Vitest MCP Server

import { describe, it, expect, vi, beforeEach, afterEach } from 'vitest'; import { processCoverageData } from '../coverage-processor.js'; import type { RawCoverageData } from '../../types/coverage-types.js'; // Mock the project context vi.mock('../../context/project-context.js', () => ({ projectContext: { getProjectRoot: vi.fn(() => '/test/project') } })); // Mock the vitest config reader vi.mock('../vitest-config-reader.js', () => ({ getVitestCoverageThresholds: vi.fn(() => Promise.resolve(null)), checkThresholdsMet: vi.fn(() => true), getThresholdViolations: vi.fn(() => []) })); describe('coverage-processor', () => { beforeEach(() => { vi.clearAllMocks(); }); afterEach(() => { vi.restoreAllMocks(); }); describe('processCoverageData', () => { const mockRawData: RawCoverageData = { summary: { lines: { total: 100, covered: 80, skipped: 0, pct: 80 }, functions: { total: 20, covered: 15, skipped: 0, pct: 75 }, branches: { total: 40, covered: 32, skipped: 0, pct: 80 }, statements: { total: 100, covered: 80, skipped: 0, pct: 80 } }, files: { 'test.ts': { path: 'test.ts', s: { '0': 1, '1': 0, '2': 1 }, f: { '0': 1, '1': 0 }, b: { '0': [1, 0] }, statementMap: { '1': { start: { line: 5 } } }, fnMap: { '1': { name: 'uncoveredFunc', decl: { start: { line: 10 } } } }, branchMap: { '0': { loc: { start: { line: 15 } } } } } } }; const options = { target: './src' }; it('should process coverage data and calculate percentages correctly', async () => { const result = await processCoverageData(mockRawData, 'summary', options); expect(result.success).toBe(true); expect(result.coverage.lines).toBe(80); expect(result.coverage.functions).toBe(75); expect(result.coverage.branches).toBe(80); expect(result.coverage.statements).toBe(80); }); it('should not include threshold info when thresholds are not configured', async () => { const result = await processCoverageData(mockRawData, 'summary', options); expect(result.meetsThreshold).toBeUndefined(); }); it('should extract totals correctly', async () => { const result = await processCoverageData(mockRawData, 'summary', options); expect(result.totals.lines).toBe(100); expect(result.totals.functions).toBe(20); expect(result.totals.branches).toBe(40); }); it('should identify single file target', async () => { const result = await processCoverageData(mockRawData, 'summary', options); expect(result.file).toBe('test.ts'); }); it('should include uncovered items in detailed format', async () => { const result = await processCoverageData(mockRawData, 'detailed', options); expect(result.uncovered).toBeDefined(); expect(result.uncovered?.['test.ts']).toBeDefined(); expect(result.uncovered?.['test.ts'].lines).toContain(5); expect(result.uncovered?.['test.ts'].functions).toContainEqual({ name: 'uncoveredFunc', line: 10 }); expect(result.uncovered?.['test.ts'].branches).toContain(15); }); it('should not include threshold violations when thresholds are not configured', async () => { const result = await processCoverageData(mockRawData, 'detailed', options); expect(result.thresholdViolations).toBeUndefined(); }); it('should include file breakdown in detailed format', async () => { const result = await processCoverageData(mockRawData, 'detailed', options); expect(result.fileBreakdown).toBeDefined(); expect(result.fileBreakdown).toHaveLength(1); expect(result.fileBreakdown?.[0].path).toBe('test.ts'); }); it('should handle empty coverage data gracefully', async () => { const emptyData: RawCoverageData = { summary: { lines: { total: 0, covered: 0, skipped: 0, pct: 0 }, functions: { total: 0, covered: 0, skipped: 0, pct: 0 }, branches: { total: 0, covered: 0, skipped: 0, pct: 0 }, statements: { total: 0, covered: 0, skipped: 0, pct: 0 } }, files: {} }; const result = await processCoverageData(emptyData, 'summary', options); expect(result.success).toBe(true); expect(result.coverage.lines).toBe(0); }); it('should throw error for malformed data', async () => { const invalidData = {} as RawCoverageData; await expect(processCoverageData(invalidData, 'summary', options)) .rejects.toThrow('Failed to process coverage data'); }); }); });