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/**
* @license
* Copyright 2025 Google LLC
* SPDX-License-Identifier: Apache-2.0
*/
import { describe, expect, it } from 'vitest';
import { getDiffStat } from './diffOptions.js';
describe('getDiffStat', () => {
const fileName = 'test.txt';
it('should return 0 for all stats when there are no changes', () => {
const oldStr = 'line1\nline2\n';
const aiStr = 'line1\nline2\n';
const userStr = 'line1\nline2\n';
const diffStat = getDiffStat(fileName, oldStr, aiStr, userStr);
expect(diffStat).toEqual({
ai_added_lines: 0,
ai_removed_lines: 0,
user_added_lines: 0,
user_removed_lines: 0,
});
});
it('should correctly report AI additions', () => {
const oldStr = 'line1\nline2\n';
const aiStr = 'line1\nline2\nline3\n';
const userStr = 'line1\nline2\nline3\n';
const diffStat = getDiffStat(fileName, oldStr, aiStr, userStr);
expect(diffStat).toEqual({
ai_added_lines: 1,
ai_removed_lines: 0,
user_added_lines: 0,
user_removed_lines: 0,
});
});
it('should correctly report AI removals', () => {
const oldStr = 'line1\nline2\nline3\n';
const aiStr = 'line1\nline3\n';
const userStr = 'line1\nline3\n';
const diffStat = getDiffStat(fileName, oldStr, aiStr, userStr);
expect(diffStat).toEqual({
ai_added_lines: 0,
ai_removed_lines: 1,
user_added_lines: 0,
user_removed_lines: 0,
});
});
it('should correctly report AI modifications', () => {
const oldStr = 'line1\nline2\nline3\n';
const aiStr = 'line1\nline_two\nline3\n';
const userStr = 'line1\nline_two\nline3\n';
const diffStat = getDiffStat(fileName, oldStr, aiStr, userStr);
expect(diffStat).toEqual({
ai_added_lines: 1,
ai_removed_lines: 1,
user_added_lines: 0,
user_removed_lines: 0,
});
});
it('should correctly report user additions', () => {
const oldStr = 'line1\nline2\n';
const aiStr = 'line1\nline2\nline3\n';
const userStr = 'line1\nline2\nline3\nline4\n';
const diffStat = getDiffStat(fileName, oldStr, aiStr, userStr);
expect(diffStat).toEqual({
ai_added_lines: 1,
ai_removed_lines: 0,
user_added_lines: 1,
user_removed_lines: 0,
});
});
it('should correctly report user removals', () => {
const oldStr = 'line1\nline2\n';
const aiStr = 'line1\nline2\nline3\n';
const userStr = 'line1\nline2\n';
const diffStat = getDiffStat(fileName, oldStr, aiStr, userStr);
expect(diffStat).toEqual({
ai_added_lines: 1,
ai_removed_lines: 0,
user_added_lines: 0,
user_removed_lines: 1,
});
});
it('should correctly report user modifications', () => {
const oldStr = 'line1\nline2\n';
const aiStr = 'line1\nline2\nline3\n';
const userStr = 'line1\nline2\nline_three\n';
const diffStat = getDiffStat(fileName, oldStr, aiStr, userStr);
expect(diffStat).toEqual({
ai_added_lines: 1,
ai_removed_lines: 0,
user_added_lines: 1,
user_removed_lines: 1,
});
});
it('should handle complex changes from both AI and user', () => {
const oldStr = 'line1\nline2\nline3\nline4\n';
const aiStr = 'line_one\nline2\nline_three\nline4\n';
const userStr = 'line_one\nline_two\nline_three\nline4\nline5\n';
const diffStat = getDiffStat(fileName, oldStr, aiStr, userStr);
expect(diffStat).toEqual({
ai_added_lines: 2,
ai_removed_lines: 2,
user_added_lines: 2,
user_removed_lines: 1,
});
});
it('should report a single line modification as one addition and one removal', () => {
const oldStr = 'hello world';
const aiStr = 'hello universe';
const userStr = 'hello universe';
const diffStat = getDiffStat(fileName, oldStr, aiStr, userStr);
expect(diffStat).toEqual({
ai_added_lines: 1,
ai_removed_lines: 1,
user_added_lines: 0,
user_removed_lines: 0,
});
});
});
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