1 files changed, 218 insertions, 0 deletions
diff --git a/spec/ruby/core/io/external_encoding_spec.rb b/spec/ruby/core/io/external_encoding_spec.rb
new file mode 100644
index 0000000000..ec85eba2ee
--- /dev/null
+++ b/spec/ruby/core/io/external_encoding_spec.rb
@@ -0,0 +1,218 @@
+require File.expand_path('../../../spec_helper', __FILE__)
+
+with_feature :encoding do
+  describe :io_external_encoding_write, shared: true do
+    describe "when Encoding.default_internal is nil" do
+      before :each do
+        Encoding.default_internal = nil
+      end
+
+      it "returns nil" do
+        @io = new_io @name, @object
+        Encoding.default_external = Encoding::IBM437
+        @io.external_encoding.should be_nil
+      end
+
+      it "returns the external encoding specified when the instance was created" do
+        @io = new_io @name, "#{@object}:ibm866"
+        Encoding.default_external = Encoding::IBM437
+        @io.external_encoding.should equal(Encoding::IBM866)
+      end
+
+      it "returns the encoding set by #set_encoding" do
+        @io = new_io @name, "#{@object}:ibm866"
+        @io.set_encoding Encoding::EUC_JP, nil
+        @io.external_encoding.should equal(Encoding::EUC_JP)
+      end
+    end
+
+    describe "when Encoding.default_external != Encoding.default_internal" do
+      before :each do
+        Encoding.default_external = Encoding::IBM437
+        Encoding.default_internal = Encoding::IBM866
+      end
+
+      it "returns the value of Encoding.default_external when the instance was created" do
+        @io = new_io @name, @object
+        Encoding.default_external = Encoding::UTF_8
+        @io.external_encoding.should equal(Encoding::IBM437)
+      end
+
+      it "returns the external encoding specified when the instance was created" do
+        @io = new_io @name, "#{@object}:ibm866"
+        Encoding.default_external = Encoding::IBM437
+        @io.external_encoding.should equal(Encoding::IBM866)
+      end
+
+      it "returns the encoding set by #set_encoding" do
+        @io = new_io @name, "#{@object}:ibm866"
+        @io.set_encoding Encoding::EUC_JP, nil
+        @io.external_encoding.should equal(Encoding::EUC_JP)
+      end
+    end
+
+    describe "when Encoding.default_external == Encoding.default_internal" do
+      before :each do
+        Encoding.default_external = Encoding::IBM866
+        Encoding.default_internal = Encoding::IBM866
+      end
+
+      it "returns the value of Encoding.default_external when the instance was created" do
+        @io = new_io @name, @object
+        Encoding.default_external = Encoding::UTF_8
+        @io.external_encoding.should equal(Encoding::IBM866)
+      end
+
+      it "returns the external encoding specified when the instance was created" do
+        @io = new_io @name, "#{@object}:ibm866"
+        Encoding.default_external = Encoding::IBM437
+        @io.external_encoding.should equal(Encoding::IBM866)
+      end
+
+      it "returns the encoding set by #set_encoding" do
+        @io = new_io @name, "#{@object}:ibm866"
+        @io.set_encoding Encoding::EUC_JP, nil
+        @io.external_encoding.should equal(Encoding::EUC_JP)
+      end
+    end
+  end
+
+  describe "IO#external_encoding" do
+    before :each do
+      @external = Encoding.default_external
+      @internal = Encoding.default_internal
+
+      @name = tmp("io_external_encoding")
+      touch(@name)
+    end
+
+    after :each do
+      Encoding.default_external = @external
+      Encoding.default_internal = @internal
+
+      @io.close if @io
+      rm_r @name
+    end
+
+    describe "with 'r' mode" do
+      describe "when Encoding.default_internal is nil" do
+        before :each do
+          Encoding.default_internal = nil
+          Encoding.default_external = Encoding::IBM866
+        end
+
+        it "returns Encoding.default_external if the external encoding is not set" do
+          @io = new_io @name, "r"
+          @io.external_encoding.should equal(Encoding::IBM866)
+        end
+
+        it "returns Encoding.default_external when that encoding is changed after the instance is created" do
+          @io = new_io @name, "r"
+          Encoding.default_external = Encoding::IBM437
+          @io.external_encoding.should equal(Encoding::IBM437)
+        end
+
+        it "returns the external encoding specified when the instance was created" do
+          @io = new_io @name, "r:utf-8"
+          Encoding.default_external = Encoding::IBM437
+          @io.external_encoding.should equal(Encoding::UTF_8)
+        end
+
+        it "returns the encoding set by #set_encoding" do
+          @io = new_io @name, "r:utf-8"
+          @io.set_encoding Encoding::EUC_JP, nil
+          @io.external_encoding.should equal(Encoding::EUC_JP)
+        end
+      end
+
+      describe "when Encoding.default_external == Encoding.default_internal" do
+        before :each do
+          Encoding.default_external = Encoding::IBM866
+          Encoding.default_internal = Encoding::IBM866
+        end
+
+        it "returns the value of Encoding.default_external when the instance was created" do
+          @io = new_io @name, "r"
+          Encoding.default_external = Encoding::IBM437
+          @io.external_encoding.should equal(Encoding::IBM866)
+        end
+
+        it "returns the external encoding specified when the instance was created" do
+          @io = new_io @name, "r:utf-8"
+          Encoding.default_external = Encoding::IBM437
+          @io.external_encoding.should equal(Encoding::UTF_8)
+        end
+
+        it "returns the encoding set by #set_encoding" do
+          @io = new_io @name, "r:utf-8"
+          @io.set_encoding Encoding::EUC_JP, nil
+          @io.external_encoding.should equal(Encoding::EUC_JP)
+        end
+      end
+
+      describe "when Encoding.default_external != Encoding.default_internal" do
+        before :each do
+          Encoding.default_external = Encoding::IBM437
+          Encoding.default_internal = Encoding::IBM866
+        end
+
+
+        it "returns the external encoding specified when the instance was created" do
+          @io = new_io @name, "r:utf-8"
+          Encoding.default_external = Encoding::IBM437
+          @io.external_encoding.should equal(Encoding::UTF_8)
+        end
+
+        it "returns the encoding set by #set_encoding" do
+          @io = new_io @name, "r:utf-8"
+          @io.set_encoding Encoding::EUC_JP, nil
+          @io.external_encoding.should equal(Encoding::EUC_JP)
+        end
+      end
+    end
+
+    describe "with 'rb' mode" do
+      it "returns Encoding::ASCII_8BIT" do
+        @io = new_io @name, "rb"
+        @io.external_encoding.should equal(Encoding::ASCII_8BIT)
+      end
+
+      it "returns the external encoding specified by the mode argument" do
+        @io = new_io @name, "rb:ibm437"
+        @io.external_encoding.should equal(Encoding::IBM437)
+      end
+    end
+
+    describe "with 'r+' mode" do
+      it_behaves_like :io_external_encoding_write, nil, "r+"
+    end
+
+    describe "with 'w' mode" do
+      it_behaves_like :io_external_encoding_write, nil, "w"
+    end
+
+    describe "with 'wb' mode" do
+      it "returns Encoding::ASCII_8BIT" do
+        @io = new_io @name, "wb"
+        @io.external_encoding.should equal(Encoding::ASCII_8BIT)
+      end
+
+      it "returns the external encoding specified by the mode argument" do
+        @io = new_io @name, "wb:ibm437"
+        @io.external_encoding.should equal(Encoding::IBM437)
+      end
+    end
+
+    describe "with 'w+' mode" do
+      it_behaves_like :io_external_encoding_write, nil, "w+"
+    end
+
+    describe "with 'a' mode" do
+      it_behaves_like :io_external_encoding_write, nil, "a"
+    end
+
+    describe "with 'a+' mode" do
+      it_behaves_like :io_external_encoding_write, nil, "a+"
+    end
+  end
+end