feat(test): ✅ add test for binary search

Author: paveda

__tests__/binarySearch.spec.ts

@@ -0,0 +1,19 @@
+import { binarySearch } from '../src/binarySearch';
+import { compareNumbers } from '../src/compareNumbers';
+
+describe('Binary search', () => {
+    it('Search in array of numbers', () => {
+        const ARRAY = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9];
+        const SEARCH_ELEMENT = 3;
+        const EXPECTED_INDEX = 3;
+
+        expect(binarySearch(ARRAY, SEARCH_ELEMENT, compareNumbers)).toBe(EXPECTED_INDEX);
+    })
+    it('Search near index', () => {
+        const ARRAY = [0, 1, 2, 4, 5, 6, 7, 8, 9];
+        const SEARCH_ELEMENT = 3;
+        const EXPECTED_INDEX = 3;
+
+        expect(binarySearch(ARRAY, SEARCH_ELEMENT, compareNumbers, true)).toBe(EXPECTED_INDEX);
+    })
+})