[swift-corelibs-dev] Strange behavior the same code fails when building a Cocoa CLI and succeeds in Swift-corelibs-foundation context.

[Benoit Pereira da silva]

Dear All,


I do encounter a very strange Issue.

I have been adding a test to `swift-corelibs-foundation/testJSONSerialization.swift`
This test succeed within swift-corelibs-foundation test, but fails when repackaged to a Cocoa CLI app.

The  swift-corelibs-foundation test : 


    func test_serializeFloatingPointWithANonDotDecimalSeparatorLocale() {
        // We use a locale that is using "," as decimal separator.
        setlocale(LC_ALL,"fr_FR")

        let dictionary = ["decimalValue":1.1]
        do{
            let data = try JSONSerialization.data(withJSONObject: dictionary)
            if let json =  String(data:data, encoding:.utf8){
                XCTAssert(!json.contains(","), "Expected result: \"{\"decimalValue\":1.1000000000000001}\" found: \"\(json)\"" )
            }else{
                XCTFail("Failed during string encoding")
            }
        }catch{
            XCTFail("Failed during serialization")
        }
    }


The simple CLI code that proves the bug (https://bugs.swift.org/browse/SR-6631 <https://bugs.swift.org/browse/SR-6631>)

//
//  main.swift
//  doubleEncoding
//
//  Created by Benoit Pereira da silva on 02/12/2017.
//  Copyright © 2017 Pereira da Silva. All rights reserved.
//

import Foundation

// Let's set to french
setlocale(LC_ALL,"fr_FR")

do{
    let dictionary = ["decimalValue":1.1]
    let data = try JSONSerialization.data(withJSONObject: dictionary)
    if let json =  String(data:data, encoding:.utf8){
        // the result is : "{"decimalValue":1,1000000000000001}"
        // The decimal separator should not be "," but "."
        print(json)
    }
}catch{
    print("\(error)")
}



Any idea ?
I do use Toolchain: Swift Development Snapshot 2017-12-17 (a)


Benoit



Benoit Pereira da Silva
Ultra Mobile Developer & Movement Activist
Développeur Ultra Mobile & Militant du mouvement
https://pereira-da-silva.com <https://pereira-da-silva.com/>





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