1 files changed, 74 insertions, 0 deletions
diff --git a/spec/ruby/core/encoding/default_external_spec.rb b/spec/ruby/core/encoding/default_external_spec.rb
new file mode 100644
index 0000000000..2b026c793f
--- /dev/null
+++ b/spec/ruby/core/encoding/default_external_spec.rb
@@ -0,0 +1,74 @@
+require File.expand_path('../../../spec_helper', __FILE__)
+
+with_feature :encoding do
+  describe "Encoding.default_external" do
+    before :each do
+      @original_encoding = Encoding.default_external
+    end
+
+    after :each do
+      Encoding.default_external = @original_encoding
+    end
+
+    it "returns an Encoding object" do
+      Encoding.default_external.should be_an_instance_of(Encoding)
+    end
+
+    it "returns the default external encoding" do
+      Encoding.default_external = Encoding::UTF_8
+      Encoding.default_external.should == Encoding::UTF_8
+    end
+
+    describe "with command line options" do
+      it "is not changed by the -U option" do
+        result = ruby_exe("print Encoding.default_external", options: '-U')
+        result.should == Encoding.default_external.name
+      end
+
+      it "returns the encoding specified by '-E external'" do
+        result = ruby_exe("print Encoding.default_external", options: '-E euc-jp')
+        result.should == "EUC-JP"
+      end
+
+      it "returns the encoding specified by '-E external:'" do
+        result = ruby_exe("print Encoding.default_external", options: '-E Shift_JIS:')
+        result.should == "Shift_JIS"
+      end
+    end
+  end
+
+  describe "Encoding.default_external=" do
+    before :each do
+      @original_encoding = Encoding.default_external
+    end
+
+    after :each do
+      Encoding.default_external = @original_encoding
+    end
+
+    it "sets the default external encoding" do
+      Encoding.default_external = Encoding::UTF_8
+      Encoding.default_external.should == Encoding::UTF_8
+    end
+
+    it "can accept a name of an encoding as a String" do
+      Encoding.default_external = 'Shift_JIS'
+      Encoding.default_external.should == Encoding::SHIFT_JIS
+    end
+
+    it "calls #to_s on arguments that are neither Strings nor Encodings" do
+      string = mock('string')
+      string.should_receive(:to_str).at_least(1).and_return('US-ASCII')
+      Encoding.default_external = string
+      Encoding.default_external.should == Encoding::ASCII
+    end
+
+    it "raises a TypeError unless the argument is an Encoding or convertible to a String" do
+      lambda { Encoding.default_external = [] }.should raise_error(TypeError)
+    end
+
+    it "raises an ArgumentError if the argument is nil" do
+      lambda { Encoding.default_external = nil }.should raise_error(ArgumentError)
+    end
+  end
+end