[GROOVY-7665] JsonSlurperCharSource decimal parsing producing unexpected results

• Type: Bug
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 2.4.5
• Fix Version/s: 2.4.6
• Component/s: JSON
• Assignee: Pascal Schumacher
• Reporter: John Wagenleitner
• Created: 09/Nov/15 21:05
• Updated: 22/Feb/16 20:48
• Resolved: 09/Nov/15 22:19

Description

When using the JsonParserType.CHARACTER_SOURCE decimal numbers are first parsed to double value and that value is used to construct the BigDecimal to return. This can produce some unexpected results.

For example:

​import groovy.json.*

def parser = new JsonSlurper().setType(JsonParserType.CHARACTER_SOURCE)
def json = parser.parseText('{"num": 123.40}')

assert json.num instanceof BigDecimal
assert 123.40G == json.num​

Fails with:

Assertion failed: 

assert 123.40G == json.num
               |  |    |
               |  |    123.400000000000005684341886080801486968994140625
               |  [num:123.400000000000005684341886080801486968994140625]
               false

	at Script1.run(Script1.groovy:8)