1 files changed, 70 insertions, 0 deletions
diff --git a/test/psych/test_alias_and_anchor.rb b/test/psych/test_alias_and_anchor.rb
index 48771d6e25..aa4773bce4 100644
--- a/test/psych/test_alias_and_anchor.rb
+++ b/test/psych/test_alias_and_anchor.rb
@@ -1,5 +1,13 @@
 require 'psych/helper'
 
+class ObjectWithInstanceVariables
+  attr_accessor :var1, :var2
+end
+
+class SubStringWithInstanceVariables < String
+  attr_accessor :var1
+end
+
 module Psych
  class TestAliasAndAnchor < TestCase
    def test_mri_compatibility
@@ -14,6 +22,40 @@ EOYAML
      result.each {|el| assert_same(result[0], el) }
    end
 
+   def test_mri_compatibility_object_with_ivars
+  yaml = <<EOYAML
+--- 
+- &id001 !ruby/object:ObjectWithInstanceVariables 
+  var1: test1
+  var2: test2
+- *id001
+- *id001
+EOYAML
+
+     result = Psych.load yaml
+     result.each do |el| 
+      assert_same(result[0], el)
+      assert_equal('test1', el.var1)
+      assert_equal('test2', el.var2)
+    end
+   end
+
+   def test_mri_compatibility_substring_with_ivars
+    yaml = <<EOYAML
+--- 
+- &id001 !str:SubStringWithInstanceVariables 
+  str: test
+  "@var1": test
+- *id001
+- *id001
+EOYAML
+     result = Psych.load yaml
+     result.each do |el|
+      assert_same(result[0], el)
+      assert_equal('test', el.var1)
+    end
+   end
+
    def test_anchor_alias_round_trip
      o = Object.new
      original = [o,o,o]
@@ -22,5 +64,33 @@ EOYAML
      result = Psych.load yaml
      result.each {|el| assert_same(result[0], el) }
    end
+
+   def test_anchor_alias_round_trip_object_with_ivars
+     o = ObjectWithInstanceVariables.new
+     o.var1 = 'test1'
+     o.var2 = 'test2'
+     original = [o,o,o]
+
+     yaml = Psych.dump original
+     result = Psych.load yaml
+     result.each do |el|
+      assert_same(result[0], el)
+      assert_equal('test1', el.var1)
+      assert_equal('test2', el.var2)
+    end
+   end
+
+   def test_anchor_alias_round_trip_substring_with_ivars
+     o = SubStringWithInstanceVariables.new
+     o.var1 = 'test'
+     original = [o,o,o]
+
+     yaml = Psych.dump original
+     result = Psych.load yaml
+     result.each do |el|
+      assert_same(result[0], el)
+      assert_equal('test', el.var1)
+    end
+   end
  end
 end