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* Output Parsers for Dev Tools
* Parse output from Jest, ESLint, and TypeScript
*/
import type {
TestResult,
LintResult,
LintFileResult,
LintMessage,
TypeScriptResult } from './types';
/**
* Parse Jest test output
*/
export function parseJestOutput(output: string, exitCode: number): TestResult {
const result: TestResult = {
testSuites: { passed: 0, failed: 0, total: 0 },
tests: { passed: 0, failed: 0, total: 0 },
failures: [],
duration: 0,
success: exitCode === 0};
// Parse test suites summary
// Format: "Test Suites: X passed, Y failed, Z total" or "Test Suites: X failed, Y passed, Z total"
const suitesLine = output.match(/Test Suites:\s*(.+?)\s*total/i)?.[1] || '';
const suitesPassed = suitesLine.match(/(\d+)\s*passed/i);
const suitesFailed = suitesLine.match(/(\d+)\s*failed/i);
const suitesTotal = output.match(/Test Suites:.*?(\d+)\s*total/i);
if (suitesTotal) {
result.testSuites.passed = suitesPassed ? parseInt(suitesPassed[1], 10) : 0;
result.testSuites.failed = suitesFailed ? parseInt(suitesFailed[1], 10) : 0;
result.testSuites.total = parseInt(suitesTotal[1], 10);
}
// Parse tests summary
// Format: "Tests: X passed, Y failed, Z total" or "Tests: X failed, Y passed, Z total"
const testsLine = output.match(/Tests:\s*(.+?)\s*total/i)?.[1] || '';
const testsPassed = testsLine.match(/(\d+)\s*passed/i);
const testsFailed = testsLine.match(/(\d+)\s*failed/i);
const testsTotal = output.match(/Tests:.*?(\d+)\s*total/i);
if (testsTotal) {
result.tests.passed = testsPassed ? parseInt(testsPassed[1], 10) : 0;
result.tests.failed = testsFailed ? parseInt(testsFailed[1], 10) : 0;
result.tests.total = parseInt(testsTotal[1], 10);
}
// Parse snapshots if present
const snapshotsMatch = output.match(/Snapshots:\s*(?:(\d+)\s*passed,?\s*)?(?:(\d+)\s*failed,?\s*)?(\d+)\s*total/i);
if (snapshotsMatch) {
result.snapshots = {
passed: parseInt(snapshotsMatch[1] || '0', 10),
failed: parseInt(snapshotsMatch[2] || '0', 10),
total: parseInt(snapshotsMatch[3] || '0', 10)};
}
// Parse duration
// Format: "Time: X.XXs" or "Time: Xm Xs"
const timeMatch = output.match(/Time:\s*([\d.]+)\s*s/i);
if (timeMatch) {
result.duration = parseFloat(timeMatch[1]) * 1000;
}
// Parse failures
// Look for FAIL blocks and extract test names and messages
const failureBlocks = output.split(/FAIL\s+/);
for (let i = 1; i < failureBlocks.length; i++) {
const block = failureBlocks[i];
const lines = block.split('\n');
const suiteName = lines[0]?.trim() || 'Unknown Suite';
// Find individual test failures
const failureMatches = block.matchAll(/✕\s+(.+?)(?:\s+\((\d+)\s*ms\))?$/gm);
for (const match of failureMatches) {
const testName = match[1].trim();
// Try to find the error message for this test
const errorMatch = block.match(new RegExp(`${escapeRegex(testName)}[\\s\\S]*?Error:([^\\n]+)`));
const message = errorMatch ? errorMatch[1].trim() : 'Test failed';
result.failures.push({
testName,
suiteName,
message});
}
}
return result;
}
/**
* Parse ESLint JSON output
*/
export function parseEslintOutput(output: string, exitCode: number): LintResult {
const result: LintResult = {
errorCount: 0,
warningCount: 0,
fixableErrorCount: 0,
fixableWarningCount: 0,
files: [],
success: exitCode === 0};
// Try to parse as JSON first (if run with --format json)
try {
const jsonOutput = JSON.parse(output);
if (Array.isArray(jsonOutput)) {
for (const file of jsonOutput) {
const fileResult: LintFileResult = {
filePath: file.filePath,
messages: file.messages.map((msg: LintMessage) => ({
line: msg.line,
column: msg.column,
severity: msg.severity,
message: msg.message,
ruleId: msg.ruleId})),
errorCount: file.errorCount,
warningCount: file.warningCount};
result.files.push(fileResult);
result.errorCount += file.errorCount;
result.warningCount += file.warningCount;
result.fixableErrorCount += file.fixableErrorCount || 0;
result.fixableWarningCount += file.fixableWarningCount || 0;
}
return result;
}
} catch {
// Not JSON, parse text output
}
// Parse text output format
// Format: "/path/to/file.ts"
// " line:col error/warning message rule-id"
const fileBlocks = output.split(/\n(?=\/|[A-Z]:)/);
for (const block of fileBlocks) {
const lines = block.trim().split('\n');
if (lines.length === 0) continue;
const filePath = lines[0].trim();
if (!filePath || filePath.startsWith('✖')) continue;
const messages: LintMessage[] = [];
for (let i = 1; i < lines.length; i++) {
const line = lines[i].trim();
// Match: " 10:5 error Some message rule-id" or " 10:5 warning Some message rule-id"
const match = line.match(/^\s*(\d+):(\d+)\s+(error|warning)\s+(.+?)\s+(\S+)\s*$/);
if (match) {
const severity = match[3] === 'error' ? 2 : 1;
messages.push({
line: parseInt(match[1], 10),
column: parseInt(match[2], 10),
severity,
message: match[4],
ruleId: match[5]});
if (severity === 2) result.errorCount++;
else result.warningCount++;
}
}
if (messages.length > 0) {
result.files.push({
filePath,
messages,
errorCount: messages.filter(m => m.severity === 2).length,
warningCount: messages.filter(m => m.severity === 1).length});
}
}
// Parse summary line if present
// Format: "✖ X problems (Y errors, Z warnings)"
const summaryMatch = output.match(/✖\s*(\d+)\s*problems?\s*\((\d+)\s*errors?,\s*(\d+)\s*warnings?\)/);
if (summaryMatch) {
result.errorCount = parseInt(summaryMatch[2], 10);
result.warningCount = parseInt(summaryMatch[3], 10);
}
return result;
}
/**
* Parse TypeScript compiler output
*/
export function parseTypescriptOutput(output: string, exitCode: number): TypeScriptResult {
const result: TypeScriptResult = {
errorCount: 0,
errors: [],
success: exitCode === 0};
// Parse TypeScript errors
// Format: "src/file.ts(10,5): error TS2345: Message"
// Or: "src/file.ts:10:5 - error TS2345: Message"
const errorRegex = /^(.+?)[:(](\d+)[,:](\d+)\)?[:\s-]+error\s+(TS\d+):\s*(.+)$/gm;
let match;
while ((match = errorRegex.exec(output)) !== null) {
result.errors.push({
file: match[1].trim(),
line: parseInt(match[2], 10),
column: parseInt(match[3], 10),
code: match[4],
message: match[5].trim()});
}
result.errorCount = result.errors.length;
// Check for "Found X errors" summary
const summaryMatch = output.match(/Found\s+(\d+)\s+errors?/i);
if (summaryMatch) {
result.errorCount = parseInt(summaryMatch[1], 10);
}
return result;
}
/**
* Helper to escape regex special characters
*/
function escapeRegex(str: string): string {
return str.replace(/[.*+?^${}()|[\]\\]/g, '\\$&');
}
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