1 files changed, 69 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..9aae4976e0
--- /dev/null
+++ b/spec/ruby/core/encoding/default_external_spec.rb
@@ -0,0 +1,69 @@
+require_relative '../../spec_helper'
+
+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::SHIFT_JIS
+    Encoding.default_external.should == Encoding::SHIFT_JIS
+  end
+
+  platform_is :windows do
+    it 'is UTF-8 by default on Windows' do
+      Encoding.default_external.should == Encoding::UTF_8
+    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::SHIFT_JIS
+    Encoding.default_external.should == Encoding::SHIFT_JIS
+    Encoding.find('external').should == Encoding::SHIFT_JIS
+  end
+
+  platform_is_not :windows do
+    it "also sets the filesystem encoding" do
+      Encoding.default_external = Encoding::SHIFT_JIS
+      Encoding.find('filesystem').should == Encoding::SHIFT_JIS
+    end
+  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
+    -> { Encoding.default_external = [] }.should raise_error(TypeError)
+  end
+
+  it "raises an ArgumentError if the argument is nil" do
+    -> { Encoding.default_external = nil }.should raise_error(ArgumentError)
+  end
+end