/** Unit test to check for regression of [JACKSON-18]. */ public void testSmallNumbers() throws Exception { ObjectMapper mapper = new ObjectMapper(); ArrayNode root = mapper.createArrayNode(); for (int i = -20; i <= 20; ++i) { JsonNode n = root.numberNode(i); root.add(n); // Hmmh. Not sure why toString() won't be triggered otherwise... assertEquals(String.valueOf(i), n.toString()); } // Loop over 2 different serialization methods for (int type = 0; type < 2; ++type) { StringWriter sw = new StringWriter(); if (type == 0) { JsonGenerator gen = new JsonFactory().createGenerator(sw); root.serialize(gen, null); gen.close(); } else { mapper.writeValue(sw, root); } String doc = sw.toString(); JsonParser p = new JsonFactory().createParser(new StringReader(doc)); assertEquals(JsonToken.START_ARRAY, p.nextToken()); for (int i = -20; i <= 20; ++i) { assertEquals(JsonToken.VALUE_NUMBER_INT, p.nextToken()); assertEquals(i, p.getIntValue()); assertEquals("" + i, p.getText()); } assertEquals(JsonToken.END_ARRAY, p.nextToken()); p.close(); } }