Done the changes as per the comments

Author: “saiHemak”

Foundation/NSBundle.swift

@@ -77,19 +77,19 @@ public class Bundle: NSObject {
     public func unload() -> Bool { NSUnimplemented() }
 
     public func preflight() throws {
-        var unmangaedError:Unmanaged<CFError>? = nil
-        try withUnsafeMutablePointer(&unmangaedError) { (unmanagedCFError: UnsafeMutablePointer<Unmanaged<CFError>?>)  in
-            CFBundlePreflightExecutable(_bundle,  unmanagedCFError)
+        var unmanagedError:Unmanaged<CFError>? = nil
+        try withUnsafeMutablePointer(&unmanagedError) { (unmanagedCFError: UnsafeMutablePointer<Unmanaged<CFError>?>)  in
+            CFBundlePreflightExecutable(_bundle, unmanagedCFError)
             if let error = unmanagedCFError.pointee {
                 throw   error.takeRetainedValue()._nsObject
             }
         }
     }
 
     public func loadAndReturnError() throws {
-        var unmangaedError:Unmanaged<CFError>? = nil
-        try  withUnsafeMutablePointer(&unmangaedError) { (unmanagedCFError: UnsafeMutablePointer<Unmanaged<CFError>?>)  in
-            CFBundleLoadExecutableAndReturnError(_bundle,  unmanagedCFError)
+        var unmanagedError:Unmanaged<CFError>? = nil
+        try  withUnsafeMutablePointer(&unmanagedError) { (unmanagedCFError: UnsafeMutablePointer<Unmanaged<CFError>?>)  in
+            CFBundleLoadExecutableAndReturnError(_bundle, unmanagedCFError)
             if let error = unmanagedCFError.pointee {
                 let retainedValue = error.takeRetainedValue()
                 throw  retainedValue._nsObject

TestFoundation/TestNSBundle.swift

@@ -29,10 +29,9 @@ class TestNSBundle : XCTestCase {
             ("test_localizations", test_localizations),
             ("test_URLsForResourcesWithExtension", test_URLsForResourcesWithExtension),
             ("test_bundleLoad", test_bundleLoad),
-            ("test_bundleLoadWithError",test_bundleLoadWithError),
-            ("test_bundleWithInvalidPath",test_bundleWithInvalidPath),
-            ("test_bundlePreflight",test_bundlePreflight),
-
+            ("test_bundleLoadWithError", test_bundleLoadWithError),
+            ("test_bundleWithInvalidPath", test_bundleWithInvalidPath),
+            ("test_bundlePreflight", test_bundlePreflight),
         ]
     }
 
@@ -165,7 +164,7 @@ class TestNSBundle : XCTestCase {
     }
 
     func test_bundleLoadWithError(){
-        let bundleValid = NSBundle.mainBundle()
+        let bundleValid = Bundle.main()
         //test valid load using loadAndReturnError
         do{
             try bundleValid.loadAndReturnError()
@@ -174,26 +173,26 @@ class TestNSBundle : XCTestCase {
         }
         // executable cannot be located
         guard let playground = _setupPlayground() else { XCTFail("Unable to create playground"); return }
-        let bundle = NSBundle(path: playground + _bundleName)
+        let bundle = Bundle(path: playground + _bundleName)
         XCTAssertThrowsError(try bundle!.loadAndReturnError())
         _cleanupPlayground(playground)
     }
 
     func test_bundleWithInvalidPath(){
-        let bundleInvalid = NSBundle(path: "/tmp/test.playground")
+        let bundleInvalid = Bundle(path: "/tmp/test.playground")
         XCTAssertNil(bundleInvalid)
     }
 
     func test_bundlePreflight(){
-        let bundleValid = NSBundle.mainBundle()
+        let bundleValid = Bundle.main()
         do{
             try bundleValid.preflight()
         }catch{
             XCTFail("should not fail to load")
         }
         // executable cannot be located ..preflight should report error
         guard let playground = _setupPlayground() else { XCTFail("Unable to create playground"); return }
-        let bundle = NSBundle(path: playground + _bundleName)
+        let bundle = Bundle(path: playground + _bundleName)
         XCTAssertThrowsError(try bundle!.preflight())
         _cleanupPlayground(playground)
     }