unit-testing – Page 3

stubbing a function using jest

January 3, 2024 by Tarik

With jest you should use jest.spyOn: jest .spyOn(jQuery, “ajax”) .mockImplementation(({ success }) => success([ 1, 2, 3 ])); Full example: const spy = jest.fn(); const payload = [1, 2, 3]; jest .spyOn(jQuery, “ajax”) .mockImplementation(({ success }) => success(payload)); jQuery.ajax({ url: “https://example.api”, success: data => spy(data) }); expect(spy).toHaveBeenCalledTimes(1); expect(spy).toHaveBeenCalledWith(payload); You can try live example on codesandbox: … Read more

In Castle Windsor 3, override an existing component registration in a unit test

January 1, 2024 by Tarik

There are two things that you have to do to create an overriding instance: Assign it a unique name Call the IsDefault method So to get the example to work: this.WindsorContainer.Register( Component.For<IMediaPlayerProxyFactory>() .Instance(mockMediaPlayerProxyFactory) .IsDefault() .Named(“OverridingFactory”) ); Because I plan to use this overriding patten in many tests, I’ve created my own extension method: public static … Read more

Ignore code blocks in Golang test coverage calculation

December 28, 2023 by Tarik

One way to do it would be to put the functions you don’t want tested in a separate go file, and use a build tag to keep it from being included during tests. For example, I do this sometimes with applications where I have a main.go file with the main function, maybe a usage function, … Read more

How to test Gulp tasks

December 28, 2023 by Tarik

My approach is to create a test instance and use exec and yeoman-assert. Though it feels more like an integration test, I find it helpful to be sure the tasks run properly (my use case being a yeoman-generator). Some (mocha) example: ‘use strict’; var path = require(‘path’); var helpers = require(‘yeoman-generator’).test; var assert = require(‘yeoman-generator’).assert; … Read more

Good literature on unit testing? [closed]

December 27, 2023 by Tarik

The Art Of Unit Testing

Is there an MSTest equivalent to NUnit’s Explicit Attribute?

December 27, 2023 by Tarik

No, the closest you will get is with the [Ignore] attribute. However, MSTest offers other ways of disabling or enabling tests using Test Lists. Whether you like them or not, Test Lists are the recommended way to select tests in MSTest.

Is there anyway to merge cobertura coverage xml reports together?

December 26, 2023 by Tarik

The last release of ReportGenerator can merge cobertura files. You can install it from nuget usage: reportgenerator “-reports:target\*\*.xml” “-targetdir:C:\report” -reporttypes:Cobertura A file Corbertura.xml is generated in the targetdir directory You can use the dotnet core version to use it on linux or mac

Best unit testing framework for Clojure?

December 25, 2023 by Tarik

I wrote clojure.test, and I am working on a new framework, lazytest, with a more functional style.

How to extract Left or Right easily from Either type in Dart (Dartz)

December 23, 2023 by Tarik

Ok here the solutions of my problems: To extract/retrieve the data final Either<ServerException, TokenModel> result = await repository.getToken(…); result.fold( (exception) => DoWhatYouWantWithException, (tokenModel) => DoWhatYouWantWithModel ); //Other way to ‘extract’ the data if (result.isRight()) { final TokenModel tokenModel = result.getOrElse(null); } To test the exception //You can extract it from below, or test it directly … Read more

How many unit tests should I write per function/method?

December 22, 2023 by Tarik

One test per check and super descriptive names, per instance: @Test public void userCannotVoteDownWhenScoreIsLessThanOneHundred() { … } Both only one assertion and using good names gives me a better report when a test fails. They scream to me: “You broke THAT rule!”.