import { describe, it, expect, vi, beforeEach } from 'vitest';
import { existsSync, mkdirSync } from 'fs';
vi.mock('fs', async (importOriginal) => {
const actual = await importOriginal<typeof import('fs')>();
return {
...actual,
existsSync: vi.fn(),
mkdirSync: vi.fn(),
};
});
// Import after mock setup so the module gets the mocked fs
import { ok, err, timestamp, ensureDir } from '../../src/utils/helpers.js';
const mockExistsSync = vi.mocked(existsSync);
const mockMkdirSync = vi.mocked(mkdirSync);
describe('ok', () => {
it('returns MCP response with text content and no isError', () => {
const result = ok('success message');
expect(result).toEqual({
content: [{ type: 'text', text: 'success message' }],
});
expect(result.isError).toBeUndefined();
});
});
describe('err', () => {
it('returns MCP response with text content and isError: true', () => {
const result = err('failure message');
expect(result).toEqual({
content: [{ type: 'text', text: 'failure message' }],
isError: true,
});
});
});
describe('timestamp', () => {
it('returns ISO-like string with colons and dots replaced by dashes', () => {
const ts = timestamp();
// Should not contain colons or dots
expect(ts).not.toContain(':');
expect(ts).not.toContain('.');
// Should contain dashes and T (ISO format structure)
expect(ts).toMatch(/^\d{4}-\d{2}-\d{2}T\d{2}-\d{2}-\d{2}-\d{3}Z$/);
});
it('returns different values over time', async () => {
const ts1 = timestamp();
// Small delay to ensure time changes
await new Promise((r) => setTimeout(r, 5));
const ts2 = timestamp();
// They could be the same within ms, but the format should be valid
expect(ts2).toMatch(/^\d{4}-/);
});
});
describe('ensureDir', () => {
beforeEach(() => {
vi.clearAllMocks();
});
it('calls mkdirSync with recursive when dir does not exist', () => {
mockExistsSync.mockReturnValueOnce(false);
ensureDir('/some/path/file.png');
expect(mockMkdirSync).toHaveBeenCalledWith('/some/path', { recursive: true });
});
it('does not call mkdirSync when dir already exists', () => {
mockExistsSync.mockReturnValueOnce(true);
ensureDir('/existing/path/file.png');
expect(mockMkdirSync).not.toHaveBeenCalled();
});
});
