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38 lines
978 B
38 lines
978 B
7 years ago
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'use strict';
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const infiniteList = require('../index');
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/* global describe it expect */
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describe("InfiniteList", () => {
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it("Should be 0", () => {
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const infinite = infiniteList.create(0, x => x + 2);
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expect(infinite.first().value).toBe(0);
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})
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it("Should be 22", () => {
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const infinite = infiniteList.create(0, x => x + 2);
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expect(infinite.get(11).value).toBe(22);
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})
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it("Should be [ 0, 2, 4, 6, 8 ]", () => {
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const infinite = infiniteList.create(0, x => x + 2);
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expect(infinite.take(5).map(x => x.value)).toEqual([ 0, 2, 4, 6, 8 ]);
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})
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it("Should be [ 16, 18, 20 ]", () => {
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const infinite = infiniteList.create(0, x => x + 2);
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expect(infinite.take(8, 10).map(x => x.value)).toEqual([ 16, 18, 20 ]);
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})
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it("Should be [ 0, 2, 4, 6, 8 ]", () => {
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const infinite = infiniteList.create(0, x => x + 2);
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const acc = [];
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for(let i of infinite) {
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if(i.index >= 5) break;
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acc.push(i.value)
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}
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expect(acc).toEqual([ 0, 2, 4, 6, 8 ]);
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})
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})
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