1 files changed, 65 insertions, 0 deletions
diff --git a/spec/ruby/core/encoding/converter/convpath_spec.rb b/spec/ruby/core/encoding/converter/convpath_spec.rb
new file mode 100644
index 0000000000..679b894f58
--- /dev/null
+++ b/spec/ruby/core/encoding/converter/convpath_spec.rb
@@ -0,0 +1,65 @@
+require File.expand_path('../../../../spec_helper', __FILE__)
+
+with_feature :encoding do
+  describe "Encoding::Converter#convpath" do
+    before :all do
+      @perms = Encoding.name_list.permutation(2).map do |pair|
+        Encoding::Converter.new(pair.first, pair.last) rescue nil
+      end.compact.map{|ec| ec.convpath}
+    end
+
+    it "returns an Array" do
+      ec = Encoding::Converter.new('ASCII', 'EUC-JP')
+      ec.convpath.should be_an_instance_of(Array)
+    end
+
+    it "returns each encoding pair as a sub-Array" do
+      ec = Encoding::Converter.new('ASCII', 'EUC-JP')
+      ec.convpath.first.should be_an_instance_of(Array)
+      ec.convpath.first.size.should == 2
+    end
+
+    it "returns each encoding as an Encoding object" do
+      ec = Encoding::Converter.new('ASCII', 'EUC-JP')
+      ec.convpath.first.first.should be_an_instance_of(Encoding)
+      ec.convpath.first.last.should be_an_instance_of(Encoding)
+    end
+
+    it "returns multiple encoding pairs when direct conversion is impossible" do
+      ec = Encoding::Converter.new('ascii','Big5')
+      ec.convpath.size.should == 2
+      ec.convpath.first.first.should == Encoding::US_ASCII
+      ec.convpath.first.last.should == ec.convpath.last.first
+      ec.convpath.last.last.should == Encoding::Big5
+    end
+
+    it "sets the last element of each pair to the first element of the next" do
+      @perms.each do |convpath|
+        next if convpath.size == 1
+        convpath.each_with_index do |pair, idx|
+          break if idx == convpath.size - 1
+          pair.last.should == convpath[idx+1].first
+        end
+      end
+    end
+
+    it "only lists a source encoding once" do
+      @perms.each do |convpath|
+        next if convpath.size < 2
+        seen = Hash.new(false)
+        convpath.each_with_index do |pair, idx|
+          seen.key?(pair.first).should be_false if idx > 0
+          seen[pair.first] = true
+        end
+      end
+    end
+
+    it "indicates if crlf_newline conversion would occur" do
+      ec = Encoding::Converter.new("ISo-8859-1", "EUC-JP", {crlf_newline: true})
+      ec.convpath.last.should == "crlf_newline"
+
+      ec = Encoding::Converter.new("ASCII", "UTF-8", {crlf_newline: false})
+      ec.convpath.last.should_not == "crlf_newline"
+    end
+  end
+end