diffGetter.test.ts•1.39 kB
import { generateUnifiedDiff } from '../src/diffGetter';
describe('generateUnifiedDiff', () => {
it('should return an empty string when there are no changes', () => {
const oldString = 'Hello World';
const newString = 'Hello World';
const result = generateUnifiedDiff(oldString, newString);
expect(result).toBe('');
});
it('should generate a unified diff for changed content', () => {
const oldString = 'Hello World';
const newString = 'Hello GitHub Copilot';
const result = generateUnifiedDiff(oldString, newString);
expect(result).toContain('Hello World');
expect(result).toContain('Hello GitHub Copilot');
});
it('should include headers in the diff', () => {
const oldString = 'Hello World';
const newString = 'Hello GitHub Copilot';
const oldHeader = 'v1';
const newHeader = 'v2';
const result = generateUnifiedDiff(oldString, newString, oldHeader, newHeader);
expect(result).toContain('--- v1');
expect(result).toContain('+++ v2');
});
it('should include file name in the diff', () => {
const oldString = 'Hello World';
const newString = 'Hello GitHub Copilot';
const fileName = 'testFile.txt';
const result = generateUnifiedDiff(oldString, newString, '', '', fileName);
expect(result).toContain('--- testFile.txt');
expect(result).toContain('+++ testFile.txt');
});
});