1 files changed, 12 insertions, 0 deletions
diff --git a/spec/ruby/language/alias_spec.rb b/spec/ruby/language/alias_spec.rb
index 306c2776b4..a7f34146d1 100644
--- a/spec/ruby/language/alias_spec.rb
+++ b/spec/ruby/language/alias_spec.rb
@@ -244,3 +244,15 @@ describe "The alias keyword" do
     }
   end
 end
+
+describe "The alias keyword" do
+  it "can create a new global variable, synonym of the original" do
+    code = '$a = 1; alias $b $a; p [$a, $b]; $b = 2; p [$a, $b]'
+    ruby_exe(code).should == "[1, 1]\n[2, 2]\n"
+  end
+
+  it "can override an existing global variable and make them synonyms" do
+    code = '$a = 1; $b = 2; alias $b $a; p [$a, $b]; $b = 3; p [$a, $b]'
+    ruby_exe(code).should == "[1, 1]\n[3, 3]\n"
+  end
+end