Minor fix to encoding of long UTF-8 text values

Author: cowtowncoder

src/main/java/com/fasterxml/jackson/core/json/UTF8DataInputJsonParser.java

@@ -1928,12 +1928,12 @@ private final void _finishString2(char[] outBuf, int outPtr, int c)
             case 4: // 4-byte UTF
                 c = _decodeUtf8_4(c);
                 // Let's add first part right away:
-                outBuf[outPtr++] = (char) (0xD800 | (c >> 10));
                 if (outPtr >= outBuf.length) {
                     outBuf = _textBuffer.finishCurrentSegment();
                     outPtr = 0;
                     outEnd = outBuf.length;
                 }
+                outBuf[outPtr++] = (char) (0xD800 | (c >> 10));
                 c = 0xDC00 | (c & 0x3FF);
                 // And let the other char output down below
                 break;

src/test/java/com/fasterxml/jackson/core/read/UTF8NamesParseTest.java

@@ -157,18 +157,20 @@ public void _testUtf8StringTrivial(int mode) throws Exception
 
     public void testUtf8StringValue() throws Exception
     {
-        _testUtf8StringValue(MODE_INPUT_STREAM);
-        _testUtf8StringValue(MODE_DATA_INPUT);
-        _testUtf8StringValue(MODE_INPUT_STREAM_THROTTLED);
+        _testUtf8StringValue(MODE_INPUT_STREAM, 2900);
+        _testUtf8StringValue(MODE_DATA_INPUT, 2900);
+        _testUtf8StringValue(MODE_INPUT_STREAM_THROTTLED, 2900);
+
+        _testUtf8StringValue(MODE_INPUT_STREAM, 5300);
+        _testUtf8StringValue(MODE_DATA_INPUT, 5300);
+        _testUtf8StringValue(MODE_INPUT_STREAM_THROTTLED, 5300);
     }
 
-    public void _testUtf8StringValue(int mode) throws Exception
+    public void _testUtf8StringValue(int mode, int len) throws Exception
     {
         Random r = new Random(13);
-        //int LEN = 72000;
-        int LEN = 720;
-        StringBuilder sb = new StringBuilder(LEN + 20);
-        while (sb.length() < LEN) {
+        StringBuilder sb = new StringBuilder(len + 20);
+        while (sb.length() < len) {
             int c;
             if (r.nextBoolean()) { // ascii
                 c = 32 + (r.nextInt() & 0x3F);
@@ -188,7 +190,7 @@ public void _testUtf8StringValue(int mode) throws Exception
             sb.append((char) c);
         }
 
-        ByteArrayOutputStream bout = new ByteArrayOutputStream(LEN);
+        ByteArrayOutputStream bout = new ByteArrayOutputStream(len + (len >> 2));
         OutputStreamWriter out = new OutputStreamWriter(bout, "UTF-8");
         out.write("[\"");
         String VALUE = sb.toString();