fix validate_utf8: false encoding coercion

the string we get back from ffi is tagged as ascii encoded by default,
so we must force encode it first.

then we don't want to convert from binary to utf-8 since that will wind
up mangling all the utf-8 characters, we want to convert from utf-8
to utf-8 while replacing invalid characters.

1 files changed, 6 insertions, 0 deletions

diff --git a/spec/ffi_yajl/encoder_spec.rb b/spec/ffi_yajl/encoder_spec.rb
index 91009f4..e7f17ce 100644
--- a/spec/ffi_yajl/encoder_spec.rb
+++ b/spec/ffi_yajl/encoder_spec.rb
@@ -180,6 +180,7 @@ describe "FFI_Yajl::Encoder" do
           "passwd" => {
             "root" => { "dir" => "/root", "gid" => 0, "uid" => 0, "shell" => "/bin/sh", "gecos" => "Elan Ruusam\xc3\xa4e" },
             "glen" => { "dir" => "/home/glen", "gid" => 500, "uid" => 500, "shell" => "/bin/bash", "gecos" => "Elan Ruusam\xE4e" },
+            "helmüt" => { "dir" => "/home/helmüt", "gid" => 500, "uid" => 500, "shell" => "/bin/bash", "gecos" => "Hañs Helmüt" },
           },
         },
       },
@@ -203,6 +204,11 @@ describe "FFI_Yajl::Encoder" do
       it "returns valid utf8" do
         expect( encoder.encode(ruby).valid_encoding? ).to be true
       end
+
+      it "does not mangle valid utf8" do
+        json = encoder.encode(ruby)
+        expect(json).to match(/Hañs Helmüt/)
+      end
     end
   end
 end