CODEWITHSUNDEEP
reactjsjestjs
Anurag Mishra
Anurag Mishra

Reputation: 699

How to write unit test case for a function in jest React?

I have created a function in my component. I want to know how can I write unit test cases for that function.

component code is - 

const Test = () => {
   if(props.Test) {
     props.Test();
   }
}

my Test code is - 

const Test =() => {
console.log("hi");
}

and then pass this Test function into my component. I am getting code coverage is not done in this function. So how to achieve code coverage for this function ?

I am passing a function named Test in this component. I need to check if I am getting this component in props then execute this function. So how Can I write unit test cases for this function in jest ?

Upvotes: 0

Views: 2671

Answers (1)

MorKadosh
MorKadosh

Reputation: 6006

First mock the function, for instance:

const mockTest = jest.fn();

Then pass it as a prop to your component, and test if it was called:

expect(mockTest).toHaveBeenCalled();

More on that: https://jestjs.io/docs/en/mock-functions.html

Upvotes: 1

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