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docs/tests/unit/mini-toc-items.js

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JavaScript

import { expect } from '@jest/globals'
import getMiniTocItems from '../../lib/get-mini-toc-items'
// The getMiniTocItems() function requires that every <h2> and <h3>
// contains a...
//
// <a class="doctocat-link">
//
// tag within the tag. Having to manually put that into every HTML
// snippet in each test is tediuous so this function makes it convenient.
function injectDoctocatLinks(html) {
let counter = 0
return html.replace(/<h\d>/g, (m) => {
return `${m}\n<a href="#section${++counter}" class="doctocat-link">🔗</a>\n`
})
}
describe('mini toc items', () => {
// Mock scenario from: /en/rest/reference/activity
test('basic nested structure is created', async () => {
const html = injectDoctocatLinks(`
<body>
<h1>Test</h1>
<h2>Section 1</h2>
<h3>Section 1 A</h3>
<h3>Section 1 B</h3>
<h3>Section 1 C</h3>
<h2>Section 2</h2>
<h3>Section 2 A</h3>
</body>
`)
const tocItems = getMiniTocItems(html, 3)
expect(tocItems.length).toBe(2)
expect(tocItems[0].items.length).toBe(3)
})
/**
* Mock scenario from: /en/rest/reference/apps
* The TOC starts out with lower importance headers that aren't nested in higher importance headers
*
* 3
* 3
* 2
* 3
* 2
* 3
*/
test('creates toc that starts with lower importance headers', async () => {
const html = injectDoctocatLinks(`
<h1>Test</h1>
<h3>Section 1 A</h3>
<h3>Section 1 B</h3>
<h2>Section 2</h2>
<h3>Section 2 A</h3>
<h2>Section 3</h2>
<h3>Section 3 A</h3>
`)
const tocItems = getMiniTocItems(html, 3)
expect(tocItems.length).toBe(4)
expect(tocItems[3].items.length).toBe(1)
})
// Mock scenario from: /en/organizations/managing-membership-in-your-organization/inviting-users-to-join-your-organization
test('creates empty toc', async () => {
const html = `
<h1>Test</h1>
`
const tocItems = getMiniTocItems(html, 3)
expect(tocItems.length).toBe(0)
})
// Mock scenario from: /en/repositories/creating-and-managing-repositories/about-repositories
test('creates flat toc', async () => {
const html = injectDoctocatLinks(`
<h1>Test</h1>
<h2>Section 1</h2>
<h2>Section 2</h2>
`)
const tocItems = getMiniTocItems(html, 3)
expect(tocItems.length).toBe(2)
expect(tocItems[0].items).toBeUndefined()
})
test('handles deeply nested toc', async () => {
const html = injectDoctocatLinks(`
<h1>Test</h1>
<h2>Section 1</h2>
<h2>Section 2</h2>
<h3>Section 2 A</h3>
<h4>Section 2 A 1</h4>
<h5>Section 2 A 1 a</h5>
<h2>Section 3</h2>
`)
const tocItems = getMiniTocItems(html, 5)
expect(tocItems.length).toBe(3)
expect(tocItems[1].items[0].items[0].items.length).toBe(1)
})
})