A karma reporter that uses the latest istanbul 1.x APIs (with full sourcemap support) to report coverage. 

mattlewis92

karma-coverage-istanbul-reporter

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All notable changes to this project will be documented in this file. See [standard-version](https://github.com/conventional-changelog/standard-version) for commit guidelines.

# [2.1.0](https://github.com/mattlewis92/karma-coverage-istanbul-reporter/compare/v2.0.6...v2.1.0) (2019-07-24)

* **config:** support istanbul-api instrumentation configuration ([c4f7a9c](https://github.com/mattlewis92/karma-coverage-istanbul-reporter/commit/c4f7a9c)), closes [#73](https://github.com/mattlewis92/karma-coverage-istanbul-reporter/issues/73)

## [2.0.6](https://github.com/mattlewis92/karma-coverage-istanbul-reporter/compare/v2.0.5...v2.0.6) (2019-07-20)

* get source code from sourceMapStore on write report ([619d90d](https://github.com/mattlewis92/karma-coverage-istanbul-reporter/commit/619d90d)), closes [#72](https://github.com/mattlewis92/karma-coverage-istanbul-reporter/issues/72)

## [2.0.5](https://github.com/mattlewis92/karma-coverage-istanbul-reporter/compare/v2.0.4...v2.0.5) (2019-02-17)

* correctly strip source file prefixes when no webpack.context is defined ([3c48bf8](https://github.com/mattlewis92/karma-coverage-istanbul-reporter/commit/3c48bf8))

* don't double-report files with mixed slashes in their names on windows ([38087c2](https://github.com/mattlewis92/karma-coverage-istanbul-reporter/commit/38087c2))

## [2.0.4](https://github.com/mattlewis92/karma-coverage-istanbul-reporter/compare/v2.0.3...v2.0.4) (2018-09-08)

* handle source roots being undefined on windows ([8eba911](https://github.com/mattlewis92/karma-coverage-istanbul-reporter/commit/8eba911)), closes [#55](https://github.com/mattlewis92/karma-coverage-istanbul-reporter/issues/55)

## [2.0.3](https://github.com/mattlewis92/karma-coverage-istanbul-reporter/compare/v2.0.2...v2.0.3) (2018-09-01)

* update istanbuljs to 2.x ([a835e22](https://github.com/mattlewis92/karma-coverage-istanbul-reporter/commit/a835e22)), closes [#52](https://github.com/mattlewis92/karma-coverage-istanbul-reporter/issues/52)

* use correct source file path separators on windows ([938e93c](https://github.com/mattlewis92/karma-coverage-istanbul-reporter/commit/938e93c)), closes [#47](https://github.com/mattlewis92/karma-coverage-istanbul-reporter/issues/47)

## [2.0.2](https://github.com/mattlewis92/karma-coverage-istanbul-reporter/compare/v2.0.1...v2.0.2) (2018-08-24)

* files with no coverage should be preserved by default ([#54](https://github.com/mattlewis92/karma-coverage-istanbul-reporter/issues/54)) ([e5a5545](https://github.com/mattlewis92/karma-coverage-istanbul-reporter/commit/e5a5545)), closes [#53](https://github.com/mattlewis92/karma-coverage-istanbul-reporter/issues/53)

## [2.0.1](https://github.com/mattlewis92/karma-coverage-istanbul-reporter/compare/v2.0.0...v2.0.1) (2018-05-23)

* don't log errors twice when using multiple reporters ([a17b6ca](https://github.com/mattlewis92/karma-coverage-istanbul-reporter/commit/a17b6ca)), closes [#44](https://github.com/mattlewis92/karma-coverage-istanbul-reporter/issues/44)

# [2.0.0](https://github.com/mattlewis92/karma-coverage-istanbul-reporter/compare/v1.4.3...v2.0.0) (2018-05-17)

* drop support for node 4 ([26ad3af](https://github.com/mattlewis92/karma-coverage-istanbul-reporter/commit/26ad3af))

## [1.4.3](https://github.com/mattlewis92/karma-coverage-istanbul-reporter/compare/v1.4.2...v1.4.3) (2018-05-17)

* **verbose:** pass the verbose option to istanbul if set ([9473517](https://github.com/mattlewis92/karma-coverage-istanbul-reporter/commit/9473517)), closes [#43](https://github.com/mattlewis92/karma-coverage-istanbul-reporter/issues/43)

## [1.4.2](https://github.com/mattlewis92/karma-coverage-istanbul-reporter/compare/v1.4.1...v1.4.2) (2018-03-06)

* all browsers should have their own output folder when not combined ([4aad40b](https://github.com/mattlewis92/karma-coverage-istanbul-reporter/commit/4aad40b)), closes [#39](https://github.com/mattlewis92/karma-coverage-istanbul-reporter/issues/39)

## [1.4.1](https://github.com/mattlewis92/karma-coverage-istanbul-reporter/compare/v1.4.0...v1.4.1) (2018-01-24)

  "name": "karma-coverage-istanbul-reporter",

  "description": "A karma reporter that uses the latest istanbul 1.x APIs (with full sourcemap support) to report coverage.",

    "codecov": "cat coverage/lcov.info | codecov",

    "release": "standard-version && git push --follow-tags origin master",

    "url": "git+https://github.com/mattlewis92/karma-coverage-istanbul-reporter.git"

    "url": "https://github.com/mattlewis92/karma-coverage-istanbul-reporter/issues"

  "homepage": "https://github.com/mattlewis92/karma-coverage-istanbul-reporter#readme",

    "@commitlint/config-conventional": "^8.1.0",

    "istanbul-instrumenter-loader": "^3.0.1",

    "karma-phantomjs-launcher": "^1.0.2",

      "{test,tests,spec,__tests__}/fixture{s,}/**"

[![Build Status](https://travis-ci.org/mattlewis92/karma-coverage-istanbul-reporter.svg?branch=master)](https://travis-ci.org/mattlewis92/karma-coverage-istanbul-reporter)

[![codecov](https://codecov.io/gh/mattlewis92/karma-coverage-istanbul-reporter/branch/master/graph/badge.svg)](https://codecov.io/gh/mattlewis92/karma-coverage-istanbul-reporter)

[![npm version](https://badge.fury.io/js/karma-coverage-istanbul-reporter.svg)](http://badge.fury.io/js/karma-coverage-istanbul-reporter)

[![npm](https://img.shields.io/npm/dm/karma-coverage-istanbul-reporter.svg)](http://badge.fury.io/js/karma-coverage-istanbul-reporter)

[![Twitter Follow](https://img.shields.io/twitter/follow/mattlewis92_.svg)](https://twitter.com/mattlewis92_)

> A karma reporter that uses the latest istanbul 1.x APIs (with full sourcemap support) to report coverage.

This is a reporter only and does not perform the actual instrumentation of your code. Babel users should use the [istanbul babel plugin](https://github.com/istanbuljs/babel-plugin-istanbul) to instrument your code and webpack + typescript users should use the [istanbul-instrumenter-loader](https://github.com/deepsweet/istanbul-instrumenter-loader) and then use this karma reporter to do the actual reporting. See the [test config](https://github.com/mattlewis92/karma-coverage-istanbul-reporter/blob/master/test/karma.conf.js) for an e2e example of how to combine them.

npm install karma-coverage-istanbul-reporter --save-dev

    // anything named karma-* is normally auto included so you probably dont need this

    plugins: ['karma-coverage-istanbul-reporter'],

    // any of these options are valid: https://github.com/istanbuljs/istanbuljs/blob/aae256fb8b9a3d19414dcf069c592e88712c32c6/packages/istanbul-api/lib/config.js#L33-L39

      // reports can be any that are listed here: https://github.com/istanbuljs/istanbuljs/tree/aae256fb8b9a3d19414dcf069c592e88712c32c6/packages/istanbul-reports/lib

      reports: ['html', 'lcovonly', 'text-summary'],

      // base output directory. If you include %browser% in the path it will be replaced with the karma browser name

      dir: path.join(__dirname, 'coverage'),

      // Combines coverage information from multiple browsers into one report rather than outputting a report

      // if using webpack and pre-loaders, work around webpack breaking the source path

      // Omit files with no statements, no functions and no branches from the report

      // Most reporters accept additional config options. You can pass these through the `report-config` option

        // all options available at: https://github.com/istanbuljs/istanbuljs/blob/aae256fb8b9a3d19414dcf069c592e88712c32c6/packages/istanbul-reports/lib/html/index.js#L135-L137

          // outputs the report in ./coverage/html

      // anything under these percentages will cause karma to fail with an exit code of 1 if not running in watch mode

        emitWarning: false, // set to `true` to not fail the test command when thresholds are not met

      verbose: true // output config used by istanbul for debugging

      verbose: true, // output config used by istanbul for debugging

      // `instrumentation` is used to configure Istanbul API package.

        // To include `node_modules` code in the report.

- [clover](https://github.com/istanbuljs/istanbuljs/blob/aae256fb8b9a3d19414dcf069c592e88712c32c6/packages/istanbul-reports/lib/clover/index.js#L8-L9)

- [cobertura](https://github.com/istanbuljs/istanbuljs/blob/aae256fb8b9a3d19414dcf069c592e88712c32c6/packages/istanbul-reports/lib/cobertura/index.js#L9-L10)

- [html](https://github.com/istanbuljs/istanbuljs/blob/aae256fb8b9a3d19414dcf069c592e88712c32c6/packages/istanbul-reports/lib/html/index.js#L135-L137)

- [json-summary](https://github.com/istanbuljs/istanbuljs/blob/aae256fb8b9a3d19414dcf069c592e88712c32c6/packages/istanbul-reports/lib/json-summary/index.js#L8)

- [json](https://github.com/istanbuljs/istanbuljs/blob/aae256fb8b9a3d19414dcf069c592e88712c32c6/packages/istanbul-reports/lib/json/index.js#L8)

- [lcovonly](https://github.com/istanbuljs/istanbuljs/blob/aae256fb8b9a3d19414dcf069c592e88712c32c6/packages/istanbul-reports/lib/lcovonly/index.js#L8)

- [teamcity](https://github.com/istanbuljs/istanbuljs/blob/aae256fb8b9a3d19414dcf069c592e88712c32c6/packages/istanbul-reports/lib/teamcity/index.js#L9-L10)

- [text-lcov](https://github.com/istanbuljs/istanbuljs/blob/aae256fb8b9a3d19414dcf069c592e88712c32c6/packages/istanbul-reports/lib/text-lcov/index.js#L9)

- [text-summary](https://github.com/istanbuljs/istanbuljs/blob/aae256fb8b9a3d19414dcf069c592e88712c32c6/packages/istanbul-reports/lib/text-summary/index.js#L9)

- [text](https://github.com/istanbuljs/istanbuljs/blob/aae256fb8b9a3d19414dcf069c592e88712c32c6/packages/istanbul-reports/lib/text/index.js#L159-L160)

- [Original karma-coverage source](https://github.com/karma-runner/karma-coverage/blob/master/lib/reporter.js)

- [Example of using the new reporter API](https://github.com/facebook/jest/blob/master/scripts/mapCoverage.js)

- [Karma remap istanbul](https://github.com/marcules/karma-remap-istanbul)

const istanbul = require('istanbul-api');

function checkThresholds(thresholds, summary) {

  Object.keys(thresholds).forEach(key => {

function CoverageIstanbulReporter(baseReporterDecorator, logger, config) {

  // Copied from https://github.com/angular/angular-cli/pull/9529/files

  // Fixes https://github.com/mattlewis92/karma-coverage-istanbul-reporter/issues/44

  const reporterName = 'coverage-istanbul';

    config.reporters.slice(-1).pop() !== reporterName;

  const log = logger.create('reporter.coverage-istanbul');

  const coverageConfig = Object.assign({}, config.coverageIstanbulReporter);

  function addCoverage(coverageMap, browser) {

    const coverage = browserCoverage.get(browser);

    Object.keys(coverage).forEach(filename => {

      const fileCoverage = coverage[filename];

      if (fileCoverage.inputSourceMap && coverageConfig.fixWebpackSourcePaths) {

        fileCoverage.inputSourceMap = util.fixWebpackSourcePaths(

        coverageConfig.skipFilesWithNoCoverage &&

		@@ -5,2 +5,12 @@ # Change Log

		<a name="2.1.0"></a>
		# [2.1.0](https://github.com/mattlewis92/karma-coverage-istanbul-reporter/compare/v2.0.6...v2.1.0) (2019-07-24)


		### Features

		* config: support istanbul-api instrumentation configuration ([c4f7a9c](https://github.com/mattlewis92/karma-coverage-istanbul-reporter/commit/c4f7a9c)), closes [#73](https://github.com/mattlewis92/karma-coverage-istanbul-reporter/issues/73)



		<a name="2.0.6"></a>
		@@ -7,0 +17,0 @@ ## [2.0.6](https://github.com/mattlewis92/karma-coverage-istanbul-reporter/compare/v2.0.5...v2.0.6) (2019-07-20)

		{
		"name": "karma-coverage-istanbul-reporter",
		"version": "2.0.6",
		"version": "2.1.0",
		"description": "A karma reporter that uses the latest istanbul 1.x APIs (with full sourcemap support) to report coverage.",
		@@ -5,0 +5,0 @@ "main": "src/reporter.js",

		@@ -85,2 +85,3 @@ const istanbul = require('istanbul-api');
		const reportConfig = istanbul.config.loadObject({
		instrumentation: Object.assign({}, coverageConfig.instrumentation),
		verbose: coverageConfig.verbose === true,
		@@ -87,0 +88,0 @@ reporting: Object.assign({}, coverageConfig, reportConfigOverride)

		@@ -92,3 +92,9 @@ # karma-coverage-istanbul-reporter

		verbose: true // output config used by istanbul for debugging
		verbose: true, // output config used by istanbul for debugging

		// `instrumentation` is used to configure Istanbul API package.
		instrumentation: {
		// To include `node_modules` code in the report.
		'default-excludes': false
		}
		}
		@@ -95,0 +101,0 @@ });

Improved metrics