Vitest MCP Server

import { describe, it, expect, vi, beforeEach } from 'vitest'; import { VitestOutputProcessor } from '../output-processor.js'; import type { RunTestsResult, TestResultContext } from '../../tools/run-tests.js'; describe('VitestOutputProcessor', () => { let processor: VitestOutputProcessor; beforeEach(() => { processor = new VitestOutputProcessor(); vi.clearAllMocks(); }); describe('JSON parsing', () => { it('should parse valid Vitest JSON output', async () => { const validJson = '{"numTotalTests":5,"numPassedTests":3,"numFailedTests":2,"success":false,"testResults":[]}'; const result: RunTestsResult = { command: 'vitest run', success: false, exitCode: 1, stdout: validJson, stderr: '', duration: 1.5 }; const processed = await processor.process(result, 'summary', {} as TestResultContext); expect(processed.success).toBe(false); expect(processed.summary).toContain('failed'); expect(processed.testSummary.totalTests).toBe(5); expect(processed.testSummary.passed).toBe(3); expect(processed.testSummary.failed).toBe(2); }); it('should handle malformed JSON gracefully', async () => { const result: RunTestsResult = { command: 'vitest run', success: false, exitCode: 1, stdout: 'invalid json output', stderr: '', duration: 1.0 }; const processed = await processor.process(result, 'summary', {} as TestResultContext); expect(processed.testSummary.totalTests).toBe(0); expect(processed.testSummary.passed).toBe(0); expect(processed.testSummary.failed).toBe(0); }); it('should extract JSON from mixed output', async () => { const mixedOutput = ` Some console output {"numTotalTests":2,"numPassedTests":2,"numFailedTests":0,"success":true,"testResults":[]} More console output `; const result: RunTestsResult = { command: 'vitest run', success: true, exitCode: 0, stdout: mixedOutput, stderr: '', duration: 0.8 }; const processed = await processor.process(result, 'summary', {} as TestResultContext); expect(processed.success).toBe(true); expect(processed.testSummary.totalTests).toBe(2); expect(processed.testSummary.passed).toBe(2); expect(processed.testSummary.failed).toBe(0); }); }); describe('test result processing', () => { it('should process successful test runs', async () => { const jsonData = { "numTotalTests": 3, "numPassedTests": 3, "numFailedTests": 0, "success": true, "testResults": [] }; const result: RunTestsResult = { command: 'vitest run', success: true, exitCode: 0, stdout: JSON.stringify(jsonData), stderr: '', duration: 1.2 }; const processed = await processor.process(result, 'summary', {} as TestResultContext); expect(processed.success).toBe(true); expect(processed.testSummary.totalTests).toBe(3); expect(processed.testSummary.passed).toBe(3); expect(processed.testSummary.failed).toBe(0); expect(processed.testResults).toBeUndefined(); // No failures to report }); it('should process failed tests with detailed format', async () => { const jsonData = { "numTotalTests": 2, "numPassedTests": 1, "numFailedTests": 1, "success": false, "testResults": [ { "name": "/path/to/test.ts", "status": "failed", "assertionResults": [ { "title": "should work", "fullName": "test suite should work", "status": "failed", "failureMessages": ["AssertionError: expected 4 to be 5"] } ] } ] }; const result: RunTestsResult = { command: 'vitest run', success: false, exitCode: 1, stdout: JSON.stringify(jsonData), stderr: '', duration: 1.8 }; const processed = await processor.process(result, 'detailed', {} as TestResultContext); expect(processed.success).toBe(false); expect(processed.testSummary.failed).toBe(1); expect(processed.testResults?.failedTests).toBeDefined(); expect(processed.testResults?.failedTests?.[0].tests[0]).toMatchObject({ testName: "test suite should work", errorType: "AssertionError" }); }); it('should handle skipped tests', async () => { const jsonData = { "numTotalTests": 3, "numPassedTests": 2, "numFailedTests": 0, "numSkippedTests": 1, "success": true, "testResults": [ { "name": "/path/to/test.ts", "status": "passed", "assertionResults": [ { "title": "should be skipped", "fullName": "test suite should be skipped", "status": "skipped" } ] } ] }; const result: RunTestsResult = { command: 'vitest run', success: true, exitCode: 0, stdout: JSON.stringify(jsonData), stderr: '', duration: 0.5 }; const processed = await processor.process(result, 'summary', {} as TestResultContext); expect(processed.testSummary.skipped).toBe(1); expect(processed.testResults?.skippedTests).toBeDefined(); expect(processed.testResults?.skippedTests?.[0].tests[0].testName).toBe("test suite should be skipped"); }); }); describe('error handling', () => { it('should handle empty output', async () => { const result: RunTestsResult = { command: 'vitest run', success: false, exitCode: 1, stdout: '', stderr: '', duration: 0.1 }; const processed = await processor.process(result, 'summary', {} as TestResultContext); expect(processed.testSummary.totalTests).toBe(0); expect(processed.success).toBe(false); }); it('should preserve execution metadata', async () => { const result: RunTestsResult = { command: 'vitest run --reporter=json', success: true, exitCode: 0, stdout: '{"numTotalTests":1,"numPassedTests":1,"numFailedTests":0,"success":true,"testResults":[]}', stderr: '', duration: 2.5 }; const processed = await processor.process(result, 'detailed', {} as TestResultContext); expect(processed.command).toBe('vitest run --reporter=json'); expect(processed.format).toBe('detailed'); expect(processed.executionTimeMs).toBe(2.5); }); }); });