Added test for ScrambleStrings and formatted folder structure for other folders

String/test/ScrambleStrings.test.js

@@ -0,0 +1,15 @@
+import { isScramble } from '../ScrambleStrings'
+
+describe('ScrambleStrings', () => {
+  it('expects to return true for same string', () => {
+    expect(isScramble('a', 'a')).toBe(true)
+  })
+
+  it('expects to return false for non-scrambled strings', () => {
+    expect(isScramble('abcde', 'caebd')).toBe(false)
+  })
+
+  it('expects to return true for scrambled strings', () => {
+    expect(isScramble('great', 'rgeat')).toBe(true)
+  })
+})