Month: April 2022

Sometimes, we want to fix mockImplementation() not working in Jest. In this article, we’ll look…

Sometimes, we want to check that an argument to a mocked function is a function…

Sometimes, we want to mock import of JSON file with Jest. In this article, we’ll…

Sometimes, we want to fix the issue where Jest finds tests but doesn’t collect coverage.…

Sometimes, we want to fix “Unexpected token ‘import’” error while running Jest tests. In this…

Sometimes, we want to test background image styles with React testing library. In this article,…

Sometimes, we want to test for a rejected promise using Jest. In this article, we’ll…

Sometimes, we want to fix the Jest ‘No Tests found’ error. In this article, we’ll…

Sometimes, we want to fix document.getElementById() returns null on component with Jest and Enzyme. In…

Sometimes, we want to mock moment() and moment().format using Jest. In this article, we’ll look…