You asked: How can I run Karma faster?

How do I make my karma run faster?

One of the quickest ways to get your tests running faster is by running your tests in parallel, with karma-parallel. This npm package splits your unit tests into multiple suites that run in parallel with each other, on different threads of your processor.

Is jest faster than karma?

Jest is 2x to 3x times faster than karma testing

The tests that took 4–5 minutes on KARMA only takes about 1–2 minutes on jest. This is particularly important when using CI-CD ( Continous Integration/Continous Delivery).

How do you run a karma test?

Testing With AngularJS Part 1: Setting up Unit Testing With Karma

  1. STEP 1: INSTALLATION. Install Karma and the necessary plugins using NPM. # Install Karma using Node npm install karma –save-dev. …
  2. STEP 2: CONFIGURATION. Create a file called karma-conf. …
  3. STEP 3: RUNNING TESTS USING THE KARMA COMMAND LINE INTERFACE. You can execute your tests using the Karma command line interface (CLI).


How can I speed up unit testing?

Unit tests can handle these functions efficiently with the help of mocks and stubs. Identifying and pushing tests to a lower level makes tests faster and reliable. Join hands with developers, review the unit-tests and add more to the unit-levels. By reviews, you can avoid test duplication in multiple layers.

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Why is karma so slow?

The problem is that Chrome starves any minimised or secondary tabs (switched tabs) of CPU cycles. Therefore, if you minimise the browser instance running the karma server, or just switch to a different tab, then the karma server is severely starved of CPU and the tests take a long time to complete.

Is TestBed slow?

Even if the tests are very simple, they run extremely slow (on avarage 1 test assetion per second). … Isolated tests, not using TestBed, run in a fraction of second.

Is jest faster than Jasmine?

We love Jest because it’s developer experience is superb, however, on our very large monorepo with ~7000+ test specs, Jest runs about 7 times slower than Jasmine.

Which is better jest or Jasmine?

Jest provides you with multiple layers on top of Jasmine. Jasmine and Jest can be categorized as “Javascript Testing Framework” tools. “Can also be used for tdd ” is the primary reason why developers consider Jasmine over the competitors, whereas “Open source” was stated as the key factor in picking Jest.

Can I use jest with angular?

The jest-preset-angular package is the tool that makes it possible to run our Angular unit tests using Jest. It includes: ts-jest , a library that allows Jest to transpile our TypeScript code in-memory before running the tests. Snapshot serializers to enable snapshot testing for our Angular components.

Is Jasmine BDD or TDD?

The current home page of Jasmine says that it’s “a behavior-driven development framework for testing JavaScript code.” So the intent of Jasmine is to be a BDD testing framework, per its authors. So, while the authors of Jasmine have intended it as a BDD testing framework, it can also be used with TDD and unit testing.

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How do I install karma?

Open the Terminal and start the karma.conf.js generation wizard by typing one of the following depending on your operating system:

  1. For macOS and Linux: ./node_modules/karma/bin/karma init.
  2. For Windows: npm install -g karma-cli. karma init.


What is Karma-Jasmine?

Karma is a tool which lets us spawn browsers and run Jasmine tests inside of them all from the command line. The results of the tests are also displayed on the command line. Karma can also watch your development files for changes and re-run the tests automatically.

How long should unit tests take to run?

The average for all 21 of these unit tests comes to 0.019785 seconds. Note the slowest test is due to it using Microsoft Moles to mock/isolate the file system. So with this example, if my unit test suite grows to 10,000 tests, it could take over 3 minutes to run.

How do I make junit run faster?

To summarise my solution is try all or some of following steps:

  1. Optimise the tests – mocks, common setup etc.
  2. Run the tests in Parallel.
  3. Get something else to run the tests for you – make it an offline task using hudson or similar.
  4. Run only the tests that need to be run – sort them into packages or use clover and bamboo.


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