| 1 | import { render } from '@testing-library/react'; |
| 2 | import { describe, it, expect, vi } from 'vitest'; |
| 3 | import { Code } from './code'; |
| 4 | import { RevealContext } from '../reveal-context'; |
| 5 | |
| 6 | describe('Code', () => { |
| 7 | it('renders pre/code and trims multiline template literals by default', () => { |
| 8 | const { container } = render( |
| 9 | <Code language="javascript">{` |
| 10 | function add(a, b) { |
| 11 | return a + b; |
| 12 | } |
| 13 | `}</Code> |
| 14 | ); |
| 15 | |
| 16 | const pre = container.querySelector('pre'); |
| 17 | const code = container.querySelector('pre > code'); |
| 18 | |
| 19 | expect(pre).toBeInTheDocument(); |
| 20 | expect(pre).toHaveClass('code-wrapper'); |
| 21 | expect(code).toHaveClass('javascript'); |
| 22 | expect(code?.textContent).toBe('function add(a, b) {\n\treturn a + b;\n}'); |
| 23 | }); |
| 24 | |
| 25 | it('can disable trimming', () => { |
| 26 | const source = '\n\tconst value = 1;\n'; |
| 27 | const { container } = render(<Code trim={false}>{source}</Code>); |
| 28 | const code = container.querySelector('pre > code'); |
| 29 | |
| 30 | expect(code?.textContent).toBe(source); |
| 31 | }); |
| 32 | |
| 33 | it('maps line number props to reveal data attributes', () => { |
| 34 | const { container } = render( |
| 35 | <Code language="js" lineNumbers="|2,4-6|8" startFrom={10}> |
| 36 | {`console.log('hello')`} |
| 37 | </Code> |
| 38 | ); |
| 39 | |
| 40 | const code = container.querySelector('pre > code'); |
| 41 | expect(code).toHaveAttribute('data-line-numbers', '|2,4-6|8'); |
| 42 | expect(code).toHaveAttribute('data-ln-start-from', '10'); |
| 43 | }); |
| 44 | |
| 45 | it('invokes the Reveal highlight plugin when registered on the deck', () => { |
| 46 | const highlightBlock = vi.fn((block: HTMLElement) => { |
| 47 | block.setAttribute('data-highlighted', 'yes'); |
| 48 | }); |
| 49 | const deck = { |
| 50 | getPlugin: vi.fn().mockReturnValue({ highlightBlock }), |
| 51 | syncFragments: vi.fn(), |
| 52 | } as any; |
| 53 | |
| 54 | const { container } = render( |
| 55 | <RevealContext.Provider value={deck}> |
| 56 | <section> |
| 57 | <Code language="javascript">{`console.log('hello')`}</Code> |
| 58 | </section> |
| 59 | </RevealContext.Provider> |
| 60 | ); |
| 61 | |
| 62 | const code = container.querySelector('pre > code'); |
| 63 | expect(deck.getPlugin).toHaveBeenCalledWith('highlight'); |
| 64 | expect(highlightBlock).toHaveBeenCalledWith(code); |
| 65 | expect(deck.syncFragments).toHaveBeenCalledWith(expect.any(HTMLElement)); |
| 66 | }); |
| 67 | |
| 68 | it('rehighlights updated code without accumulating generated fragments', () => { |
| 69 | const highlightBlock = vi.fn((block: HTMLElement) => { |
| 70 | block.setAttribute('data-highlighted', 'yes'); |
| 71 | const fragment = block.cloneNode(true) as HTMLElement; |
| 72 | fragment.classList.add('fragment'); |
| 73 | block.parentElement?.appendChild(fragment); |
| 74 | }); |
| 75 | |
| 76 | const deck = { |
| 77 | getPlugin: vi.fn().mockReturnValue({ highlightBlock }), |
| 78 | syncFragments: vi.fn(), |
| 79 | } as any; |
| 80 | |
| 81 | const { container, rerender } = render( |
| 82 | <RevealContext.Provider value={deck}> |
| 83 | <section> |
| 84 | <Code lineNumbers="|1|2">{`console.log('one')`}</Code> |
| 85 | </section> |
| 86 | </RevealContext.Provider> |
| 87 | ); |
| 88 | |
| 89 | expect(container.querySelectorAll('pre > code.fragment')).toHaveLength(1); |
| 90 | |
| 91 | rerender( |
| 92 | <RevealContext.Provider value={deck}> |
| 93 | <section> |
| 94 | <Code lineNumbers="|1|2">{`console.log('two')`}</Code> |
| 95 | </section> |
| 96 | </RevealContext.Provider> |
| 97 | ); |
| 98 | |
| 99 | expect(highlightBlock).toHaveBeenCalledTimes(2); |
| 100 | expect(container.querySelectorAll('pre > code.fragment')).toHaveLength(1); |
| 101 | expect(container.querySelector('pre > code:not(.fragment)')).toHaveTextContent( |
| 102 | "console.log('two')" |
| 103 | ); |
| 104 | }); |
| 105 | |
| 106 | it('restores full line-number steps before rehighlighting after plugin mutation', () => { |
| 107 | const seenLineNumbers: string[] = []; |
| 108 | const highlightBlock = vi.fn((block: HTMLElement) => { |
| 109 | seenLineNumbers.push(block.getAttribute('data-line-numbers') || ''); |
| 110 | block.setAttribute('data-highlighted', 'yes'); |
| 111 | |
| 112 | // Mimic RevealHighlight: original block is rewritten to the first step and |
| 113 | // an extra fragment block is appended for following steps. |
| 114 | block.setAttribute('data-line-numbers', '1'); |
| 115 | const fragment = block.cloneNode(true) as HTMLElement; |
| 116 | fragment.classList.add('fragment'); |
| 117 | fragment.setAttribute('data-line-numbers', '3'); |
| 118 | block.parentElement?.appendChild(fragment); |
| 119 | }); |
| 120 | |
| 121 | const deck = { |
| 122 | getPlugin: vi.fn().mockReturnValue({ highlightBlock }), |
| 123 | syncFragments: vi.fn(), |
| 124 | } as any; |
| 125 | |
| 126 | const { rerender } = render( |
| 127 | <RevealContext.Provider value={deck}> |
| 128 | <section> |
| 129 | <Code language="javascript" lineNumbers="1|3">{`console.log('one')`}</Code> |
| 130 | </section> |
| 131 | </RevealContext.Provider> |
| 132 | ); |
| 133 | |
| 134 | rerender( |
| 135 | <RevealContext.Provider value={deck}> |
| 136 | <section> |
| 137 | <Code language="ts" lineNumbers="1|3">{`console.log('one')`}</Code> |
| 138 | </section> |
| 139 | </RevealContext.Provider> |
| 140 | ); |
| 141 | |
| 142 | expect(seenLineNumbers).toEqual(['1|3', '1|3']); |
| 143 | }); |
| 144 | }); |
| 145 |