Test iOS, tvOS & watchOS

Sources/TemporaryDirectory.swift

@@ -4,17 +4,40 @@ public class TemporaryDirectory {
     public let url: URL
     public var path: Path { return Path(string: url.path) }
 
-    public init() throws {
-    #if !os(Linux)
-        url = try FileManager.default.url(for: .itemReplacementDirectory, in: .userDomainMask, appropriateFor: URL(fileURLWithPath: "/"), create: true)
-    #else
+    /**
+     Creates a new temporary directory.
+
+     The directory is recursively deleted when this object deallocates.
+
+     If you need a temporary directory on a specific volume use the `appropriateFor`
+     parameter.
+
+     - Important: If you are moving a file, ensure to use the `appropriateFor`
+     parameter, since it is volume aware and moving the file across volumes will take
+     exponentially longer!
+     - Important: The `appropriateFor` parameter does not work on Linux.
+     - Parameter appropriateFor: The temporary directory will be located on this
+     volume.
+    */
+    public init(appropriateFor: URL? = nil) throws {
+      #if !os(Linux)
+        let appropriate: URL
+        if let appropriateFor = appropriateFor {
+            appropriate = appropriateFor
+        } else if #available(OSX 10.12, iOS 10, tvOS 10, watchOS 3, *) {
+            appropriate = FileManager.default.temporaryDirectory
+        } else {
+            appropriate = URL(fileURLWithPath: NSTemporaryDirectory())
+        }
+        url = try FileManager.default.url(for: .itemReplacementDirectory, in: .userDomainMask, appropriateFor: appropriate, create: true)
+      #else
         let envs = ProcessInfo.processInfo.environment
         let env = envs["TMPDIR"] ?? envs["TEMP"] ?? envs["TMP"] ?? "/tmp"
         let dir = Path.root/env/"swift-sh.XXXXXX"
         var template = [UInt8](dir.string.utf8).map({ Int8($0) }) + [Int8(0)]
         guard mkdtemp(&template) != nil else { throw CocoaError.error(.featureUnsupported) }
         url = URL(fileURLWithPath: String(cString: template))
-    #endif
+      #endif
     }
 
     deinit {