2, hash[:foo]
 end
 
 assert('Hash#[]=', '15.2.13.4.3') do
@@ -37,6 +44,10 @@ assert('Hash#dup') do
   b = a.dup
   a['a'] = 2
   assert_equal({'a' => 1}, b)
+
+  c = Hash.new { |h, k| h[k] = k.upcase }
+  d = c.dup
+  assert_equal("FOO", d["foo"])
 end
 
 assert('Hash#default', '15.2.13.4.5') do
@@ -355,3 +366,10 @@ assert('Hash#rehash') do
   h.rehash
   assert_equal("b", h[[:b]])
 end
+
+assert('Hash#freeze') do
+  h = {}.freeze
+  assert_raise(RuntimeError) do
+    h[:a] = 'b'
+  end
+end