Implement sleep sort

Sorts/SleepSort.js

@@ -0,0 +1,25 @@
+/**
+ * Implementation of the sleep sort algorithm.
+ *
+ * This sorting algorithm delays each input element by an amount of time
+ * proportional to its value before adding it to the result
+ *
+ * @see https://rosettacode.org/wiki/Sorting_algorithms/Sleep_sort
+ */
+export function sleepSort(arr) {
+  return new Promise((resolve) => {
+    const result = []
+    let count = 0
+
+    arr.forEach((num) => {
+      // Use setTimeout proportional to the number
+      setTimeout(() => {
+        result.push(num)
+        count++
+        if (count === arr.length) {
+          resolve(result)
+        }
+      }, num)
+    })
+  })
+}

Sorts/test/SleepSort.test.js

@@ -0,0 +1,8 @@
+import { sleepSort } from '../SleepSort.js'
+
+describe('sleepSort', () => {
+  it('should sort the array', async () => {
+    const result = await sleepSort([5, 6, 7, 8, 1, 2, 12, 14])
+    expect(result).toEqual([1, 2, 5, 6, 7, 8, 12, 14])
+  })
+})