only-changed-jest-watch-plugin/example/node_modules/jest-cli/build/reporters/coverage_reporter.js

Jest watch plugin for running either only the modified test (for TDD), or tests of dependant modules

'use strict';

Object.defineProperty(exports, '__esModule', {
  value: true
});

var _jestUtil;

function _load_jestUtil() {
  return (_jestUtil = require('jest-util'));
}

var _istanbulApi;

function _load_istanbulApi() {
  return (_istanbulApi = require('istanbul-api'));
}

var _chalk;

function _load_chalk() {
  return (_chalk = _interopRequireDefault(require('chalk')));
}

var _istanbulLibCoverage;

function _load_istanbulLibCoverage() {
  return (_istanbulLibCoverage = _interopRequireDefault(
    require('istanbul-lib-coverage')
  ));
}

var _istanbulLibSourceMaps;

function _load_istanbulLibSourceMaps() {
  return (_istanbulLibSourceMaps = _interopRequireDefault(
    require('istanbul-lib-source-maps')
  ));
}

var _jestWorker;

function _load_jestWorker() {
  return (_jestWorker = _interopRequireDefault(require('jest-worker')));
}

var _base_reporter;

function _load_base_reporter() {
  return (_base_reporter = _interopRequireDefault(require('./base_reporter')));
}

var _path;

function _load_path() {
  return (_path = _interopRequireDefault(require('path')));
}

var _glob;

function _load_glob() {
  return (_glob = _interopRequireDefault(require('glob')));
}

function _interopRequireDefault(obj) {
  return obj && obj.__esModule ? obj : {default: obj};
}

function _asyncToGenerator(fn) {
  return function() {
    var gen = fn.apply(this, arguments);
    return new Promise(function(resolve, reject) {
      function step(key, arg) {
        try {
          var info = gen[key](arg);
          var value = info.value;
        } catch (error) {
          reject(error);
          return;
        }
        if (info.done) {
          resolve(value);
        } else {
          return Promise.resolve(value).then(
            function(value) {
              step('next', value);
            },
            function(err) {
              step('throw', err);
            }
          );
        }
      }
      return step('next');
    });
  };
}
/**
 * Copyright (c) 2014-present, Facebook, Inc. All rights reserved.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 *
 *
 */

const FAIL_COLOR = (_chalk || _load_chalk()).default.bold.red;
const RUNNING_TEST_COLOR = (_chalk || _load_chalk()).default.bold.dim;

class CoverageReporter extends (_base_reporter || _load_base_reporter())
  .default {
  constructor(globalConfig) {
    super();
    this._coverageMap = (
      _istanbulLibCoverage || _load_istanbulLibCoverage()
    ).default.createCoverageMap({});
    this._globalConfig = globalConfig;
    this._sourceMapStore = (
      _istanbulLibSourceMaps || _load_istanbulLibSourceMaps()
    ).default.createSourceMapStore();
  }

  onTestResult(test, testResult, aggregatedResults) {
    if (testResult.coverage) {
      this._coverageMap.merge(testResult.coverage);
      // Remove coverage data to free up some memory.
      delete testResult.coverage;

      Object.keys(testResult.sourceMaps).forEach(sourcePath => {
        let inputSourceMap;
        try {
          const coverage = this._coverageMap.fileCoverageFor(sourcePath);

          var _coverage$toJSON = coverage.toJSON();

          inputSourceMap = _coverage$toJSON.inputSourceMap;
        } finally {
          if (inputSourceMap) {
            this._sourceMapStore.registerMap(sourcePath, inputSourceMap);
          } else {
            this._sourceMapStore.registerURL(
              sourcePath,
              testResult.sourceMaps[sourcePath]
            );
          }
        }
      });
    }
  }

  onRunComplete(contexts, aggregatedResults) {
    var _this = this;

    return _asyncToGenerator(function*() {
      yield _this._addUntestedFiles(_this._globalConfig, contexts);

      var _sourceMapStore$trans = _this._sourceMapStore.transformCoverage(
        _this._coverageMap
      );

      const map = _sourceMapStore$trans.map,
        sourceFinder = _sourceMapStore$trans.sourceFinder;

      const reporter = (0,
      (_istanbulApi || _load_istanbulApi()).createReporter)();
      try {
        if (_this._globalConfig.coverageDirectory) {
          reporter.dir = _this._globalConfig.coverageDirectory;
        }

        let coverageReporters = _this._globalConfig.coverageReporters || [];
        if (
          !_this._globalConfig.useStderr &&
          coverageReporters.length &&
          coverageReporters.indexOf('text') === -1
        ) {
          coverageReporters = coverageReporters.concat(['text-summary']);
        }

        reporter.addAll(coverageReporters);
        reporter.write(map, sourceFinder && {sourceFinder: sourceFinder});
        aggregatedResults.coverageMap = map;
      } catch (e) {
        console.error(
          (_chalk || _load_chalk()).default.red(`
        Failed to write coverage reports:
        ERROR: ${e.toString()}
        STACK: ${e.stack}
      `)
        );
      }

      _this._checkThreshold(_this._globalConfig, map);
    })();
  }

  _addUntestedFiles(globalConfig, contexts) {
    var _this2 = this;

    return _asyncToGenerator(function*() {
      const files = [];

      contexts.forEach(function(context) {
        const config = context.config;
        if (
          globalConfig.collectCoverageFrom &&
          globalConfig.collectCoverageFrom.length
        ) {
          context.hasteFS
            .matchFilesWithGlob(
              globalConfig.collectCoverageFrom,
              config.rootDir
            )
            .forEach(function(filePath) {
              return files.push({
                config: config,
                path: filePath
              });
            });
        }
      });

      if (!files.length) {
        return;
      }

      if ((_jestUtil || _load_jestUtil()).isInteractive) {
        process.stderr.write(
          RUNNING_TEST_COLOR('Running coverage on untested files...')
        );
      }

      let worker;

      if (_this2._globalConfig.maxWorkers <= 1) {
        worker = require('./coverage_worker');
      } else {
        // $FlowFixMe: assignment of a worker with custom properties.
        worker = new (_jestWorker || _load_jestWorker()).default(
          require.resolve('./coverage_worker'),
          {
            exposedMethods: ['worker'],
            maxRetries: 2,
            numWorkers: _this2._globalConfig.maxWorkers
          }
        );
      }

      const instrumentation = files.map(
        (() => {
          var _ref = _asyncToGenerator(function*(fileObj) {
            const filename = fileObj.path;
            const config = fileObj.config;

            if (!_this2._coverageMap.data[filename]) {
              try {
                const result = yield worker.worker({
                  config: config,
                  globalConfig: globalConfig,
                  path: filename
                });

                if (result) {
                  _this2._coverageMap.addFileCoverage(result.coverage);

                  if (result.sourceMapPath) {
                    _this2._sourceMapStore.registerURL(
                      filename,
                      result.sourceMapPath
                    );
                  }
                }
              } catch (error) {
                console.error(
                  (_chalk || _load_chalk()).default.red(
                    [
                      `Failed to collect coverage from ${filename}`,
                      `ERROR: ${error.message}`,
                      `STACK: ${error.stack}`
                    ].join('\n')
                  )
                );
              }
            }
          });

          return function(_x) {
            return _ref.apply(this, arguments);
          };
        })()
      );

      try {
        yield Promise.all(instrumentation);
      } catch (err) {
        // Do nothing; errors were reported earlier to the console.
      }

      if ((_jestUtil || _load_jestUtil()).isInteractive) {
        (0, (_jestUtil || _load_jestUtil()).clearLine)(process.stderr);
      }

      if (worker && typeof worker.end === 'function') {
        worker.end();
      }
    })();
  }

  _checkThreshold(globalConfig, map) {
    if (globalConfig.coverageThreshold) {
      function check(name, thresholds, actuals) {
        return ['statements', 'branches', 'lines', 'functions'].reduce(
          (errors, key) => {
            const actual = actuals[key].pct;
            const actualUncovered = actuals[key].total - actuals[key].covered;
            const threshold = thresholds[key];

            if (threshold != null) {
              if (threshold < 0) {
                if (threshold * -1 < actualUncovered) {
                  errors.push(
                    `Jest: Uncovered count for ${key} (${actualUncovered})` +
                      `exceeds ${name} threshold (${-1 * threshold})`
                  );
                }
              } else if (actual < threshold) {
                errors.push(
                  `Jest: "${name}" coverage threshold for ${key} (${threshold}%) not met: ${actual}%`
                );
              }
            }
            return errors;
          },
          []
        );
      }

      const THRESHOLD_GROUP_TYPES = {
        GLOB: 'glob',
        GLOBAL: 'global',
        PATH: 'path'
      };
      const coveredFiles = map.files();
      const thresholdGroups = Object.keys(globalConfig.coverageThreshold);
      const groupTypeByThresholdGroup = {};
      const filesByGlob = {};

      const coveredFilesSortedIntoThresholdGroup = coveredFiles.reduce(
        (files, file) => {
          const pathOrGlobMatches = thresholdGroups.reduce(
            (agg, thresholdGroup) => {
              const absoluteThresholdGroup = (
                _path || _load_path()
              ).default.resolve(thresholdGroup);

              // The threshold group might be a path:

              if (file.indexOf(absoluteThresholdGroup) === 0) {
                groupTypeByThresholdGroup[thresholdGroup] =
                  THRESHOLD_GROUP_TYPES.PATH;
                return agg.concat([[file, thresholdGroup]]);
              }

              // If the threshold group is not a path it might be a glob:

              // Note: glob.sync is slow. By memoizing the files matching each glob
              // (rather than recalculating it for each covered file) we save a tonne
              // of execution time.
              if (filesByGlob[absoluteThresholdGroup] === undefined) {
                filesByGlob[absoluteThresholdGroup] = (
                  _glob || _load_glob()
                ).default
                  .sync(absoluteThresholdGroup)
                  .map(filePath =>
                    (_path || _load_path()).default.resolve(filePath)
                  );
              }

              if (filesByGlob[absoluteThresholdGroup].indexOf(file) > -1) {
                groupTypeByThresholdGroup[thresholdGroup] =
                  THRESHOLD_GROUP_TYPES.GLOB;
                return agg.concat([[file, thresholdGroup]]);
              }

              return agg;
            },
            []
          );

          if (pathOrGlobMatches.length > 0) {
            return files.concat(pathOrGlobMatches);
          }

          // Neither a glob or a path? Toss it in global if there's a global threshold:
          if (thresholdGroups.indexOf(THRESHOLD_GROUP_TYPES.GLOBAL) > -1) {
            groupTypeByThresholdGroup[THRESHOLD_GROUP_TYPES.GLOBAL] =
              THRESHOLD_GROUP_TYPES.GLOBAL;
            return files.concat([[file, THRESHOLD_GROUP_TYPES.GLOBAL]]);
          }

          // A covered file that doesn't have a threshold:
          return files.concat([[file, undefined]]);
        },
        []
      );

      const getFilesInThresholdGroup = thresholdGroup =>
        coveredFilesSortedIntoThresholdGroup
          .filter(fileAndGroup => fileAndGroup[1] === thresholdGroup)
          .map(fileAndGroup => fileAndGroup[0]);

      function combineCoverage(filePaths) {
        return filePaths
          .map(filePath => map.fileCoverageFor(filePath))
          .reduce((combinedCoverage, nextFileCoverage) => {
            if (combinedCoverage === undefined || combinedCoverage === null) {
              return nextFileCoverage.toSummary();
            }
            return combinedCoverage.merge(nextFileCoverage.toSummary());
          }, undefined);
      }

      let errors = [];

      thresholdGroups.forEach(thresholdGroup => {
        switch (groupTypeByThresholdGroup[thresholdGroup]) {
          case THRESHOLD_GROUP_TYPES.GLOBAL: {
            const coverage = combineCoverage(
              getFilesInThresholdGroup(THRESHOLD_GROUP_TYPES.GLOBAL)
            );
            if (coverage) {
              errors = errors.concat(
                check(
                  thresholdGroup,
                  globalConfig.coverageThreshold[thresholdGroup],
                  coverage
                )
              );
            }
            break;
          }
          case THRESHOLD_GROUP_TYPES.PATH: {
            const coverage = combineCoverage(
              getFilesInThresholdGroup(thresholdGroup)
            );
            if (coverage) {
              errors = errors.concat(
                check(
                  thresholdGroup,
                  globalConfig.coverageThreshold[thresholdGroup],
                  coverage
                )
              );
            }
            break;
          }
          case THRESHOLD_GROUP_TYPES.GLOB:
            getFilesInThresholdGroup(thresholdGroup).forEach(
              fileMatchingGlob => {
                errors = errors.concat(
                  check(
                    fileMatchingGlob,
                    globalConfig.coverageThreshold[thresholdGroup],
                    map.fileCoverageFor(fileMatchingGlob).toSummary()
                  )
                );
              }
            );
            break;
          default:
            // If the file specified by path is not found, error is returned.
            if (thresholdGroup !== THRESHOLD_GROUP_TYPES.GLOBAL) {
              errors = errors.concat(
                `Jest: Coverage data for ${thresholdGroup} was not found.`
              );
            }
          // Sometimes all files in the coverage data are matched by
          // PATH and GLOB threshold groups in which case, don't error when
          // the global threshold group doesn't match any files.
        }
      });

      errors = errors.filter(
        err => err !== undefined && err !== null && err.length > 0
      );

      if (errors.length > 0) {
        this.log(`${FAIL_COLOR(errors.join('\n'))}`);
        this._setError(new Error(errors.join('\n')));
      }
    }
  }

  // Only exposed for the internal runner. Should not be used
  getCoverageMap() {
    return this._coverageMap;
  }
}
exports.default = CoverageReporter;