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import { deepMerge, isObject, sleep } from '@shared/lib/utils'; |
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describe('isObject', () => { |
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it('returns true for plain objects', () => { |
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expect(isObject({})).toBe(true); |
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expect(isObject({ a: 1 })).toBe(true); |
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}); |
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it('returns false for arrays', () => { |
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expect(isObject([])).toBe(false); |
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}); |
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it('returns false for null', () => { |
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expect(isObject(null)).toBe(false); |
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}); |
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it('returns false for other types', () => { |
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expect(isObject(42)).toBe(false); |
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expect(isObject('string')).toBe(false); |
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expect(isObject(undefined)).toBe(false); |
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}); |
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}); |
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describe('deepMerge', () => { |
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it('merges two flat objects', () => { |
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const result = deepMerge({ a: 1 }, { b: 2 }); |
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expect(result).toEqual({ a: 1, b: 2 }); |
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}); |
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it('merges deeply nested objects', () => { |
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const result = deepMerge({ a: { x: 1 }, b: 2 }, { a: { y: 3 }, c: 4 }); |
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expect(result).toEqual({ a: { x: 1, y: 3 }, b: 2, c: 4 }); |
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}); |
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it('overwrites non-object values', () => { |
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const result = deepMerge({ a: 1 }, { a: 2 }); |
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expect(result).toEqual({ a: 2 }); |
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}); |
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it('returns null if any input is not an object', () => { |
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expect(deepMerge(null, { a: 1 })).toBeNull(); |
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expect(deepMerge({ a: 1 }, 123)).toBeNull(); |
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}); |
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}); |
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describe('sleep', () => { |
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it('resolves after given time', async () => { |
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const start = Date.now(); |
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await sleep(50); |
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const duration = Date.now() - start; |
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// Note: setTimeout can fire slightly early due to timer coalescing, |
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// so we allow some buffer in the assertion |
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expect(duration).toBeGreaterThanOrEqual(47); |
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}); |
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}); |
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