Add tasks for all the new languages

Task/Test-a-function/Swift/test-a-function.swift

@@ -0,0 +1,32 @@
+import Cocoa
+import XCTest
+
+class PalindromTests: XCTestCase {
+
+    override func setUp() {
+        super.setUp()
+
+    }
+
+    override func tearDown() {
+        super.tearDown()
+    }
+
+    func testPalindrome() {
+        // This is an example of a functional test case.
+        XCTAssert(isPalindrome("abcba"), "Pass")
+        XCTAssert(isPalindrome("aa"), "Pass")
+        XCTAssert(isPalindrome("a"), "Pass")
+        XCTAssert(isPalindrome(""), "Pass")
+        XCTAssert(isPalindrome("ab"), "Pass") // Fail
+        XCTAssert(isPalindrome("aa"), "Pass")
+        XCTAssert(isPalindrome("abcdba"), "Pass") // Fail
+    }
+
+    func testPalindromePerformance() {
+        // This is an example of a performance test case.
+        self.measureBlock() {
+            var _is = isPalindrome("abcba")
+        }
+    }
+}