I am writing a typeScript program which hits an external API. In the process of writing tests for this program, I have been unable to correctly mock-out the dependency on the external API in a way that allows me to inspect the values passed to the API itself. A simplified version of my code that hits the API …
Tag: unit-testing
Jest Unit test + received undefined
I am using Jest as my unit test framework. I am trying to mock third part npm “request” and executed my test cases, but i am receiving and the test fails The following is my code: spec.js Ctrl.js Please share your ideas. Thanks in adavnce. Answer You don’t need to use await with the callback…
Using Spies and Mocks on complex objects with Jest
I’m fairly new to testing and writing tests for a currently uncovered javaScript codebase using Jest. The code covers some niche use cases, as its conditionally injected and executed by the browser during page load. Anyway, I’m having issues mocking up custom objects. Here’s the function in …
Stubbing uuid with sinon
So I’m updating dependencies on my project and I’ve run into a snag… My unit tests were working perfectly with the below stub. However in the latest version of UUID, this seemingly has broken. Any suggestions on how to fix it? These are simplistic extracts from the code to illustrate the met…
Vue.js – Unit testing component with complex children
Let’s assume a basic Bootstrap driven HTML form as part of a custom Vue component MyForm.vue A unit test for testing if the template is rendered successfully is pretty simple This line works field.element.value works because field.element is of native type HtmlInputElement with value attribute. What if …
Get tests running time with Jest
Is there any way to know how long my tests take without doing it programmatically with Jest? To be clear, I know that if I add a variable to get the current time before each test and then log this when my test completes I’ll get this information, but I want this automatically, maybe with some Jest confi…
How to test es6 default values in jest
How do you test the given default parameter value in jest? An example having the module: Or abit more complicated function module. Answer Each expected result of the test case is specified by us, that is, we have set the expected result in advance, whether the result actually returned by the test code is cons…
How to test if component counts array length properly with Jest
I have a component that I am giving an array with objects as props to it like this: How can I test that the provided array has the correct length, for example if there are two objects in the array, the component should return two, if there is one, one, if there are none then it should return 0, how
How to mock dispatch in vueJs testing
I am currently performing unit tests on my application as seen. But I have a problem. How to mock or exploit the dispatch of Vuex ? My method to test : My unit test : I have a error message : Dispatch is not a function. Why ? Do you help me please ? I don’t understand why I had
Jest – mock a named class-export in typescript
I have a node module which exports a few classes, one of which is Client, which I use to create a client (having a few APIs as methods). I’m trying to test my module which uses this node module as a dependency using Jest. However, I’ve been unable to successfully mock the one method (say search())…