/**
 * @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({
            model_added_lines: 0,
            model_removed_lines: 0,
            model_added_chars: 0,
            model_removed_chars: 0,
            user_added_lines: 0,
            user_removed_lines: 0,
            user_added_chars: 0,
            user_removed_chars: 0,
        });
    });
    it('should correctly report model 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({
            model_added_lines: 1,
            model_removed_lines: 0,
            model_added_chars: 5,
            model_removed_chars: 0,
            user_added_lines: 0,
            user_removed_lines: 0,
            user_added_chars: 0,
            user_removed_chars: 0,
        });
    });
    it('should correctly report model 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({
            model_added_lines: 0,
            model_removed_lines: 1,
            model_added_chars: 0,
            model_removed_chars: 5,
            user_added_lines: 0,
            user_removed_lines: 0,
            user_added_chars: 0,
            user_removed_chars: 0,
        });
    });
    it('should correctly report model 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({
            model_added_lines: 1,
            model_removed_lines: 1,
            model_added_chars: 8,
            model_removed_chars: 5,
            user_added_lines: 0,
            user_removed_lines: 0,
            user_added_chars: 0,
            user_removed_chars: 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({
            model_added_lines: 1,
            model_removed_lines: 0,
            model_added_chars: 5,
            model_removed_chars: 0,
            user_added_lines: 1,
            user_removed_lines: 0,
            user_added_chars: 5,
            user_removed_chars: 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({
            model_added_lines: 1,
            model_removed_lines: 0,
            model_added_chars: 5,
            model_removed_chars: 0,
            user_added_lines: 0,
            user_removed_lines: 1,
            user_added_chars: 0,
            user_removed_chars: 5,
        });
    });
    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({
            model_added_lines: 1,
            model_removed_lines: 0,
            model_added_chars: 5,
            model_removed_chars: 0,
            user_added_lines: 1,
            user_removed_lines: 1,
            user_added_chars: 10,
            user_removed_chars: 5,
        });
    });
    it('should handle complex changes from both model 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({
            model_added_lines: 2,
            model_removed_lines: 2,
            model_added_chars: 18,
            model_removed_chars: 10,
            user_added_lines: 2,
            user_removed_lines: 1,
            user_added_chars: 13,
            user_removed_chars: 5,
        });
    });
    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({
            model_added_lines: 1,
            model_removed_lines: 1,
            model_added_chars: 14,
            model_removed_chars: 11,
            user_added_lines: 0,
            user_removed_lines: 0,
            user_added_chars: 0,
            user_removed_chars: 0,
        });
    });
    it('should correctly report whitespace-only changes', () => {
        const fileName = 'test.py';
        const oldStr = 'def hello():\n print("world")';
        const aiStr = 'def hello():\n    print("world")';
        const userStr = aiStr;
        const diffStat = getDiffStat(fileName, oldStr, aiStr, userStr);
        expect(diffStat).toEqual({
            model_added_lines: 1,
            model_removed_lines: 1,
            model_added_chars: 18,
            model_removed_chars: 15,
            user_added_lines: 0,
            user_removed_lines: 0,
            user_added_chars: 0,
            user_removed_chars: 0,
        });
    });
});
//# sourceMappingURL=diffOptions.test.js.map