79 lines
2.6 KiB
JavaScript
79 lines
2.6 KiB
JavaScript
import { totalBirdCount, birdsInWeek, fixBirdCountLog } from './bird-watcher';
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describe('totalBirdCount', () => {
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test('calculates the correct total number of birds', () => {
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const birdsPerDay = [9, 0, 8, 4, 5, 1, 3];
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expect(totalBirdCount(birdsPerDay)).toBe(30);
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});
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test('works for a short bird count list', () => {
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const birdsPerDay = [2];
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expect(totalBirdCount(birdsPerDay)).toBe(2);
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});
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test('works for a long bird count list', () => {
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// prettier-ignore
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const birdsPerDay = [2, 8, 4, 1, 3, 5, 0, 4, 1, 6, 0, 3, 0, 1, 5, 4, 1, 1, 2, 6];
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expect(totalBirdCount(birdsPerDay)).toBe(57);
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});
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});
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describe('birdsInWeek', () => {
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test('calculates the number of birds in the first week', () => {
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const birdsPerDay = [3, 0, 5, 1, 0, 4, 1, 0, 3, 4, 3, 0, 8, 0];
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expect(birdsInWeek(birdsPerDay, 1)).toBe(14);
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});
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test('calculates the number of birds for a week in the middle of the log', () => {
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// prettier-ignore
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const birdsPerDay = [4, 7, 3, 2, 1, 1, 2, 0, 2, 3, 2, 7, 1, 3, 0, 6, 5, 3, 7, 2, 3];
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expect(birdsInWeek(birdsPerDay, 2)).toBe(18);
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});
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test('works when there is only one week', () => {
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const birdsPerDay = [3, 0, 3, 3, 2, 1, 0];
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expect(birdsInWeek(birdsPerDay, 1)).toBe(12);
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});
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test('works for a long bird count list', () => {
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const week21 = [2, 0, 1, 4, 1, 3, 0];
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const birdsPerDay = randomArray(20 * 7)
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.concat(week21)
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.concat(randomArray(10 * 7));
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expect(birdsInWeek(birdsPerDay, 21)).toBe(11);
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});
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});
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describe('fixBirdCountLog', () => {
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test('returns a bird count list with the corrected values', () => {
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const birdsPerDay = [3, 0, 5, 1, 0, 4, 1, 0, 3, 4, 3, 0];
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const expected = [4, 0, 6, 1, 1, 4, 2, 0, 4, 4, 4, 0];
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expect(fixBirdCountLog(birdsPerDay)).toEqual(expected);
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});
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test('does not create a new array', () => {
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const birdsPerDay = [2, 0, 1, 4, 1, 3, 0];
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// This checks that the same object that was passed in is returned.
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// https://jestjs.io/docs/expect#tobevalue
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expect(Object.is(fixBirdCountLog(birdsPerDay), birdsPerDay)).toBe(true);
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});
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test('works for a short bird count list', () => {
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expect(fixBirdCountLog([4, 2])).toEqual([5, 2]);
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});
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test('works for a long bird count list', () => {
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// prettier-ignore
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const birdsPerDay = [2, 8, 4, 1, 3, 5, 0, 4, 1, 6, 0, 3, 0, 1, 5, 4, 1, 1, 2, 6];
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// prettier-ignore
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const expected = [3, 8, 5, 1, 4, 5, 1, 4, 2, 6, 1, 3, 1, 1, 6, 4, 2, 1, 3, 6];
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expect(fixBirdCountLog(birdsPerDay)).toEqual(expected);
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});
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});
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function randomArray(length) {
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return Array.from({ length: length }, () => Math.floor(Math.random() * 8));
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}
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