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It’s very common for our components to use state from the redux store (or to be refactored to use it eventually). Having to change our tests every tim 阅读全文
posted @ 2020-05-04 00:42
Zhentiw
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We’ve got a custom useCounter hook here and we want to make sure the increment and decrement functions it returns will update the count state that it 阅读全文
posted @ 2020-05-03 21:27
Zhentiw
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Mocking the <Redirect /> component in react-router works, but it’s imperfect because we don’t know for sure that the user will be redirected properly. 阅读全文
posted @ 2020-05-03 00:32
Zhentiw
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We have the happy path covered for our post editor component, but what happens if there’s an error in saving the user’s information? We should probabl 阅读全文
posted @ 2020-05-02 21:48
Zhentiw
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A really important aspect of TDD is the refactor phase. A critical piece to making your tests easier to maintain is using code structure and values to 阅读全文
posted @ 2020-05-02 19:35
Zhentiw
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Just make sure the date is in a range then it is fine import React from 'react' import {render, fireEvent, waitFor} from '@testing-library/react' impo 阅读全文
posted @ 2020-05-02 19:28
Zhentiw
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Once the data has been saved on the server, we’ll want to redirect the user to the home screen with react-router’s <Redirect /> component. Let’s go ah 阅读全文
posted @ 2020-05-02 19:19
Zhentiw
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We have a bit of repetition in our rerender calls here and it would be nice if we could avoid that. Let’s use the wrapper option for React Testing Lib 阅读全文
posted @ 2020-05-01 20:28
Zhentiw
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Our error boundary has some other use cases that it supports and we should try to make sure our tests cover all those use cases, so let’s add a test t 阅读全文
posted @ 2020-05-01 20:24
Zhentiw
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When testing an error boundary, your console will be filled with console.error calls from React. Those can be a real distraction from the rest of the 阅读全文
posted @ 2020-05-01 20:10
Zhentiw
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