jest-junit/utils/buildJsonResults.js

A jest reporter that generates junit xml files

'use strict';

const stripAnsi = require('strip-ansi');
const constants = require('../constants/index');
const path = require('path');


// Wrap the varName with template tags
const toTemplateTag = function (varName) {
  return "{" + varName + "}";
}

// Replaces var using a template string or a function.
// When strOrFunc is a template string replaces {varname} with the value from the variables map.
// When strOrFunc is a function it returns the result of the function to which the variables are passed.
const replaceVars = function (strOrFunc, variables) {
  if (typeof strOrFunc === 'string') {
    let str = strOrFunc;
    Object.keys(variables).forEach((varName) => {
      str = str.replace(toTemplateTag(varName), variables[varName]);
    });
    return str;
  } else {
    const func = strOrFunc;
    const resolvedStr = func(variables);
    if (typeof resolvedStr !== 'string') {
      throw new Error('Template function should return a string');
    }
    return resolvedStr;
  }
};

const executionTime = function (startTime, endTime) {
  return (endTime - startTime) / 1000;
}

module.exports = function (report, appDirectory, options) {
  // Generate a single XML file for all jest tests
  let jsonResults = {
    'testsuites': [{
      '_attr': {
        'name': options.suiteName,
        'tests': 0,
        'failures': 0,
        // Overall execution time:
        // Since tests are typically executed in parallel this time can be significantly smaller
        // than the sum of the individual test suites
        'time': executionTime(report.startTime, Date.now())
      }
    }]
  };

  // Iterate through outer testResults (test suites)
  report.testResults.forEach((suite) => {
    // Skip empty test suites
    if (suite.testResults.length <= 0) {
      return;
    }

    // If the usePathForSuiteName option is true and the
    // suiteNameTemplate value is set to the default, overrides
    // the suiteNameTemplate.
    if (options.usePathForSuiteName === 'true' &&
      options.suiteNameTemplate === toTemplateTag(constants.TITLE_VAR)) {

      options.suiteNameTemplate = toTemplateTag(constants.FILEPATH_VAR);
    }

    // Build variables for suite name
    const filepath = path.relative(appDirectory, suite.testFilePath);
    const filename = path.basename(filepath);
    const suiteTitle = suite.testResults[0].ancestorTitles[0];
    const displayName = suite.displayName;

    // Build replacement map
    let suiteNameVariables = {};
    suiteNameVariables[constants.FILEPATH_VAR] = filepath;
    suiteNameVariables[constants.FILENAME_VAR] = filename;
    suiteNameVariables[constants.TITLE_VAR] = suiteTitle;
    suiteNameVariables[constants.DISPLAY_NAME_VAR] = displayName;

    // Add <testsuite /> properties
    const suiteNumTests = suite.numFailingTests + suite.numPassingTests + suite.numPendingTests;
    const suiteExecutionTime = executionTime(suite.perfStats.start, suite.perfStats.end);

    let testSuite = {
      'testsuite': [{
        _attr: {
          name: replaceVars(options.suiteNameTemplate, suiteNameVariables),
          errors: 0, // not supported
          failures: suite.numFailingTests,
          skipped: suite.numPendingTests,
          timestamp: (new Date(suite.perfStats.start)).toISOString().slice(0, -5),
          time: suiteExecutionTime,
          tests: suiteNumTests
        }
      }]
    };

    // Update top level testsuites properties
    jsonResults.testsuites[0]._attr.failures += suite.numFailingTests;
    jsonResults.testsuites[0]._attr.tests += suiteNumTests;

    // Write stdout console output if available
    if (options.includeConsoleOutput === 'true' && suite.console && suite.console.length) {
      // Stringify the entire console object
      // Easier this way because formatting in a readable way is tough with XML
      // And this can be parsed more easily
      let testSuiteConsole = {
        'system-out': {
          _cdata: JSON.stringify(suite.console, null, 2)
        }
      };

      testSuite.testsuite.push(testSuiteConsole);
    }

    // Iterate through test cases
    suite.testResults.forEach((tc) => {
      const classname = tc.ancestorTitles.join(options.ancestorSeparator);
      const testTitle = tc.title;

      // Build replacement map
      let testVariables = {};
      testVariables[constants.FILEPATH_VAR] = filepath;
      testVariables[constants.FILENAME_VAR] = filename;
      testVariables[constants.CLASSNAME_VAR] = classname;
      testVariables[constants.TITLE_VAR] = testTitle;
      testVariables[constants.DISPLAY_NAME_VAR] = displayName;

      let testCase = {
        'testcase': [{
          _attr: {
            classname: replaceVars(options.classNameTemplate, testVariables),
            name: replaceVars(options.titleTemplate, testVariables),
            time: tc.duration / 1000
          }
        }]
      };

      if (options.addFileAttribute === 'true') {
        testCase.testcase[0]._attr.file = filepath;
      }

      // Write out all failure messages as <failure> tags
      // Nested underneath <testcase> tag
      if (tc.status === 'failed') {
        tc.failureMessages.forEach((failure) => {
          testCase.testcase.push({
            'failure': stripAnsi(failure)
          });
        })
      }

      // Write out a <skipped> tag if test is skipped
      // Nested underneath <testcase> tag
      if (tc.status === 'pending') {
        testCase.testcase.push({
          skipped: {}
        });
      }

      testSuite.testsuite.push(testCase);
    });

    jsonResults.testsuites.push(testSuite);
  });

  return jsonResults;
};