github-action-reporter.js

// Copied from https://github.com/stefanbuck/jest-matcher/pull/2

class GitHubActionReporter {
  constructor(globalConfig, options) {
    this._globalConfig = globalConfig;
    this._options = options;
  }

  onRunComplete(contexts, results) {
    if (!process.env.GITHUB_ACTIONS) {
      return;
    }

    results.testResults.forEach((testResultItem) => {
      const testFilePath = testResultItem.testFilePath;

      testResultItem.testResults.forEach((result) => {
          if (result.status !== "failed") {
            return;
          }

          result.failureMessages.forEach(failureMessages => {
            const newLine = "%0A";
            const message = failureMessages.replace(/\n/g, newLine);
            const captureGroup = message.match(/:([0-9]+):([0-9]+)/);

            if (!captureGroup) {
              console.log('Unable to extract line number from call stack')
              return;
            }

            const [, line, col] = captureGroup;
            console.log(`::error file=${testFilePath},line=${line},col=${col}::${message}`);
          })

      });
    })
  }
}

module.exports = GitHubActionReporter;