Update to ruby/spec@9277d27

spec/ruby/core/string/encode_spec.rb

@@ -19,13 +19,17 @@ describe "String#encode" do
     it "returns a copy when Encoding.default_internal is nil" do
       Encoding.default_internal = nil
       str = "あ"
-      str.encode.should_not equal(str)
+      encoded = str.encode
+      encoded.should_not equal(str)
+      encoded.should == str
     end
 
     it "returns a copy for a ASCII-only String when Encoding.default_internal is nil" do
       Encoding.default_internal = nil
       str = "abc"
-      str.encode.should_not equal(str)
+      encoded = str.encode
+      encoded.should_not equal(str)
+      encoded.should == str
     end
 
     it "encodes an ascii substring of a binary string to UTF-8" do
@@ -39,7 +43,9 @@ describe "String#encode" do
   describe "when passed to encoding" do
     it "returns a copy when passed the same encoding as the String" do
       str = "あ"
-      str.encode(Encoding::UTF_8).should_not equal(str)
+      encoded = str.encode(Encoding::UTF_8)
+      encoded.should_not equal(str)
+      encoded.should == str
     end
 
     it "round trips a String" do
@@ -75,6 +81,7 @@ describe "String#encode" do
       encoded = str.encode("utf-8", "utf-8")
 
       encoded.should_not equal(str)
+      encoded.should == str.force_encoding("utf-8")
       encoded.encoding.should == Encoding::UTF_8
     end
 
@@ -87,14 +94,28 @@ describe "String#encode" do
   describe "when passed to, options" do
     it "returns a copy when the destination encoding is the same as the String encoding" do
       str = "あ"
-      str.encode(Encoding::UTF_8, undef: :replace).should_not equal(str)
+      encoded = str.encode(Encoding::UTF_8, undef: :replace)
+      encoded.should_not equal(str)
+      encoded.should == str
     end
   end
 
   describe "when passed to, from, options" do
     it "returns a copy when both encodings are the same" do
       str = "あ"
-      str.encode("utf-8", "utf-8", invalid: :replace).should_not equal(str)
+      encoded = str.encode("utf-8", "utf-8", invalid: :replace)
+      encoded.should_not equal(str)
+      encoded.should == str
+    end
+
+    it "returns a copy in the destination encoding when both encodings are the same" do
+      str = "あ"
+      str.force_encoding("binary")
+      encoded = str.encode("utf-8", "utf-8", invalid: :replace)
+
+      encoded.should_not equal(str)
+      encoded.should == str.force_encoding("utf-8")
+      encoded.encoding.should == Encoding::UTF_8
     end
   end
 end