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/**
* @license
* Copyright 2025 Google LLC
* SPDX-License-Identifier: Apache-2.0
*/
import { render } from 'ink-testing-library';
import { describe, it, expect, vi, beforeEach } from 'vitest';
import { MarkdownDisplay } from './MarkdownDisplay.js';
import { LoadedSettings } from '../../config/settings.js';
import { SettingsContext } from '../contexts/SettingsContext.js';
describe('<MarkdownDisplay />', () => {
const baseProps = {
isPending: false,
terminalWidth: 80,
availableTerminalHeight: 40,
};
const mockSettings = new LoadedSettings(
{ path: '', settings: {} },
{ path: '', settings: {} },
{ path: '', settings: {} },
[],
);
beforeEach(() => {
vi.clearAllMocks();
});
it('renders nothing for empty text', () => {
const { lastFrame } = render(
<SettingsContext.Provider value={mockSettings}>
<MarkdownDisplay {...baseProps} text="" />
</SettingsContext.Provider>,
);
expect(lastFrame()).toMatchSnapshot();
});
it('renders a simple paragraph', () => {
const text = 'Hello, world.';
const { lastFrame } = render(
<SettingsContext.Provider value={mockSettings}>
<MarkdownDisplay {...baseProps} text={text} />
</SettingsContext.Provider>,
);
expect(lastFrame()).toMatchSnapshot();
});
it('renders headers with correct levels', () => {
const text = `
# Header 1
## Header 2
### Header 3
#### Header 4
`;
const { lastFrame } = render(
<SettingsContext.Provider value={mockSettings}>
<MarkdownDisplay {...baseProps} text={text} />
</SettingsContext.Provider>,
);
expect(lastFrame()).toMatchSnapshot();
});
it('renders a fenced code block with a language', () => {
const text = '```javascript\nconst x = 1;\nconsole.log(x);\n```';
const { lastFrame } = render(
<SettingsContext.Provider value={mockSettings}>
<MarkdownDisplay {...baseProps} text={text} />
</SettingsContext.Provider>,
);
expect(lastFrame()).toMatchSnapshot();
});
it('renders a fenced code block without a language', () => {
const text = '```\nplain text\n```';
const { lastFrame } = render(
<SettingsContext.Provider value={mockSettings}>
<MarkdownDisplay {...baseProps} text={text} />
</SettingsContext.Provider>,
);
expect(lastFrame()).toMatchSnapshot();
});
it('handles unclosed (pending) code blocks', () => {
const text = '```typescript\nlet y = 2;';
const { lastFrame } = render(
<SettingsContext.Provider value={mockSettings}>
<MarkdownDisplay {...baseProps} text={text} isPending={true} />
</SettingsContext.Provider>,
);
expect(lastFrame()).toMatchSnapshot();
});
it('renders unordered lists with different markers', () => {
const text = `
- item A
* item B
+ item C
`;
const { lastFrame } = render(
<SettingsContext.Provider value={mockSettings}>
<MarkdownDisplay {...baseProps} text={text} />
</SettingsContext.Provider>,
);
expect(lastFrame()).toMatchSnapshot();
});
it('renders nested unordered lists', () => {
const text = `
* Level 1
* Level 2
* Level 3
`;
const { lastFrame } = render(
<SettingsContext.Provider value={mockSettings}>
<MarkdownDisplay {...baseProps} text={text} />
</SettingsContext.Provider>,
);
expect(lastFrame()).toMatchSnapshot();
});
it('renders ordered lists', () => {
const text = `
1. First item
2. Second item
`;
const { lastFrame } = render(
<SettingsContext.Provider value={mockSettings}>
<MarkdownDisplay {...baseProps} text={text} />
</SettingsContext.Provider>,
);
expect(lastFrame()).toMatchSnapshot();
});
it('renders horizontal rules', () => {
const text = `
Hello
---
World
***
Test
`;
const { lastFrame } = render(
<SettingsContext.Provider value={mockSettings}>
<MarkdownDisplay {...baseProps} text={text} />
</SettingsContext.Provider>,
);
expect(lastFrame()).toMatchSnapshot();
});
it('renders tables correctly', () => {
const text = `
| Header 1 | Header 2 |
|----------|:--------:|
| Cell 1 | Cell 2 |
| Cell 3 | Cell 4 |
`;
const { lastFrame } = render(
<SettingsContext.Provider value={mockSettings}>
<MarkdownDisplay {...baseProps} text={text} />
</SettingsContext.Provider>,
);
expect(lastFrame()).toMatchSnapshot();
});
it('handles a table at the end of the input', () => {
const text = `
Some text before.
| A | B |
|---|
| 1 | 2 |`;
const { lastFrame } = render(
<SettingsContext.Provider value={mockSettings}>
<MarkdownDisplay {...baseProps} text={text} />
</SettingsContext.Provider>,
);
expect(lastFrame()).toMatchSnapshot();
});
it('inserts a single space between paragraphs', () => {
const text = `Paragraph 1.
Paragraph 2.`;
const { lastFrame } = render(
<SettingsContext.Provider value={mockSettings}>
<MarkdownDisplay {...baseProps} text={text} />
</SettingsContext.Provider>,
);
expect(lastFrame()).toMatchSnapshot();
});
it('correctly parses a mix of markdown elements', () => {
const text = `
# Main Title
Here is a paragraph.
- List item 1
- List item 2
\`\`\`
some code
\`\`\`
Another paragraph.
`;
const { lastFrame } = render(
<SettingsContext.Provider value={mockSettings}>
<MarkdownDisplay {...baseProps} text={text} />
</SettingsContext.Provider>,
);
expect(lastFrame()).toMatchSnapshot();
});
it('hides line numbers in code blocks when showLineNumbers is false', () => {
const text = '```javascript\nconst x = 1;\n```';
const settings = new LoadedSettings(
{ path: '', settings: {} },
{ path: '', settings: { showLineNumbers: false } },
{ path: '', settings: {} },
[],
);
const { lastFrame } = render(
<SettingsContext.Provider value={settings}>
<MarkdownDisplay {...baseProps} text={text} />
</SettingsContext.Provider>,
);
expect(lastFrame()).toMatchSnapshot();
expect(lastFrame()).not.toContain(' 1 ');
});
it('shows line numbers in code blocks by default', () => {
const text = '```javascript\nconst x = 1;\n```';
const { lastFrame } = render(
<SettingsContext.Provider value={mockSettings}>
<MarkdownDisplay {...baseProps} text={text} />
</SettingsContext.Provider>,
);
expect(lastFrame()).toMatchSnapshot();
expect(lastFrame()).toContain(' 1 ');
});
});
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