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/**
* @license
* Copyright 2025 Google LLC
* SPDX-License-Identifier: Apache-2.0
*/
import { describe, it, expect } from 'vitest';
import { findLastSafeSplitPoint } from './markdownUtilities.js';
describe('markdownUtilities', () => {
describe('findLastSafeSplitPoint', () => {
it('should split at the last double newline if not in a code block', () => {
const content = 'paragraph1\n\nparagraph2\n\nparagraph3';
expect(findLastSafeSplitPoint(content)).toBe(24); // After the second \n\n
});
it('should return content.length if no safe split point is found', () => {
const content = 'longstringwithoutanysafesplitpoint';
expect(findLastSafeSplitPoint(content)).toBe(content.length);
});
it('should prioritize splitting at \n\n over being at the very end of the string if the end is not in a code block', () => {
const content = 'Some text here.\n\nAnd more text here.';
expect(findLastSafeSplitPoint(content)).toBe(17); // after the \n\n
});
it('should return content.length if the only \n\n is inside a code block and the end of content is not', () => {
const content = '```\nignore this\n\nnewline\n```KeepThis';
expect(findLastSafeSplitPoint(content)).toBe(content.length);
});
it('should correctly identify the last \n\n even if it is followed by text not in a code block', () => {
const content =
'First part.\n\nSecond part.\n\nThird part, then some more text.';
// Split should be after "Second part.\n\n"
// "First part.\n\n" is 13 chars. "Second part.\n\n" is 14 chars. Total 27.
expect(findLastSafeSplitPoint(content)).toBe(27);
});
it('should return content.length if content is empty', () => {
const content = '';
expect(findLastSafeSplitPoint(content)).toBe(0);
});
it('should return content.length if content has no newlines and no code blocks', () => {
const content = 'Single line of text';
expect(findLastSafeSplitPoint(content)).toBe(content.length);
});
});
});
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