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__tests__/get.ts
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Julien Deniau
Better TypeScript configuration for jest
29 мар 2025, 01:47
29 мар 2025, 01:47
992f37c
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import { describe, expect, it } from '@jest/globals'; import { Range } from 'immutable'; describe('get', () => { it('gets any index', () => { const seq = Range(0, 100); expect(seq.get(20)).toBe(20); }); it('gets first', () => { const seq = Range(0, 100); expect(seq.first()).toBe(0); }); it('gets last', () => { const seq = Range(0, 100); expect(seq.last()).toBe(99); }); it('gets any index after reversing', () => { const seq = Range(0, 100).reverse(); expect(seq.get(20)).toBe(79); }); it('gets first after reversing', () => { const seq = Range(0, 100).reverse(); expect(seq.first()).toBe(99); }); it('gets last after reversing', () => { const seq = Range(0, 100).reverse(); expect(seq.last()).toBe(0); }); it('gets any index when size is unknown', () => { const seq = Range(0, 100).filter((x) => x % 2 === 1); expect(seq.get(20)).toBe(41); }); it('gets first when size is unknown', () => { const seq = Range(0, 100).filter((x) => x % 2 === 1); expect(seq.first()).toBe(1); }); it('gets last when size is unknown', () => { const seq = Range(0, 100).filter((x) => x % 2 === 1); expect(seq.last()).toBe(99); // Note: this is O(N) }); });