1 files changed, 45 insertions, 0 deletions
diff --git a/spec/ruby/core/encoding/aliases_spec.rb b/spec/ruby/core/encoding/aliases_spec.rb
new file mode 100644
index 0000000000..327c8fa641
--- /dev/null
+++ b/spec/ruby/core/encoding/aliases_spec.rb
@@ -0,0 +1,45 @@
+require File.expand_path('../../../spec_helper', __FILE__)
+
+with_feature :encoding do
+  describe "Encoding.aliases" do
+    it "returns a Hash" do
+      Encoding.aliases.should be_an_instance_of(Hash)
+    end
+
+    it "has Strings as keys" do
+      Encoding.aliases.keys.each do |key|
+        key.should be_an_instance_of(String)
+      end
+    end
+
+    it "has Strings as values" do
+      Encoding.aliases.values.each do |value|
+        value.should be_an_instance_of(String)
+      end
+    end
+
+    it "has alias names as its keys" do
+      Encoding.aliases.key?('BINARY').should be_true
+      Encoding.aliases.key?('ASCII').should be_true
+    end
+
+    it "has the names of the aliased encoding as its values" do
+      Encoding.aliases['BINARY'].should == 'ASCII-8BIT'
+      Encoding.aliases['ASCII'].should == 'US-ASCII'
+    end
+
+    it "has an 'external' key with the external default encoding as its value" do
+      Encoding.aliases['external'].should == Encoding.default_external.name
+    end
+
+    it "has a 'locale' key and its value equals to the name of the encoding finded by the locale charmap" do
+      Encoding.aliases['locale'].should == Encoding.find(Encoding.locale_charmap).name
+    end
+
+    it "only contains valid aliased encodings" do
+      Encoding.aliases.each do |aliased, original|
+        Encoding.find(aliased).should == Encoding.find(original)
+      end
+    end
+  end
+end