Fixes for Swift 4.2 on Linux (#43)

* Use same test as OSX, as issue IBM-Swift/SwiftRuntime#183 appears fixed in swift 4.2 on linux

* Use a String for the key in the json rather than an Int. Using an Int causes failure in Linux with swift 4.2. Surely all json keys are Strings anyway?

* Trap Int before Doubles before Bools in setPObjectHelper otherwise swift4.2 on linux can interpret Ints as Doubles and Bools as Ints

* Reinstate linux swift 4.2 build on travis

Author: sportlabsMike

.travis.yml

@@ -12,11 +12,10 @@ matrix:
       dist: trusty
       sudo: required
       env: SWIFT_SNAPSHOT=4.0.3
-# Tests fail on Swift 4.2 on Linux.
-#    - os: linux
-#      dist: trusty
-#      sudo: required
-#      env: DOCKER_IMAGE=ubuntu:16.04 SWIFT_SNAPSHOT=4.2.1
+    - os: linux
+      dist: trusty
+      sudo: required
+      env: DOCKER_IMAGE=ubuntu:16.04 SWIFT_SNAPSHOT=4.2.1
 #    - os: linux
 #      dist: trusty
 #      sudo: required

Package@swift-4.2.swift

@@ -0,0 +1,43 @@
+// swift-tools-version:4.2
+// The swift-tools-version declares the minimum version of Swift required to build this package.
+/**
+ * Copyright IBM Corporation 2016, 2017
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ **/
+
+import PackageDescription
+
+let package = Package(
+    name: "SwiftyJSON",
+    products: [
+        // Products define the executables and libraries produced by a package, and make them visible to other packages.
+        .library(
+            name: "SwiftyJSON",
+            targets: ["SwiftyJSON"]
+        )
+    ],
+    dependencies: [],
+    targets: [
+        // Targets are the basic building blocks of a package. A target can define a module or a test suite.
+        // Targets can depend on other targets in this package, and on products in packages which this package depends on.
+        .target(
+            name: "SwiftyJSON",
+            dependencies: []
+        ),
+        .testTarget(
+            name: "SwiftyJSONTests",
+            dependencies: ["SwiftyJSON"]
+        )
+    ]
+)

Sources/SwiftyJSON/SwiftyJSON.swift

@@ -237,7 +237,13 @@ public struct JSON {
     var type: Type
     var value: Any
 
-    if let bool = newValue as? Bool {
+    if let number = newValue as? Int {
+        type = .number
+        value = NSNumber(value: number)
+    } else if let number = newValue as? Double {
+        type = .number
+        value = NSNumber(value: number)
+    } else if let bool = newValue as? Bool {
     type = .bool
     value = bool
     } else if let number = newValue as? NSNumber {
@@ -248,13 +254,7 @@ public struct JSON {
     type = .number
     value = number
     }
-    } else if let number = newValue as? Double {
-    type = .number
-    value = NSNumber(value: number)
-    } else if let number = newValue as? Int {
-    type = .number
-    value = NSNumber(value: number)
-    } else if let string = newValue as? String {
+    } else  if let string = newValue as? String {
     type = .string
     value = string
     } else if let string = newValue as? NSString {

Tests/SwiftyJSONTests/LiteralConvertibleTests.swift

@@ -70,7 +70,7 @@ class LiteralConvertibleTests: XCTestCase {
         XCTAssert(jsonNil_1 == nil)
         let jsonNil_2:JSON = JSON(NSNull.self)
         XCTAssert(jsonNil_2 != nil)
-        let jsonNil_3:JSON = JSON([1:2])
+        let jsonNil_3:JSON = JSON(["1":2])
         XCTAssert(jsonNil_3 != nil)
     }
 

Tests/SwiftyJSONTests/NumberTests.swift

@@ -55,7 +55,7 @@ class NumberTests: XCTestCase {
         XCTAssertEqual(json.numberValue, 9876543210.123456789)
         // Number of fraction digits differs on OSX and Linux,
         // issue https://github.com/IBM-Swift/SwiftRuntime/issues/183
-        #if os(Linux)
+        #if (os(Linux) && !swift(>=4.2))
             XCTAssertEqual(json.stringValue, "9876543210.12346")
         #else
             XCTAssertEqual(json.stringValue, "9876543210.123457")
@@ -128,7 +128,7 @@ class NumberTests: XCTestCase {
         XCTAssertEqual(json.numberValue, 9876543210.123456789)
         // Number of fraction digits differs on OSX and Linux,
         // issue https://github.com/IBM-Swift/SwiftRuntime/issues/183
-        #if os(Linux)
+        #if (os(Linux) && !swift(>=4.2))
             XCTAssertEqual(json.stringValue, "9876543210.12346")
         #else
             XCTAssertEqual(json.stringValue, "9876543210.123457")

Tests/SwiftyJSONTests/PrintableTests.swift

@@ -43,7 +43,7 @@ class PrintableTests: XCTestCase {
         let json:JSON = 1234567890.876623
         // Number of fraction digits differs on OSX and Linux,
         // issue https://github.com/IBM-Swift/SwiftRuntime/issues/183
-        #if os(Linux)
+        #if (os(Linux) && !swift(>=4.2))
             XCTAssertEqual(json.description, "1234567890.87662")
             XCTAssertEqual(json.debugDescription, "1234567890.87662")
         #else