add another testcase as described by predatorvi in JERSEY-3214

Author: MarkusKull

connectors/apache-connector/src/test/java/org/glassfish/jersey/apache/connector/ClosingTest.java

@@ -141,6 +141,25 @@ public void testClosingConsumedResponse() throws Exception {
         assertEquals(1, getAvailableConnections());
     }
 
+    @Test
+    public void testBufferedMultipleReadEntity() throws Exception {
+        assertEquals(0, getOpenConnections());
+
+        Response response = target().path("productInfo")
+            .request(MediaType.TEXT_PLAIN_TYPE)
+            .get();
+
+        response.bufferEntity();
+        assertEquals(0, getLeasedConnections());
+        assertEquals(1, getAvailableConnections());
+
+        assertEquals("foo\n", new String(response.readEntity(byte[].class), "us-ascii"));
+        assertEquals("foo\n", response.readEntity(String.class));
+
+        assertEquals(0, getLeasedConnections());
+        assertEquals(1, getAvailableConnections());
+    }
+
     private static void consume(InputStream in) throws IOException {
         byte[] buffer = new byte[1024];
         for (int readden = in.read(buffer); readden >= 0; readden = in.read(buffer)) {