Solution

src/arrayReverse.test.js

@@ -1,18 +1,62 @@
 'use strict';
 
-describe(`Function 'arrayReverse':`, () => {
-  const arrayReverse = require('./arrayReverse');
+const arrayReverse = require('./arrayReverse');
 
+describe(`Function 'arrayReverse':`, () => {
   it(`should be declared`, () => {
     expect(arrayReverse).toBeInstanceOf(Function);
   });
 
-  it(`should return an array`, () => {});
+  it.each([[['Mate', 'Academy']], [[]], [['Hello!', '123', 'test_case']]])(
+    `should return an array`,
+    (input) => {
+      const result = arrayReverse(input);
+
+      expect(Array.isArray(result)).toBe(true);
+    },
+  );
 
-  it(`should return an empty string
-    if original array consists of an empty string`, () => {
+  it(`should return reversed input`, () => {
     expect(arrayReverse(['Mate', 'Academy'])).toEqual(['ymed', 'acAetaM']);
   });
 
   // write more tests here
+  it(`should return reversed input`, () => {
+    expect(arrayReverse(["What's", 'good,', 'my', 'Dear', 'Mate'])).toEqual([
+      'etaMra',
+      'eDym,',
+      'do',
+      "ogs'",
+      'tahW',
+    ]);
+  });
+
+  it.each([
+    [[]],
+    [['Abc', 'Defg', 'Hijkl', 'Mnopqr']],
+    [['The quick brown fox jumps over the lazy dog']],
+  ])(`should return a value with the same length as the input`, (input) => {
+    const result = arrayReverse(input);
+
+    expect(result.length).toEqual(input.length);
+  });
+
+  it(`should return an empty string if original array consists of an empty string`, () => {
+    expect(arrayReverse([''])).toEqual(['']);
+  });
+
+  it.each([
+    [['Hello!', '123', 'test_case', 'a b c']],
+    [['#JS2024', '', 'multi word', "don't", ' ']],
+    [['  spacje  ', 'CamelCase', '42!', 'ąęół']],
+  ])(
+    `should return an array of values with the same length as input values`,
+    (input) => {
+      const result = arrayReverse(input);
+
+      result.forEach((element, index) => {
+        expect(element.length).toBe(input[index].length);
+      });
+    },
+  );
 });