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40 lines
1.1 KiB
40 lines
1.1 KiB
3 years ago
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import { isLeap } from './leap'
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describe('A leap year', () => {
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test('year not divisible by 4 in common year', () => {
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expect(isLeap(2015)).toBe(false)
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})
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test('year divisible by 2, not divisible by 4 in common year', () => {
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expect(isLeap(1970)).toBe(false)
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})
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test('year divisible by 4, not divisible by 100 in leap year', () => {
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expect(isLeap(1996)).toBe(true)
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})
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test('year divisible by 4 and 5 is still a leap year', () => {
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expect(isLeap(1960)).toBe(true)
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})
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test('year divisible by 100, not divisible by 400 in common year', () => {
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expect(isLeap(2100)).toBe(false)
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})
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test('year divisible by 100 but not by 3 is still not a leap year', () => {
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expect(isLeap(1900)).toBe(false)
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})
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test('year divisible by 400 in leap year', () => {
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expect(isLeap(2000)).toBe(true)
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})
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test('year divisible by 400 but not by 125 is still a leap year', () => {
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expect(isLeap(2400)).toBe(true)
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})
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test('year divisible by 200, not divisible by 400 in common year', () => {
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expect(isLeap(1800)).toBe(false)
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})
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})
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