add more tests (#26)

* added more tests

* (fix) no cpu profile.

__tests__/functions/CountOccurences.js

@@ -1,6 +1,4 @@
-const {
-  CountOccurences
-} = require('../../functions/CountOccurences');
+const { CountOccurences } = require('../../functions/CountOccurences');
 test('Counting Occurences', () => {
-  expect(CountOccurences([1, 2, 3, 4, 1], 1)).toBe(2);
-});
+    expect(CountOccurences([1, 2, 3, 4, 1], 1)).toBe(2);
+});