Move spec to shared spec since it applies for StringIO#{write_nonblock,syswrite} too

Author: eregon

spec/ruby/library/stringio/shared/write.rb

@@ -88,6 +88,25 @@
     @io.write "fghi"
     @io.string.should == "12fghi"
   end
+
+  describe "transcoding" do
+    describe "when UTF-16 encoding is set" do
+      it "accepts a UTF-8-encoded string and transcodes it" do
+        io = StringIO.new.set_encoding(Encoding::UTF_16BE)
+        utf8_str = "hello"
+
+        io.send(@method, utf8_str)
+
+        result = io.string
+        expected = [
+          0, 104, 0, 101, 0, 108, 0, 108, 0, 111, # double-width "hello"
+        ]
+
+        io.external_encoding.should == Encoding::UTF_16BE
+        result.bytes.should == expected
+      end
+    end
+  end
 end
 
 describe :stringio_write_not_writable, shared: true do

spec/ruby/library/stringio/write_spec.rb

@@ -17,22 +17,3 @@
 describe "StringIO#write when in append mode" do
   it_behaves_like :stringio_write_append, :write
 end
-
-describe "StringIO#write transcoding" do
-  describe "when UTF-16 encoding is set" do
-    it "accepts a UTF-8-encoded string and transcodes it" do
-      io = StringIO.new.set_encoding(Encoding::UTF_16BE)
-      utf8_str = "hello"
-
-      io.write(utf8_str)
-
-      result = io.string
-      expected = [
-        0, 104, 0, 101, 0, 108, 0, 108, 0, 111, # double-width "hello"
-      ]
-
-      io.external_encoding.should == Encoding::UTF_16BE
-      result.bytes.should == expected
-    end
-  end
-end