mirror of
https://github.com/czlonkowski/n8n-mcp.git
synced 2026-02-06 05:23:08 +00:00
96dfbc3a16
Major consolidation of MCP tools using mode-based parameters for better AI agent ergonomics: Node Tools: - get_node_documentation → get_node with mode='documentation' - search_node_properties → get_node with mode='search_properties' - get_property_dependencies → removed Validation Tools: - validate_node_operation + validate_node_minimal → validate_node with mode param Template Tools: - list_node_templates → search_templates with searchMode='nodes' - search_templates_by_metadata → search_templates with searchMode='metadata' - get_templates_for_task → search_templates with searchMode='task' Workflow Getters: - n8n_get_workflow_details/structure/minimal → n8n_get_workflow with mode param Execution Tools: - n8n_list/get/delete_execution → n8n_executions with action param Test updates for all consolidated tools. 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <noreply@anthropic.com> Conceived by Romuald Członkowski - https://www.aiadvisors.pl/en
551 lines
23 KiB
TypeScript
551 lines
23 KiB
TypeScript
import { describe, it, expect, beforeEach, afterEach, vi } from 'vitest';
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import { N8NDocumentationMCPServer } from '../../../src/mcp/server';
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// Mock the database and dependencies
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vi.mock('../../../src/database/database-adapter');
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vi.mock('../../../src/database/node-repository');
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vi.mock('../../../src/templates/template-service');
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vi.mock('../../../src/utils/logger');
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class TestableN8NMCPServer extends N8NDocumentationMCPServer {
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// Expose the private validateToolParams method for testing
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public testValidateToolParams(toolName: string, args: any, requiredParams: string[]): void {
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return (this as any).validateToolParams(toolName, args, requiredParams);
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}
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// Expose the private executeTool method for testing
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public async testExecuteTool(name: string, args: any): Promise<any> {
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return (this as any).executeTool(name, args);
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}
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}
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describe('Parameter Validation', () => {
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let server: TestableN8NMCPServer;
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beforeEach(() => {
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// Set environment variable to use in-memory database
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process.env.NODE_DB_PATH = ':memory:';
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server = new TestableN8NMCPServer();
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});
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afterEach(() => {
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delete process.env.NODE_DB_PATH;
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});
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describe('validateToolParams', () => {
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describe('Basic Parameter Validation', () => {
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it('should pass validation when all required parameters are provided', () => {
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const args = { nodeType: 'nodes-base.httpRequest', config: {} };
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expect(() => {
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server.testValidateToolParams('test_tool', args, ['nodeType', 'config']);
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}).not.toThrow();
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});
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it('should throw error when required parameter is missing', () => {
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const args = { config: {} };
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expect(() => {
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server.testValidateToolParams('test_tool', args, ['nodeType', 'config']);
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}).toThrow('Missing required parameters for test_tool: nodeType');
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});
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it('should throw error when multiple required parameters are missing', () => {
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const args = {};
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expect(() => {
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server.testValidateToolParams('test_tool', args, ['nodeType', 'config', 'query']);
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}).toThrow('Missing required parameters for test_tool: nodeType, config, query');
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});
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it('should throw error when required parameter is undefined', () => {
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const args = { nodeType: undefined, config: {} };
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expect(() => {
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server.testValidateToolParams('test_tool', args, ['nodeType', 'config']);
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}).toThrow('Missing required parameters for test_tool: nodeType');
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});
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it('should throw error when required parameter is null', () => {
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const args = { nodeType: null, config: {} };
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expect(() => {
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server.testValidateToolParams('test_tool', args, ['nodeType', 'config']);
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}).toThrow('Missing required parameters for test_tool: nodeType');
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});
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it('should reject when required parameter is empty string (Issue #275 fix)', () => {
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const args = { query: '', limit: 10 };
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expect(() => {
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server.testValidateToolParams('test_tool', args, ['query']);
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}).toThrow('String parameters cannot be empty');
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});
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it('should pass when required parameter is zero', () => {
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const args = { limit: 0, query: 'test' };
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expect(() => {
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server.testValidateToolParams('test_tool', args, ['limit']);
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}).not.toThrow();
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});
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it('should pass when required parameter is false', () => {
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const args = { includeData: false, id: '123' };
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expect(() => {
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server.testValidateToolParams('test_tool', args, ['includeData']);
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}).not.toThrow();
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});
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});
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describe('Edge Cases', () => {
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it('should handle empty args object', () => {
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expect(() => {
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server.testValidateToolParams('test_tool', {}, ['param1']);
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}).toThrow('Missing required parameters for test_tool: param1');
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});
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it('should handle null args', () => {
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expect(() => {
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server.testValidateToolParams('test_tool', null, ['param1']);
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}).toThrow();
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});
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it('should handle undefined args', () => {
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expect(() => {
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server.testValidateToolParams('test_tool', undefined, ['param1']);
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}).toThrow();
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});
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it('should pass when no required parameters are specified', () => {
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const args = { optionalParam: 'value' };
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expect(() => {
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server.testValidateToolParams('test_tool', args, []);
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}).not.toThrow();
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});
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it('should handle special characters in parameter names', () => {
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const args = { 'param-with-dash': 'value', 'param_with_underscore': 'value' };
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expect(() => {
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server.testValidateToolParams('test_tool', args, ['param-with-dash', 'param_with_underscore']);
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}).not.toThrow();
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});
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});
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});
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describe('Tool-Specific Parameter Validation', () => {
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// Mock the actual tool methods to avoid database calls
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beforeEach(() => {
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// Mock all the tool methods that would be called
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vi.spyOn(server as any, 'getNode').mockResolvedValue({ mockResult: true });
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vi.spyOn(server as any, 'searchNodes').mockResolvedValue({ results: [] });
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vi.spyOn(server as any, 'getNodeDocumentation').mockResolvedValue({ docs: 'test' });
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vi.spyOn(server as any, 'searchNodeProperties').mockResolvedValue({ properties: [] });
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// Note: getNodeForTask removed in v2.15.0
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vi.spyOn(server as any, 'validateNodeConfig').mockResolvedValue({ valid: true });
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vi.spyOn(server as any, 'validateNodeMinimal').mockResolvedValue({ missing: [] });
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vi.spyOn(server as any, 'getPropertyDependencies').mockResolvedValue({ dependencies: {} });
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vi.spyOn(server as any, 'getNodeAsToolInfo').mockResolvedValue({ toolInfo: true });
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vi.spyOn(server as any, 'listNodeTemplates').mockResolvedValue({ templates: [] });
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vi.spyOn(server as any, 'getTemplate').mockResolvedValue({ template: {} });
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vi.spyOn(server as any, 'searchTemplates').mockResolvedValue({ templates: [] });
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vi.spyOn(server as any, 'getTemplatesForTask').mockResolvedValue({ templates: [] });
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vi.spyOn(server as any, 'validateWorkflow').mockResolvedValue({ valid: true });
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vi.spyOn(server as any, 'validateWorkflowConnections').mockResolvedValue({ valid: true });
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vi.spyOn(server as any, 'validateWorkflowExpressions').mockResolvedValue({ valid: true });
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});
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describe('get_node', () => {
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it('should require nodeType parameter', async () => {
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await expect(server.testExecuteTool('get_node', {}))
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.rejects.toThrow('Missing required parameters for get_node: nodeType');
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});
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it('should succeed with valid nodeType', async () => {
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const result = await server.testExecuteTool('get_node', {
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nodeType: 'nodes-base.httpRequest'
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});
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expect(result).toEqual({ mockResult: true });
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});
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});
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describe('search_nodes', () => {
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it('should require query parameter', async () => {
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await expect(server.testExecuteTool('search_nodes', {}))
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.rejects.toThrow('search_nodes: Validation failed:\n • query: query is required');
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});
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it('should succeed with valid query', async () => {
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const result = await server.testExecuteTool('search_nodes', {
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query: 'http'
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});
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expect(result).toEqual({ results: [] });
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});
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it('should handle optional limit parameter', async () => {
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const result = await server.testExecuteTool('search_nodes', {
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query: 'http',
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limit: 10
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});
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expect(result).toEqual({ results: [] });
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});
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it('should reject invalid limit value', async () => {
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await expect(server.testExecuteTool('search_nodes', {
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query: 'http',
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limit: 'invalid'
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})).rejects.toThrow('search_nodes: Validation failed:\n • limit: limit must be a number, got string');
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});
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});
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describe('validate_node (consolidated)', () => {
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it('should require nodeType and config parameters', async () => {
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await expect(server.testExecuteTool('validate_node', {}))
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.rejects.toThrow('validate_node: Validation failed:\n • nodeType: nodeType is required\n • config: config is required');
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});
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it('should require nodeType parameter when config is provided', async () => {
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await expect(server.testExecuteTool('validate_node', { config: {} }))
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.rejects.toThrow('validate_node: Validation failed:\n • nodeType: nodeType is required');
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});
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it('should require config parameter when nodeType is provided', async () => {
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await expect(server.testExecuteTool('validate_node', { nodeType: 'nodes-base.httpRequest' }))
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.rejects.toThrow('validate_node: Validation failed:\n • config: config is required');
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});
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it('should succeed with valid parameters (full mode)', async () => {
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const result = await server.testExecuteTool('validate_node', {
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nodeType: 'nodes-base.httpRequest',
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config: { method: 'GET', url: 'https://api.example.com' },
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mode: 'full'
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});
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expect(result).toEqual({ valid: true });
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});
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it('should succeed with valid parameters (minimal mode)', async () => {
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const result = await server.testExecuteTool('validate_node', {
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nodeType: 'nodes-base.httpRequest',
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config: {},
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mode: 'minimal'
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});
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expect(result).toBeDefined();
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});
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});
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describe('get_node mode=search_properties (consolidated)', () => {
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it('should require nodeType and propertyQuery parameters', async () => {
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await expect(server.testExecuteTool('get_node', { mode: 'search_properties' }))
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.rejects.toThrow('Missing required parameters for get_node: nodeType');
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});
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it('should succeed with valid parameters', async () => {
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const result = await server.testExecuteTool('get_node', {
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nodeType: 'nodes-base.httpRequest',
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mode: 'search_properties',
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propertyQuery: 'auth'
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});
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expect(result).toEqual({ properties: [] });
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});
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it('should handle optional maxPropertyResults parameter', async () => {
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const result = await server.testExecuteTool('get_node', {
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nodeType: 'nodes-base.httpRequest',
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mode: 'search_properties',
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propertyQuery: 'auth',
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maxPropertyResults: 5
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});
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expect(result).toEqual({ properties: [] });
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});
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});
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describe('search_templates searchMode=by_nodes (consolidated)', () => {
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it('should require nodeTypes parameter for by_nodes searchMode', async () => {
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await expect(server.testExecuteTool('search_templates', { searchMode: 'by_nodes' }))
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.rejects.toThrow('nodeTypes array is required for searchMode=by_nodes');
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});
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it('should succeed with valid nodeTypes array', async () => {
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const result = await server.testExecuteTool('search_templates', {
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searchMode: 'by_nodes',
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nodeTypes: ['nodes-base.httpRequest', 'nodes-base.slack']
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});
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expect(result).toEqual({ templates: [] });
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});
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});
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describe('get_template', () => {
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it('should require templateId parameter', async () => {
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await expect(server.testExecuteTool('get_template', {}))
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.rejects.toThrow('Missing required parameters for get_template: templateId');
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});
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it('should succeed with valid templateId', async () => {
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const result = await server.testExecuteTool('get_template', {
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templateId: 123
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});
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expect(result).toEqual({ template: {} });
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});
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});
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});
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describe('Numeric Parameter Conversion', () => {
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beforeEach(() => {
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vi.spyOn(server as any, 'searchNodes').mockResolvedValue({ results: [] });
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vi.spyOn(server as any, 'searchNodeProperties').mockResolvedValue({ properties: [] });
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vi.spyOn(server as any, 'listNodeTemplates').mockResolvedValue({ templates: [] });
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vi.spyOn(server as any, 'getTemplate').mockResolvedValue({ template: {} });
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});
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describe('limit parameter conversion', () => {
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it('should reject string limit values', async () => {
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await expect(server.testExecuteTool('search_nodes', {
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query: 'test',
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limit: '15'
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})).rejects.toThrow('search_nodes: Validation failed:\n • limit: limit must be a number, got string');
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});
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it('should reject invalid string limit values', async () => {
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await expect(server.testExecuteTool('search_nodes', {
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query: 'test',
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limit: 'invalid'
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})).rejects.toThrow('search_nodes: Validation failed:\n • limit: limit must be a number, got string');
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});
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it('should use default when limit is undefined', async () => {
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const mockSearchNodes = vi.spyOn(server as any, 'searchNodes');
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await server.testExecuteTool('search_nodes', {
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query: 'test'
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});
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expect(mockSearchNodes).toHaveBeenCalledWith('test', 20, { mode: undefined });
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});
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it('should reject zero as limit due to minimum constraint', async () => {
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await expect(server.testExecuteTool('search_nodes', {
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query: 'test',
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limit: 0
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})).rejects.toThrow('search_nodes: Validation failed:\n • limit: limit must be at least 1, got 0');
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});
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});
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describe('maxPropertyResults parameter conversion (v2.26.0 consolidated)', () => {
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it('should pass numeric maxPropertyResults to searchNodeProperties', async () => {
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const mockSearchNodeProperties = vi.spyOn(server as any, 'searchNodeProperties');
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// v2.26.0: search_node_properties consolidated into get_node with mode='search_properties'
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await server.testExecuteTool('get_node', {
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nodeType: 'nodes-base.httpRequest',
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mode: 'search_properties',
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propertyQuery: 'auth',
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maxPropertyResults: 5
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});
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expect(mockSearchNodeProperties).toHaveBeenCalledWith('nodes-base.httpRequest', 'auth', 5);
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});
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it('should use default maxPropertyResults when not provided', async () => {
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const mockSearchNodeProperties = vi.spyOn(server as any, 'searchNodeProperties');
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// v2.26.0: search_node_properties consolidated into get_node with mode='search_properties'
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await server.testExecuteTool('get_node', {
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nodeType: 'nodes-base.httpRequest',
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mode: 'search_properties',
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propertyQuery: 'auth'
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});
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expect(mockSearchNodeProperties).toHaveBeenCalledWith('nodes-base.httpRequest', 'auth', 20);
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});
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});
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describe('templateLimit parameter conversion (v2.26.0 consolidated)', () => {
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it('should handle search_templates with by_nodes mode', async () => {
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// search_templates now handles list_node_templates functionality via searchMode='by_nodes'
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await expect(server.testExecuteTool('search_templates', {
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searchMode: 'by_nodes',
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nodeTypes: ['nodes-base.httpRequest'],
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limit: 5
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})).resolves.toEqual({ templates: [] });
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});
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});
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describe('templateId parameter handling', () => {
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it('should pass through numeric templateId', async () => {
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const mockGetTemplate = vi.spyOn(server as any, 'getTemplate');
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await server.testExecuteTool('get_template', {
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templateId: 123
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});
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expect(mockGetTemplate).toHaveBeenCalledWith(123, 'full');
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});
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it('should convert string templateId to number', async () => {
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const mockGetTemplate = vi.spyOn(server as any, 'getTemplate');
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await server.testExecuteTool('get_template', {
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templateId: '123'
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});
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expect(mockGetTemplate).toHaveBeenCalledWith(123, 'full');
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});
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});
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});
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describe('Tools with No Required Parameters', () => {
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beforeEach(() => {
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vi.spyOn(server as any, 'getToolsDocumentation').mockResolvedValue({ docs: 'test' });
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vi.spyOn(server as any, 'listNodes').mockResolvedValue({ nodes: [] });
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vi.spyOn(server as any, 'listAITools').mockResolvedValue({ tools: [] });
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vi.spyOn(server as any, 'getDatabaseStatistics').mockResolvedValue({ stats: {} });
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vi.spyOn(server as any, 'listTasks').mockResolvedValue({ tasks: [] });
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});
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it('should allow tools_documentation with no parameters', async () => {
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const result = await server.testExecuteTool('tools_documentation', {});
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expect(result).toEqual({ docs: 'test' });
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});
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it('should allow tools_documentation with no parameters', async () => {
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const result = await server.testExecuteTool('tools_documentation', {});
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expect(result).toBeDefined();
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// tools_documentation returns an object with documentation content
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expect(typeof result).toBe('object');
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});
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});
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describe('Error Message Quality', () => {
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it('should provide clear error messages with tool name', () => {
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expect(() => {
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server.testValidateToolParams('get_node', {}, ['nodeType']);
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}).toThrow('Missing required parameters for get_node: nodeType. Please provide the required parameters to use this tool.');
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});
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it('should list all missing parameters', () => {
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expect(() => {
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server.testValidateToolParams('validate_node', { profile: 'strict' }, ['nodeType', 'config']);
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}).toThrow('validate_node: Validation failed:\n • nodeType: nodeType is required\n • config: config is required');
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});
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it('should include helpful guidance', () => {
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try {
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server.testValidateToolParams('test_tool', {}, ['param1', 'param2']);
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} catch (error: any) {
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expect(error.message).toContain('Please provide the required parameters to use this tool');
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}
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});
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});
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describe('MCP Error Response Handling', () => {
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it('should convert validation errors to MCP error responses rather than throwing exceptions', async () => {
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// This test simulates what happens at the MCP level when a tool validation fails
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// The server should catch the validation error and return it as an MCP error response
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// Directly test the executeTool method to ensure it throws appropriately
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// The MCP server's request handler should catch these and convert to error responses
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await expect(server.testExecuteTool('get_node', {}))
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.rejects.toThrow('Missing required parameters for get_node: nodeType');
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await expect(server.testExecuteTool('search_nodes', {}))
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.rejects.toThrow('search_nodes: Validation failed:\n • query: query is required');
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await expect(server.testExecuteTool('validate_node', { nodeType: 'test' }))
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.rejects.toThrow('validate_node: Validation failed:\n • config: config is required');
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});
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it('should handle edge cases in parameter validation gracefully', async () => {
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// Test with null args (should be handled by args = args || {})
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await expect(server.testExecuteTool('get_node', null))
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.rejects.toThrow('Missing required parameters');
|
|
|
|
// Test with undefined args
|
|
await expect(server.testExecuteTool('get_node', undefined))
|
|
.rejects.toThrow('Missing required parameters');
|
|
});
|
|
|
|
it('should provide consistent error format across all tools', async () => {
|
|
// Tools using legacy validation
|
|
const legacyValidationTools = [
|
|
{ name: 'get_node', args: {}, expected: 'Missing required parameters for get_node: nodeType' },
|
|
// v2.26.0: get_node_documentation consolidated into get_node with mode='docs'
|
|
// v2.26.0: search_node_properties consolidated into get_node with mode='search_properties'
|
|
// Note: get_node_for_task removed in v2.15.0
|
|
// Note: get_node_as_tool_info removed in v2.25.0
|
|
// v2.26.0: get_property_dependencies removed (low usage)
|
|
{ name: 'get_template', args: {}, expected: 'Missing required parameters for get_template: templateId' },
|
|
];
|
|
|
|
for (const tool of legacyValidationTools) {
|
|
await expect(server.testExecuteTool(tool.name, tool.args))
|
|
.rejects.toThrow(tool.expected);
|
|
}
|
|
|
|
// Tools using new schema validation
|
|
// Updated for v2.26.0 tool consolidation
|
|
const schemaValidationTools = [
|
|
{ name: 'search_nodes', args: {}, expected: 'search_nodes: Validation failed:\n • query: query is required' },
|
|
{ name: 'validate_node', args: {}, expected: 'validate_node: Validation failed:\n • nodeType: nodeType is required\n • config: config is required' },
|
|
// list_node_templates consolidated into search_templates with searchMode='by_nodes'
|
|
];
|
|
|
|
for (const tool of schemaValidationTools) {
|
|
await expect(server.testExecuteTool(tool.name, tool.args))
|
|
.rejects.toThrow(tool.expected);
|
|
}
|
|
});
|
|
|
|
it('should validate n8n management tools parameters', async () => {
|
|
// Mock the n8n handlers to avoid actual API calls
|
|
const mockHandlers = [
|
|
'handleCreateWorkflow',
|
|
'handleGetWorkflow',
|
|
'handleGetWorkflowDetails',
|
|
'handleGetWorkflowStructure',
|
|
'handleGetWorkflowMinimal',
|
|
'handleUpdateWorkflow',
|
|
'handleDeleteWorkflow',
|
|
'handleValidateWorkflow',
|
|
'handleTriggerWebhookWorkflow',
|
|
'handleGetExecution',
|
|
'handleDeleteExecution'
|
|
];
|
|
|
|
for (const handler of mockHandlers) {
|
|
vi.doMock('../../../src/mcp/handlers-n8n-manager', () => ({
|
|
[handler]: vi.fn().mockResolvedValue({ success: true })
|
|
}));
|
|
}
|
|
|
|
vi.doMock('../../../src/mcp/handlers-workflow-diff', () => ({
|
|
handleUpdatePartialWorkflow: vi.fn().mockResolvedValue({ success: true })
|
|
}));
|
|
|
|
// Updated for v2.26.0 tool consolidation:
|
|
// - n8n_get_workflow now supports mode parameter (full, details, structure, minimal)
|
|
// - n8n_executions now handles get/list/delete via action parameter
|
|
const n8nToolsWithRequiredParams = [
|
|
{ name: 'n8n_create_workflow', args: {}, expected: 'n8n_create_workflow: Validation failed:\n • name: name is required\n • nodes: nodes is required\n • connections: connections is required' },
|
|
{ name: 'n8n_get_workflow', args: {}, expected: 'n8n_get_workflow: Validation failed:\n • id: id is required' },
|
|
{ name: 'n8n_update_full_workflow', args: {}, expected: 'n8n_update_full_workflow: Validation failed:\n • id: id is required' },
|
|
{ name: 'n8n_delete_workflow', args: {}, expected: 'n8n_delete_workflow: Validation failed:\n • id: id is required' },
|
|
{ name: 'n8n_validate_workflow', args: {}, expected: 'n8n_validate_workflow: Validation failed:\n • id: id is required' },
|
|
];
|
|
|
|
// n8n_update_partial_workflow and n8n_trigger_webhook_workflow use legacy validation
|
|
await expect(server.testExecuteTool('n8n_update_partial_workflow', {}))
|
|
.rejects.toThrow('Missing required parameters for n8n_update_partial_workflow: id, operations');
|
|
|
|
await expect(server.testExecuteTool('n8n_trigger_webhook_workflow', {}))
|
|
.rejects.toThrow('Missing required parameters for n8n_trigger_webhook_workflow: webhookUrl');
|
|
|
|
for (const tool of n8nToolsWithRequiredParams) {
|
|
await expect(server.testExecuteTool(tool.name, tool.args))
|
|
.rejects.toThrow(tool.expected);
|
|
}
|
|
});
|
|
});
|
|
}); |