41 lines
1.1 KiB
TypeScript
41 lines
1.1 KiB
TypeScript
import '@testing-library/jest-dom';
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import { render } from '@testing-library/react';
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import Prism from 'prismjs';
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import Fence from '../../src/app/components/Fence';
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describe('Fence component', () => {
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it('renders a code block with highlighted syntax', () => {
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const content = 'console.log(app)';
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const language = 'javascript';
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const highlightedCode = `
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console
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<span class="token function">log</span>
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<span class="token punctuation">(</span>
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app
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<span class="token punctuation">)</span>
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<span class="token punctuation">;</span>
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`;
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jest
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.spyOn(Prism, 'highlight')
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.mockReturnValue(highlightedCode);
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const { container } = render(
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<Fence content={content} language={language} />
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);
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const codeBlocks =
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container.getElementsByTagName('code');
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expect(codeBlocks).toHaveLength(1);
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const codeBlock = codeBlocks[0];
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expect(codeBlock).toBeInTheDocument();
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expect(codeBlock.innerHTML).toEqual(highlightedCode);
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expect(Prism.highlight).toHaveBeenCalledWith(
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content,
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Prism.languages[language],
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language
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);
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});
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});
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