Added easy-sitemap lib

Signed-off-by: Avior <florian.bouillon@delta-wings.net>

packages/easy-sitemap/__tests__/index.test.ts

@@ -0,0 +1,43 @@
+/// <reference types="jest" />
+
+import Sitemap from '../src/Sitemap'
+
+describe('Basic Sitemap Tests', () => {
+	it('should return an empty sitemap', () => {
+		const sitemap = new Sitemap('https://www.example.com')
+		expect(sitemap.build()).toMatchSnapshot()
+	})
+	it('should return a basic sitemap', () => {
+		const sitemap = new Sitemap('https://www.example.com')
+		sitemap.addEntry('/path')
+		sitemap.addEntry('/')
+		expect(sitemap.build()).toMatchSnapshot()
+	})
+	it('should return a sitemap', () => {
+		const sitemap = new Sitemap('https://www.example.com')
+		sitemap.addEntry('/path', {
+			changefreq: 'always',
+			lastmod: new Date('2021-01-20'),
+			priority: 1
+		})
+		sitemap.addEntry('/')
+		expect(sitemap.build()).toMatchSnapshot()
+	})
+	it('should not add priority when it is incorrect', () => {
+		const sitemap = new Sitemap('https://www.example.com')
+		sitemap.addEntry('/path', {
+			// @ts-expect-error
+			priority: 255
+		})
+		expect(sitemap.build()).toMatchSnapshot()
+	})
+	it('should not add changefreq if value is incorrect', () => {
+		const sitemap = new Sitemap('https://www.example.com')
+		sitemap.addEntry('/path', {
+			// @ts-expect-error
+			changefreq: 'pouet'
+		})
+		expect(sitemap.build()).toMatchSnapshot()
+	})
+
+})