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Review Summary
Great work on this test suite! The tests are well-organized and cover most scenarios effectively. However, one critical change is needed. Your test in src/reduce.test.js for calling reduce on an empty array without an initial value expects undefined. The native Array.prototype.reduce method is required to throw a TypeError in this specific case. Please update your test to assert that a TypeError is thrown. You can accomplish this in Jest using expect(() => yourFunction()).toThrow(TypeError);.
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Footnotes
src/reduce.test.js
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| it('should handle empty array', () => { | ||
| const actual = [].reduce2(mockReducer); | ||
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| expect(mockReducer).toHaveBeenCalledTimes(0); | ||
| expect(actual).toBeUndefined(); | ||
| }); |
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This test case doesn't align with the native Array.prototype.reduce behavior. When reduce is called on an empty array without an initial value, it should throw a TypeError. Your test should assert that an error is thrown, not that the result is undefined.
You can use expect(() => ...).toThrow(TypeError) to test for this.
mateacademy-ai-mentor
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Review Summary
Excellent work on this update! I'm happy to approve your changes. You've successfully addressed the feedback from the last review, and the test case for an empty array without an initial value now correctly asserts that a TypeError is thrown. Your implementation of reduce now perfectly mirrors the native method's behavior, and the test suite is comprehensive and robust. Keep up the great work!
✨ Please rate this review in the Platform's notification center1. I will be grateful for your feedback! ✨
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