karma-coverage-istanbul-reporter
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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 to instrument your code and webpack + typescript users should use the istanbul-instrumenter-loader and then use this karma reporter to do the actual reporting. See the test config for an e2e example of how to combine them.
npm install karma-coverage-istanbul-reporter --save-dev
// karma.conf.js
const path = require('path');
module.exports = function(config) {
config.set({
// ... rest of karma config
// anything named karma-* is normally auto included so you probably dont need this
plugins: ['karma-coverage-istanbul-reporter'],
reporters: ['coverage-istanbul'],
// any of these options are valid: https://github.com/istanbuljs/istanbuljs/blob/aae256fb8b9a3d19414dcf069c592e88712c32c6/packages/istanbul-api/lib/config.js#L33-L39
coverageIstanbulReporter: {
// 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
// for each browser.
combineBrowserReports: true,
// if using webpack and pre-loaders, work around webpack breaking the source path
fixWebpackSourcePaths: true,
// Omit files with no statements, no functions and no branches from the report
skipFilesWithNoCoverage: true,
// Most reporters accept additional config options. You can pass these through the `report-config` option
'report-config': {
// all options available at: https://github.com/istanbuljs/istanbuljs/blob/aae256fb8b9a3d19414dcf069c592e88712c32c6/packages/istanbul-reports/lib/html/index.js#L135-L137
html: {
// outputs the report in ./coverage/html
subdir: 'html'
}
},
// enforce percentage thresholds
// anything under these percentages will cause karma to fail with an exit code of 1 if not running in watch mode
thresholds: {
emitWarning: false, // set to `true` to not fail the test command when thresholds are not met
// thresholds for all files
global: {
statements: 100,
lines: 100,
branches: 100,
functions: 100
},
// thresholds per file
each: {
statements: 100,
lines: 100,
branches: 100,
functions: 100,
overrides: {
'baz/component/**/*.js': {
statements: 98
}
}
}
},
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
}
}
});
};
MIT
FAQs
A karma reporter that uses the latest istanbul 1.x APIs (with full sourcemap support) to report coverage.
We found that karma-coverage-istanbul-reporter demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 1 open source maintainer collaborating on the project.
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