1 files changed, 39 insertions, 0 deletions
diff --git a/spec/rubyspec/core/encoding/converter/asciicompat_encoding_spec.rb b/spec/rubyspec/core/encoding/converter/asciicompat_encoding_spec.rb
new file mode 100644
index 0000000000..329e09cade
--- /dev/null
+++ b/spec/rubyspec/core/encoding/converter/asciicompat_encoding_spec.rb
@@ -0,0 +1,39 @@
+require File.expand_path('../../../../spec_helper', __FILE__)
+
+with_feature :encoding do
+  describe "Encoding::Converter.asciicompat_encoding" do
+    it "accepts an encoding name as a String argument" do
+      lambda { Encoding::Converter.asciicompat_encoding('UTF-8') }.
+        should_not raise_error
+    end
+
+    it "coerces non-String/Encoding objects with #to_str" do
+      str = mock('string')
+      str.should_receive(:to_str).at_least(1).times.and_return('string')
+      Encoding::Converter.asciicompat_encoding(str)
+    end
+
+    it "accepts an Encoding object as an argument" do
+      Encoding::Converter.
+        asciicompat_encoding(Encoding.find("ISO-2022-JP")).
+        should == Encoding::Converter.asciicompat_encoding("ISO-2022-JP")
+    end
+
+    it "returns a corresponding ASCII compatible encoding for ASCII-incompatible encodings" do
+      Encoding::Converter.asciicompat_encoding('UTF-16BE').should == Encoding::UTF_8
+      Encoding::Converter.asciicompat_encoding("ISO-2022-JP").should == Encoding.find("stateless-ISO-2022-JP")
+    end
+
+    it "returns nil when the given encoding is ASCII compatible" do
+      Encoding::Converter.asciicompat_encoding('ASCII').should be_nil
+      Encoding::Converter.asciicompat_encoding('UTF-8').should be_nil
+    end
+
+    it "handles encoding names who resolve to nil encodings" do
+      internal = Encoding.default_internal
+      Encoding.default_internal = nil
+      Encoding::Converter.asciicompat_encoding('internal').should be_nil
+      Encoding.default_internal = internal
+    end
+  end
+end