[REFACTOR] [Hacker Rank] Interview Preparation Kit: Arrays: Minimum Swaps 2.

* TEST data moved to JSON.
* Adjusted the interface to match what hackerrank expects.

Author: Gonzalo Diaz

src/hackerrank/interview_preparation_kit/arrays/minimum_swaps_2.js

@@ -2,7 +2,7 @@
  * @link Problem definition [[docs/hackerrank/interview_preparation_kit/arrays/minimum_swaps_2.md]]
  */
 
-export function minimumSwaps(arr) {
+function minimumSwaps(arr) {
   const indexedGroup = arr.map((x) => x - 1);
   let swaps = 0;
   let index = 0;
@@ -23,3 +23,4 @@ export function minimumSwaps(arr) {
 }
 
 export default { minimumSwaps };
+export { minimumSwaps };

src/hackerrank/interview_preparation_kit/arrays/minimum_swaps_2.test.js

@@ -3,11 +3,7 @@ import { logger as console } from '../../../logger.js';
 
 import { minimumSwaps } from './minimum_swaps_2.js';
 
-const TEST_CASES = [
-  { title: 'Sample input 0', input: [4, 3, 1, 2], expected: 3 },
-  { title: 'Sample input 1', input: [2, 3, 4, 1, 5], expected: 3 },
-  { title: 'Sample input 2', input: [1, 3, 5, 2, 4, 6, 7], expected: 3 }
-];
+import TEST_CASES from './minimum_swaps_2.testcases.json';
 
 describe('minimum swaps 2', () => {
   it('minimumSwaps', () => {

src/hackerrank/interview_preparation_kit/arrays/minimum_swaps_2.testcases.json

@@ -0,0 +1,5 @@
+[
+    {"title": "Sample input 0", "input": [4, 3, 1, 2], "expected": 3},
+    {"title": "Sample input 1", "input": [2, 3, 4, 1, 5], "expected": 3},
+    {"title": "Sample input 2", "input": [1, 3, 5, 2, 4, 6, 7], "expected": 3}
+]