How do I use karma coverage in Istanbul reporter?

How do I run Karma-coverage in Istanbul reporter?

To activate the coverage reporter add this to your configuration file. reporters = [‘coverage’]; This will create a coverage report for every browser that the tests are run in. In addition, it will create a JSON file that outputs the intermediate data.

What is karma-coverage Istanbul reporter?

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

How do I check my karma code coverage?

To enable this, open the Karma test platform configuration file, karma. conf. js , and add the check property in the coverageReporter: key. The check property causes the tool to enforce a minimum of 80% code coverage when the unit tests are run in the project.

How do I run Karma-coverage?

To add karma-coverage definition to the configuration file

  1. Open karma. conf. …
  2. Locate the reporters definition and add coverage to the list of values in the format: reporters: [‘progress’, ‘coverage’] …
  3. Add a preprocessors definition and specify the coverage scope in the format: preprocessors: {‘**/*.js’: [‘coverage’]}


What is karma code?

Karma is essentially a tool which spawns a web server that executes source code against test code for each of the browsers connected. The results of each test against each browser are examined and displayed via the command line to the developer such that they can see which browsers and tests passed or failed.

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How do I generate a report in Istanbul?

Mocha With Istanbul: A Quick Start

  1. Step 1: Install NYC. NYC is Istanbul’s command line utility. The first thing you’ll need to do is install NYC: …
  2. Step 2: Use NYC to Call Mocha. With Istanbul installed, prepend your existing Mocha command with the NYC binary. For instance, your package.json would look like the following:


How do you use karma mocha reporter?

Install and configure the Mocha Reporter

First install the Karma Mocha reporter via npm or yarn. Next, we need to adjust our karma. conf. js by adding the karma-mocha-reporter to the plugins section as configuring mocha as the reporter.

What is a karma reporter?

Test reporter, that prints detailed results to console (similar to mocha’s spec reporter).

What is Karma Jasmine HTML?

Reporter that dynamically shows tests results at debug. You can also run a describe block, or a single test. …

How do you generate a code coverage report?

Generate the report

  1. From the main menu, select Run | Generate Coverage Report, or click. in the Coverage tool window. …
  2. In the Generate Coverage Report dialog, specify the directory in which the generated report should be stored, and optionally select the Open generated HTML in browser checkbox. …
  3. Click Save.


What is karma preprocessor?

Preprocessors in Karma allow you to do some work with your files before they get served to the browser. These are configured in the preprocessors block of the configuration file: preprocessors: { ‘**/*.

What are angular test coverage branches?

What is Branch Testing? Branch coverage is a testing method, which aims to ensure that each one of the possible branch from each decision point is executed at least once and thereby ensuring that all reachable code is executed. That is, every branch taken each way, true and false.

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What is NG test in angular?

Runs unit tests in a project. Takes the name of the project, as specified in the projects section of the angular. json workspace configuration file.

What is Istanbul in angular?

Istanbul instruments your ES5 and ES2015+ JavaScript code with line counters, so that you can track how well your unit-tests exercise your codebase. The nyc command-line-client for Istanbul works well with most JavaScript testing frameworks: tap, mocha, AVA, etc.