1 files changed, 24 insertions, 0 deletions
diff --git a/test/ruby/test_hash.rb b/test/ruby/test_hash.rb
index 088178defa..11735c5620 100644
--- a/test/ruby/test_hash.rb
+++ b/test/ruby/test_hash.rb
@@ -1123,11 +1123,35 @@ class TestHash < Test::Unit::TestCase
     assert_equal({1=>6, 3=>4, 5=>7}, h1)
   end
 
+  def test_update3
+    h1 = @cls[1=>2, 3=>4]
+    h1.update()
+    assert_equal({1=>2, 3=>4}, h1)
+    h2 = {1=>3, 5=>7}
+    h3 = {1=>1, 2=>4}
+    h1.update(h2, h3)
+    assert_equal({1=>1, 2=>4, 3=>4, 5=>7}, h1)
+  end
+
+  def test_update4
+    h1 = @cls[1=>2, 3=>4]
+    h1.update(){|k, v1, v2| k + v1 + v2 }
+    assert_equal({1=>2, 3=>4}, h1)
+    h2 = {1=>3, 5=>7}
+    h3 = {1=>1, 2=>4}
+    h1.update(h2, h3){|k, v1, v2| k + v1 + v2 }
+    assert_equal({1=>8, 2=>4, 3=>4, 5=>7}, h1)
+  end
+
   def test_merge
     h1 = @cls[1=>2, 3=>4]
     h2 = {1=>3, 5=>7}
+    h3 = {1=>1, 2=>4}
+    assert_equal({1=>2, 3=>4}, h1.merge())
     assert_equal({1=>3, 3=>4, 5=>7}, h1.merge(h2))
     assert_equal({1=>6, 3=>4, 5=>7}, h1.merge(h2) {|k, v1, v2| k + v1 + v2 })
+    assert_equal({1=>1, 2=>4, 3=>4, 5=>7}, h1.merge(h2, h3))
+    assert_equal({1=>8, 2=>4, 3=>4, 5=>7}, h1.merge(h2, h3) {|k, v1, v2| k + v1 + v2 })
   end
 
   def test_assoc