* object.c (rb_Hash): add Kernel#Hash conversion method like

  Array() or Float().  a patch from Run Paint Run Run.  Fix #3131

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@34367 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 13 insertions, 0 deletions

diff --git a/test/ruby/test_object.rb b/test/ruby/test_object.rb
index b05375ebba..15e7b72e35 100644
--- a/test/ruby/test_object.rb
+++ b/test/ruby/test_object.rb
@@ -197,6 +197,19 @@ class TestObject < Test::Unit::TestCase
     assert_equal([o], Array(o))
   end
 
+  def test_convert_hash
+    assert_equal(Hash(nil), {})
+    assert_equal(Hash([]), {})
+    assert_equal(Hash(key: :value), {key: :value})
+    assert_raise(TypeError) { Hash([1,2]) }
+    assert_raise(TypeError) { Hash(Object.new) }
+    o = Object.new
+    def o.to_hash; {a: 1, b: 2}; end
+    assert_equal(Hash(o), {a: 1, b: 2})
+    def o.to_hash; 9; end
+    assert_raise(TypeError) { Hash(o) }
+  end
+
   def test_to_integer
     o = Object.new
     def o.to_i; nil; end