import type { MCPServerParams } from '@src/core/types/transport.js';
import type { ContextData } from '@src/types/context.js';
import { HandlebarsTemplateRenderer } from './handlebarsTemplateRenderer.js';
describe('HandlebarsTemplateRenderer', () => {
let renderer: HandlebarsTemplateRenderer;
let mockContext: ContextData;
beforeEach(() => {
renderer = new HandlebarsTemplateRenderer();
mockContext = {
project: {
path: '/Users/test/workplace/test-project',
name: 'test-project',
},
user: {
username: 'testuser',
},
environment: {},
sessionId: 'test-session-123',
timestamp: '2024-01-01T00:00:00Z',
version: 'v1',
};
});
describe('renderTemplate', () => {
it('should render serena template with project.path variable', () => {
const serenaTemplate: MCPServerParams = {
type: 'stdio',
command: 'uv',
args: [
'run',
'--directory',
'/Users/test/workplace/serena',
'serena',
'start-mcp-server',
'--log-level',
'ERROR',
'--context',
'ide-assistant',
'--project',
'{{project.path}}', // This should be rendered
],
tags: ['serena'],
};
const rendered = renderer.renderTemplate(serenaTemplate, mockContext);
expect(rendered.args).toContain('/Users/test/workplace/test-project');
expect(rendered.args).not.toContain('{{project.path}}');
});
it('should render nested object paths', () => {
const template: MCPServerParams = {
type: 'stdio',
command: 'echo',
args: ['{{project.path}}'],
env: {
PROJECT_NAME: '{{project.name}}',
USER: '{{user.username}}',
},
};
const rendered = renderer.renderTemplate(template, mockContext);
expect(rendered.args).toEqual(['/Users/test/workplace/test-project']);
// Check that env was rendered (it's now a Record<string, string>)
const envRecord = rendered.env as Record<string, string>;
expect(envRecord.PROJECT_NAME).toBe('test-project');
expect(envRecord.USER).toBe('testuser');
});
it('should not modify templates without variables', () => {
const template: MCPServerParams = {
type: 'stdio',
command: 'echo',
args: ['hello', 'world'],
};
const rendered = renderer.renderTemplate(template, mockContext);
expect(rendered).toEqual(template);
});
it('should handle empty context gracefully', () => {
const template: MCPServerParams = {
type: 'stdio',
command: 'echo',
args: ['{{project.path}}'],
};
const rendered = renderer.renderTemplate(template, {} as ContextData);
// Handlebars renders missing variables as empty strings
expect(rendered.args).toEqual(['']);
});
it('should handle missing variables gracefully', () => {
const template: MCPServerParams = {
type: 'stdio',
command: 'echo',
args: ['{{project.nonexistent}}'],
};
const rendered = renderer.renderTemplate(template, mockContext);
// Handlebars renders missing variables as empty strings
expect(rendered.args).toEqual(['']);
});
});
});
