### Question:
DefaultJsonFieldDecoder implements JsonFieldDecoder { @Override public FieldValueProvider decode(JsonNode value) { return new JsonValueProvider(value, columnHandle, minValue, maxValue); } DefaultJsonFieldDecoder(DecoderColumnHandle columnHandle); @Override FieldValueProvider decode(JsonNode value);  }### Answer:
@Test public void testDecode() { tester.assertDecodedAs("0.5", DOUBLE, 0.5); tester.assertDecodedAs("-0.5", DOUBLE, -0.5); tester.assertDecodedAs("10", DOUBLE, 10.0); tester.assertDecodedAs("0", DOUBLE, 0.0); tester.assertDecodedAs("\"0.4\"", DOUBLE, 0.4); tester.assertDecodedAs("" + Byte.MIN_VALUE, TINYINT, Byte.MIN_VALUE); tester.assertDecodedAs("" + Byte.MAX_VALUE, TINYINT, Byte.MAX_VALUE); tester.assertDecodedAs("0", TINYINT, 0); tester.assertDecodedAs("\"10\"", TINYINT, 10); assertCouldNotParse("" + (Byte.MIN_VALUE - 1), TINYINT); assertCouldNotParse("" + (Byte.MAX_VALUE + 1), TINYINT); tester.assertDecodedAs("" + Short.MIN_VALUE, SMALLINT, Short.MIN_VALUE); tester.assertDecodedAs("" + Short.MAX_VALUE, SMALLINT, Short.MAX_VALUE); tester.assertDecodedAs("0", SMALLINT, 0); tester.assertDecodedAs("\"1000\"", SMALLINT, 1000); assertCouldNotParse("" + (Short.MIN_VALUE - 1), SMALLINT); assertCouldNotParse("" + (Short.MAX_VALUE + 1), SMALLINT); tester.assertDecodedAs("" + Integer.MIN_VALUE, INTEGER, Integer.MIN_VALUE); tester.assertDecodedAs("" + Integer.MAX_VALUE, INTEGER, Integer.MAX_VALUE); tester.assertDecodedAs("0", INTEGER, 0); tester.assertDecodedAs("\"1000\"", INTEGER, 1000); assertCouldNotParse("" + (Integer.MIN_VALUE - 1L), INTEGER); assertCouldNotParse("" + (Integer.MAX_VALUE + 1L), INTEGER); tester.assertDecodedAs("" + Long.MIN_VALUE, BIGINT, Long.MIN_VALUE); tester.assertDecodedAs("" + Long.MAX_VALUE, BIGINT, Long.MAX_VALUE); tester.assertDecodedAs("0", BIGINT, 0); tester.assertDecodedAs("\"1000\"", BIGINT, 1000); assertCouldNotParse("" + (BigInteger.valueOf(Long.MIN_VALUE).subtract(BigInteger.ONE)), BIGINT); assertCouldNotParse("" + (BigInteger.valueOf(Long.MAX_VALUE).add(BigInteger.ONE)), BIGINT); tester.assertDecodedAs("false", BOOLEAN, false); tester.assertDecodedAs("true", BOOLEAN, true); tester.assertDecodedAs("\"false\"", BOOLEAN, false); tester.assertDecodedAs("\"true\"", BOOLEAN, true); tester.assertDecodedAs("\"blah\"", BOOLEAN, false); tester.assertDecodedAs("0", BOOLEAN, false); tester.assertDecodedAs("1", BOOLEAN, true); tester.assertDecodedAs("10", BOOLEAN, true); tester.assertDecodedAs("\"0\"", BOOLEAN, false); tester.assertDecodedAs("\"1\"", BOOLEAN, false); }