Implementing NSFileManager.homeDirectoryForCurrentUser and homeDirectory(forUser userName: ) (#860)

Author: saiHemak

Foundation/NSFileManager.swift

@@ -712,9 +712,15 @@ extension FileManager {
 }
 
 extension FileManager {
-    open var homeDirectoryForCurrentUser: URL { NSUnimplemented() }
+    open var homeDirectoryForCurrentUser: URL {
+        return homeDirectory(forUser: CFCopyUserName().takeRetainedValue()._swiftObject)!
+    }
     open var temporaryDirectory: URL { NSUnimplemented() }
-    open func homeDirectory(forUser userName: String) -> URL? { NSUnimplemented() }
+    open func homeDirectory(forUser userName: String) -> URL? {
+        guard !userName.isEmpty else { return nil }
+        guard let url = CFCopyHomeDirectoryURLForUser(userName._cfObject) else { return nil }
+        return  url.takeRetainedValue()._swiftObject
+    }
 }
 
 extension FileManager {

TestFoundation/TestNSFileManager.swift

@@ -29,7 +29,8 @@ class TestNSFileManager : XCTestCase {
             ("test_pathEnumerator",test_pathEnumerator),
             ("test_contentsOfDirectoryAtPath", test_contentsOfDirectoryAtPath),
             ("test_subpathsOfDirectoryAtPath", test_subpathsOfDirectoryAtPath),
-            ("test_copyItemAtPathToPath", test_copyItemAtPathToPath)
+            ("test_copyItemAtPathToPath", test_copyItemAtPathToPath),
+            ("test_homedirectoryForUser", test_homedirectoryForUser),
         ]
     }
 
@@ -474,4 +475,11 @@ class TestNSFileManager : XCTestCase {
         }
         XCTFail("Copy overwrites a file/folder that already exists")
     }
+    
+    func test_homedirectoryForUser() {
+        let filemanger = FileManager.default
+        XCTAssertNil(filemanger.homeDirectory(forUser: "someuser"))
+        XCTAssertNil(filemanger.homeDirectory(forUser: ""))
+        XCTAssertNotNil(filemanger.homeDirectoryForCurrentUser)
+    }
 }