Add in-tree mspec and ruby/spec

* For easier modifications of ruby/spec by MRI developers.
* .gitignore: track changes under spec.
* spec/mspec, spec/rubyspec: add in-tree mspec and ruby/spec.
  These files can therefore be updated like any other file in MRI.
  Instructions are provided in spec/README.
  [Feature #13156] [ruby-core:79246]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@58595 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 73 insertions, 0 deletions

diff --git a/spec/rubyspec/core/encoding/converter/search_convpath_spec.rb b/spec/rubyspec/core/encoding/converter/search_convpath_spec.rb
new file mode 100644
index 0000000000..c04eeb98ad
--- /dev/null
+++ b/spec/rubyspec/core/encoding/converter/search_convpath_spec.rb
@@ -0,0 +1,73 @@
+require File.expand_path('../../../../spec_helper', __FILE__)
+
+with_feature :encoding do
+  describe "Encoding::Converter.search_convpath" do
+    before :all do
+      @perms = Encoding.name_list.permutation(2).map do |pair|
+        Encoding::Converter.search_convpath(pair.first, pair.last) rescue []
+      end
+    end
+
+    it "returns an Array" do
+      Encoding::Converter.search_convpath('ASCII', 'EUC-JP').\
+        should be_an_instance_of(Array)
+    end
+
+    it "returns each encoding pair as a sub-Array" do
+      cp = Encoding::Converter.search_convpath('ASCII', 'EUC-JP')
+      cp.first.should be_an_instance_of(Array)
+      cp.first.size.should == 2
+    end
+
+    it "returns each encoding as an Encoding object" do
+      cp = Encoding::Converter.search_convpath('ASCII', 'EUC-JP')
+      cp.first.first.should be_an_instance_of(Encoding)
+      cp.first.last.should be_an_instance_of(Encoding)
+    end
+
+    it "returns multiple encoding pairs when direct conversion is impossible" do
+      cp = Encoding::Converter.search_convpath('ascii','Big5')
+      cp.size.should == 2
+      cp.first.should == [Encoding::US_ASCII, Encoding::UTF_8]
+      cp.last.should == [Encoding::UTF_8, 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
+      cp = Encoding::Converter.search_convpath(
+        "ISo-8859-1", "EUC-JP", {crlf_newline: true})
+      cp.last.should == "crlf_newline"
+
+      cp = Encoding::Converter.search_convpath(
+        "ASCII", "UTF-8", {crlf_newline: false})
+      cp.last.should_not == "crlf_newline"
+    end
+
+    it "raises an Encoding::ConverterNotFoundError if no conversion path exists" do
+      lambda do
+        Encoding::Converter.search_convpath(
+          Encoding::ASCII_8BIT, Encoding::Emacs_Mule)
+      end.should raise_error(Encoding::ConverterNotFoundError)
+    end
+  end
+end