add task solution

src/arrayReverse.test.js

@@ -1,4 +1,5 @@
 'use strict';
+/* eslint-disable max-len */
 
 describe(`Function 'arrayReverse':`, () => {
   const arrayReverse = require('./arrayReverse');
@@ -8,13 +9,54 @@ describe(`Function 'arrayReverse':`, () => {
   });
 
   it(`should return an array`, () => {
+    const res = arrayReverse(['a']);
 
+    expect(res).toBeInstanceOf(Array);
+  });
+
+  it('should return an empty array if the original one is empty', () => {
+    const array = [];
+    const res = [];
+
+    expect(arrayReverse(array)).toEqual(res);
+  });
+
+  it(`should reverse an array
+    of the words consists of Latin letters,
+    numbers and special symbols`, () => {
+    const array1 = ['Mate', 'Academy'];
+    const res1 = ['ymed', 'acAetaM'];
+    const array2 = ['1,2,', '22!'];
+    const res2 = ['!22,', '2,1'];
+    const array3 = ['QWErty', '#$%~^'];
+    const res3 = ['^~%$#y', 'trEWQ'];
+    const array4 = ['Hell0'];
+    const res4 = ['0lleH'];
+
+    expect(arrayReverse(array1)).toEqual(res1);
+    expect(arrayReverse(array2)).toEqual(res2);
+    expect(arrayReverse(array3)).toEqual(res3);
+    expect(arrayReverse(array4)).toEqual(res4);
+  });
+
+  it(`should keep the length of the strings from the original array`, () => {
+    const array1 = ['1', '22', '333', '4444'];
+    const res1 = ['4', '44', '433', '3221'];
+    const array2 = ['I', 'am', 'a', 'student!'];
+    const res2 = ['!', 'tn', 'e', 'dutsamaI'];
+
+    expect(arrayReverse(array1)).toEqual(res1);
+    expect(arrayReverse(array2)).toEqual(res2);
   });
 
   it(`should return an empty string
     if original array consists of an empty string`, () => {
-    expect(arrayReverse(['Mate', 'Academy'])).toEqual(['ymed', 'acAetaM']);
-  });
+    const array1 = ['', 'Mate', '', 'academy'];
+    const array2 = ['', '', ''];
+    const res1 = ['', 'ymed', '', 'acaetaM'];
+    const res2 = ['', '', ''];
 
-  // write more tests here
+    expect(arrayReverse(array1)).toEqual(res1);
+    expect(arrayReverse(array2)).toEqual(res2);
+  });
 });