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Copy pathuseFetchCache.test.ts
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63 lines (45 loc) · 1.89 KB
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import { renderHook } from '@testing-library/react';
import { describe, expect, it } from 'vitest';
import { useFetchCache } from './useFetchCache';
describe('useFetchCache', () => {
it('stores and retrieves cached values', () => {
const { result } = renderHook(() => useFetchCache<string>());
result.current.set('key1', 'svg-data');
expect(result.current.get('key1')).toBe('svg-data');
});
it('returns undefined for missing keys', () => {
const { result } = renderHook(() => useFetchCache<string>());
expect(result.current.get('missing')).toBeUndefined();
});
it('reports whether a key exists', () => {
const { result } = renderHook(() => useFetchCache<string>());
result.current.set('key1', 'svg-data');
expect(result.current.has('key1')).toBe(true);
expect(result.current.has('key2')).toBe(false);
});
it('clears all cached values', () => {
const { result } = renderHook(() => useFetchCache<string>());
result.current.set('key1', 'svg-data');
result.current.clear();
expect(result.current.get('key1')).toBeUndefined();
});
it('evicts the oldest entry when cache exceeds 10 items', () => {
const { result } = renderHook(() => useFetchCache<number>());
for (let i = 1; i <= 11; i++) {
result.current.set(`key-${i}`, i);
}
expect(result.current.get('key-1')).toBeUndefined();
expect(result.current.get('key-11')).toBe(11);
});
it('maintains a maximum cache size of 10 entries', () => {
const { result } = renderHook(() => useFetchCache<number>());
for (let i = 1; i <= 15; i++) {
result.current.set(`key-${i}`, i);
}
expect(result.current.get('key-1')).toBeUndefined();
expect(result.current.get('key-2')).toBeUndefined();
expect(result.current.get('key-5')).toBeUndefined();
expect(result.current.get('key-6')).toBe(6);
expect(result.current.get('key-15')).toBe(15);
});
});