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test: add unit tests for arrayReverse #197

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test: add unit tests for arrayReverse #197

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26 changes: 21 additions & 5 deletions src/arrayReverse.test.js
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Original file line number Diff line number Diff line change
Expand Up @@ -7,12 +7,28 @@ describe(`Function 'arrayReverse':`, () => {
expect(arrayReverse).toBeInstanceOf(Function);
});

it(`should return an array`, () => {});
it(`returns an array`, () => {
expect(arrayReverse([''])).toBeInstanceOf(Array);
});

it(`should return an empty string
if original array consists of an empty string`, () => {
expect(arrayReverse(['Mate', 'Academy'])).toEqual(['ymed', 'acAetaM']);
it(`returns an empty string inside array for an empty string input`, () => {
expect(arrayReverse([''])).toEqual(['']);
});

it(`reverses characters in a single-word array`, () => {
expect(arrayReverse(['Hello'])).toEqual(['olleH']);
});

// write more tests here
it(`reverses and restructures multi-element arrays`, () => {
expect(arrayReverse(['I', 'am', 'a', 'student!'])).toEqual([
'!',
'tn',
'e',
'dutsamaI',
]);
});

it(`reverses and splits phrases correctly`, () => {
expect(arrayReverse(['Mate', 'Academy'])).toEqual(['ymed', 'acAetaM']);
});
});
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