Properly create slices from utf8 strings.

Fixes #426.

packages/grpc-native-core/ext/slice.cc

@@ -51,7 +51,7 @@ void buffer_destroy_func(void *user_data) {
 grpc_slice CreateSliceFromString(const Local<String> source) {
   Nan::HandleScope scope;
   Nan::Utf8String *utf8_value = new Nan::Utf8String(source);
-  return grpc_slice_new_with_user_data(**utf8_value, source->Length(),
+  return grpc_slice_new_with_user_data(**utf8_value, utf8_value->length(),
                                        string_destroy_func, utf8_value);
 }
 

packages/grpc-native-core/test/surface_test.js

@@ -839,8 +839,12 @@ describe('Other conditions', function() {
       unary: function(call, cb) {
         var req = call.request;
         if (req.error) {
+          var message = 'Requested error';
+          if (req.message) {
+            message = req.message;
+          }
           cb({code: grpc.status.UNKNOWN,
-              details: 'Requested error'}, null, trailer_metadata);
+              details: message}, null, trailer_metadata);
         } else {
           cb(null, {count: 1}, trailer_metadata);
         }
@@ -850,8 +854,12 @@ describe('Other conditions', function() {
         var errored;
         stream.on('data', function(data) {
           if (data.error) {
+            var message = 'Requested error';
+            if (data.message) {
+              message = data.message;
+            }
             errored = true;
-            cb(new Error('Requested error'), null, trailer_metadata);
+            cb(new Error(message), null, trailer_metadata);
           } else {
             count += 1;
           }
@@ -865,8 +873,12 @@ describe('Other conditions', function() {
       serverStream: function(stream) {
         var req = stream.request;
         if (req.error) {
+          var message = 'Requested error';
+          if (req.message) {
+            message = req.message;
+          }
           var err = {code: grpc.status.UNKNOWN,
-                     details: 'Requested error'};
+                     details: message};
           err.metadata = trailer_metadata;
           stream.emit('error', err);
         } else {
@@ -880,7 +892,11 @@ describe('Other conditions', function() {
         var count = 0;
         stream.on('data', function(data) {
           if (data.error) {
-            var err = new Error('Requested error');
+            var message = 'Requested error';
+            if (data.message) {
+              message = data.message;
+            }
+            var err = new Error(message);
             err.metadata = trailer_metadata.clone();
             err.metadata.add('count', '' + count);
             stream.emit('error', err);
@@ -1127,6 +1143,14 @@ describe('Other conditions', function() {
         done();
       });
     });
+    it('for a UTF-8 error message', function(done) {
+      client.unary({error: true, message: '測試字符串'}, function(err, data) {
+        assert(err);
+        assert.strictEqual(err.code, grpc.status.UNKNOWN);
+        assert.strictEqual(err.details, '測試字符串');
+        done();
+      });
+    });
   });
   describe('call.getPeer should return the peer', function() {
     it('for a unary call', function(done) {

packages/grpc-native-core/test/test_service.proto

@@ -16,6 +16,7 @@ syntax = "proto3";
 
 message Request {
   bool error = 1;
+  string message = 2;
 }
 
 message Response {

test/interop/interop_client.js

@@ -347,13 +347,13 @@ function statusCodeAndMessage(client, done) {
   var arg = {
     response_status: {
       code: 2,
-      message: 'test status message'
+      message: 'test status message - 測試字符串'
     }
   };
   client.unaryCall(arg, function(err, resp) {
     assert(err);
     assert.strictEqual(err.code, 2);
-    assert.strictEqual(err.details, 'test status message');
+    assert.strictEqual(err.details, 'test status message - 測試字符串');
     done();
   });
   var duplex = client.fullDuplexCall();
@@ -361,7 +361,7 @@ function statusCodeAndMessage(client, done) {
   duplex.on('status', function(status) {
     assert(status);
     assert.strictEqual(status.code, 2);
-    assert.strictEqual(status.details, 'test status message');
+    assert.strictEqual(status.details, 'test status message - 測試字符串');
     done();
   });
   duplex.on('error', function(){});