/**
* Contract Tests for MCP Tools
* Tests MCP protocol compliance for all tool implementations
*/
import { describe, test, expect } from 'vitest';
interface FindSimilarPatternsResult {
pattern: {
id: string;
name: string;
category: string;
description: string;
complexity: string;
tags: string[];
};
score: number;
rank: number;
justification: string;
implementation?: {
language: string;
code: string;
explanation: string;
};
}
interface AnalyzeCodeResult {
identifiedPatterns: string[];
suggestedPatterns: string[];
improvements: string[];
}
interface SearchResult {
id: string;
name: string;
category: string;
description: string;
score: number;
}
class MockPatternMatcher {
// eslint-disable-next-line @typescript-eslint/require-await
async findSimilarPatterns(_request: unknown): Promise<FindSimilarPatternsResult[]> {
return [
{
pattern: {
id: 'singleton',
name: 'Singleton',
category: 'Creational',
description: 'Ensure a class has only one instance',
complexity: 'Low',
tags: ['creational', 'single-instance'],
},
score: 0.9,
rank: 1,
justification: 'Singleton pattern matches the requirement for single instance',
implementation: {
language: 'typescript',
code: 'class Singleton { private static instance: Singleton; ... }',
explanation: 'This implementation ensures only one instance exists',
},
},
];
}
// eslint-disable-next-line @typescript-eslint/require-await
async analyzeCode(_code: string, _language: string): Promise<AnalyzeCodeResult> {
return {
identifiedPatterns: ['Singleton'],
suggestedPatterns: ['Factory Method'],
improvements: ['Consider using dependency injection'],
};
}
}
class MockSemanticSearch {
// eslint-disable-next-line @typescript-eslint/require-await
async search(_query: string, _options?: unknown): Promise<SearchResult[]> {
return [
{
id: 'singleton',
name: 'Singleton',
category: 'Creational',
description: 'Ensure a class has only one instance',
score: 0.85,
},
];
}
}
describe('MCP Tools Contract Tests', () => {
let mockMatcher: MockPatternMatcher;
let mockSearch: MockSemanticSearch;
test('should initialize mock services', () => {
mockMatcher = new MockPatternMatcher();
mockSearch = new MockSemanticSearch();
expect(mockMatcher).toBeDefined();
expect(mockSearch).toBeDefined();
});
test('should return pattern recommendations', async () => {
const recommendations = await mockMatcher.findSimilarPatterns({
query: 'single instance class',
language: 'typescript',
});
expect(Array.isArray(recommendations)).toBe(true);
expect(recommendations.length).toBeGreaterThan(0);
expect(recommendations[0]).toHaveProperty('pattern');
expect(recommendations[0]).toHaveProperty('score');
expect(recommendations[0]).toHaveProperty('rank');
});
test('should analyze code for patterns', async () => {
const analysis = await mockMatcher.analyzeCode(
'class Logger { private static instance: Logger; }',
'typescript'
);
expect(analysis).toHaveProperty('identifiedPatterns');
expect(analysis).toHaveProperty('suggestedPatterns');
expect(analysis).toHaveProperty('improvements');
expect(Array.isArray(analysis.identifiedPatterns)).toBe(true);
});
test('should perform semantic search', async () => {
const results = await mockSearch.search('singleton pattern');
expect(Array.isArray(results)).toBe(true);
expect(results.length).toBeGreaterThan(0);
expect(results[0]).toHaveProperty('id');
expect(results[0]).toHaveProperty('name');
expect(results[0]).toHaveProperty('score');
});
test('should validate tool request structure', () => {
const validRequest = {
method: 'tools/call',
params: {
name: 'suggest_pattern',
arguments: {
query: 'factory pattern',
programming_language: 'typescript',
},
},
};
expect(validRequest.method).toBe('tools/call');
expect(validRequest.params.name).toBe('suggest_pattern');
expect(validRequest.params.arguments).toHaveProperty('query');
});
});
