Found a total of 10000 related content
How to Test stopPropagation() in React Testing Library
Article Introduction：Introduction: Testing stopPropagation() in React
Correctly implementing stopPropagation() is vital when dealing with nested click events in React. Instead of directly verifying stopPropagation()'s call, focus on testing its outcome: does the event
2025-01-29
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810
Implementing MySQL Database Testing Frameworks
Article Introduction：To build a MySQL database testing framework, you need to select the right tools, design good use cases, automate execution and cover key scenarios. 1. The tool selection should be selected based on the team's technical stack. For example, MySQL comes with test-run for simple testing, PyTest is suitable for complex logic, JMeter focuses on performance, and DBUnit is suitable for Java ecosystem. 2. The test content should cover the table structure, SQL syntax, stored procedure results, transaction processing and performance boundaries. 3. The test data should be clean and controllable, and can be implemented through transaction rollback, fixed data insertion or mock data. 4. Automated testing should be integrated into the CI/CD process, and the test execution should be triggered through scripts and the results should be output.
2025-07-21
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832
React Basics~unit test/custom hook
Article Introduction：When I test a custom hook component, I use a renderHook imported from @testing-library/react' and an act imported fromreact-dom/test-utils'.
?src/App.tsx
import "./App.css";
import Counter from "./component/counter/Counter";
2024-11-01
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1038
React Basics~unit test/ui
Article Introduction：When I test current code, which is unit test, I use some tools. They are jest and react-testing-library.
?src/Example.js
import Greet from "./components/Greet";
const Example = () => {
return ;
};
export default Example;
?s
2024-10-20
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326
How to efficiently load Doctrine test data in Symfony application? Use Composer and liip/test-fixtures-bundle to do it!
Article Introduction：When developing Symfony applications, the loading efficiency of test data directly affects the execution speed and overall development efficiency of test cases. Recently, I encountered this problem when working on a project: every time I run a test case, the Doctrine test data is loaded for too long, which seriously affects the development progress. To solve this problem, I tried various methods and finally installed the liip/test-fixtures-bundle library through Composer, which successfully improved the loading efficiency of the test data.
2025-04-17
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533
React Basics~unit test/user event
Article Introduction：When I test a user event, I use the fireEvent function of the react-testing-library.
?src/Example.js
import Counter from "./components/Counter";
const Example = () => {
const originCount = 0;
return &
2024-10-21
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558
Troubleshooting MySQL Replication Delays and Lag
Article Introduction：Common causes and troubleshooting methods for MySQL master-slave replication delay are as follows: 1. Check the network status, use ping/traceroute to test delays and packet loss, use telnet to test port connectivity, and test the actual bandwidth through iperf; 2. Analyze the slave library processing capabilities, check the Seconds_Behind_Master field, monitor the CPU, memory, and IO usage, and enable multi-threaded replication to improve parallel capabilities; 3. Confirm the write pressure of the master library, use SHOWPROCESSLIST to check long-term write operations, optimize slow queries, and reduce replication link load; 4. Check the rationality of replication configuration, adjust sync_relay_log, relay_log_recov
2025-07-28
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925
How to test an API with Python
Article Introduction：To test the API, you need to use Python's Requests library. The steps are to install the library, send requests, verify responses, set timeouts and retry. First, install the library through pipinstallrequests; then use requests.get() or requests.post() and other methods to send GET or POST requests; then check response.status_code and response.json() to ensure that the return result is in compliance with expectations; finally, add timeout parameters to set the timeout time, and combine the retrying library to achieve automatic retry to enhance stability.
2025-07-12
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789
How to write a unit test for a Vue component that uses Vuex?
Article Introduction：Create a test-specific Vuexstore and initialize it with createStore; 2. Inject store through mount's global.plugins; 3. Use jest.fn() to simulate actions to verify calls; 4. Test the responsiveness of the component when the store state changes; 5. Optionally mock the store partially or use @testing-library/vue; finally implement isolated and reliable unit testing to ensure that the component interacts correctly with Vuex, the test is complete and maintainable.
2025-08-03
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410
How can you effectively test Go code using the built-in testing package?
Article Introduction：The key to Go code testing is to organize the test files correctly, write clear assertions, and utilize standard library tools. 1. The test file should be in the same package as the code being tested, and the file name ends with _test.go; 2. The test function must start with Test and be accompanied by a descriptive name; 3. Creating subtests with t.Run() can improve output readability and test flexibility; 4. Use the getest command when running the test, and run specific tests with the -run flag; 5. It is recommended to use a table-driven test mode to define multiple test cases through structure slices, making the test logic simpler and easier to expand. Following these practices can effectively improve the quality and efficiency of Go code testing.
2025-06-10
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764
JavaScript Testing Tool Showdown: Sinon.js vs testdouble.js
Article Introduction：When unit testing real-world code, many situations make the test difficult to write. How to check if a function is called? How to test Ajax calls? Or code using setTimeout? At this time, you need to use Test Stand-in-Replace the code to make it easier to test within difficult to test.
Sinon.js has been the actual standard for creating test stand-ins in JavaScript testing for years. It is an essential tool for any JavaScript developer who writes tests, because without it, it is nearly impossible to write tests for real applications.
Recently, a new library called testdouble.js is on the rise. It has a
2025-02-16
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1138
Unit Testing JavaScript with Jest and React Testing Library
Article Introduction：Jest and ReactTestingLibrary are the gold standard for React application testing. Jest provides test runs, assertions, _mock_ and coverage reports. ReactTestingLibrary tests components by simulating user behavior and accessibility queries. If you use CreateReactApp, both are built in. Custom configurations require installing jest, @testing-library/react and setting jest.config.js and Babel configurations; unit tests use test() and expect() to verify function logic, such as formatPrice function formatting results; component test pass r
2025-07-25
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775
Use test data in Java with DataFaker
Article Introduction：DataFaker is a library for Java that allows you to easily generate test data. This can be useful in situations where data is needed to generate tests, a demonstration, or simply to fill a database with data.
2024-11-25
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1024
API Client TDD with Mocked Responses
Article Introduction：This tutorial expands on a previous installment, focusing on building a robust and well-tested Diffbot API client library using PHPUnit and TDD (Test-Driven Development). The previous parts covered basic functionality and abstract class testing. Thi
2025-02-18
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1020
How can Vue Test Utils be used for unit and component testing in Vue applications?
Article Introduction：VueTestUtils is the officially recommended Vue component test library, which is used to mount and interact Vue components in an isolated environment to improve test coverage and code confidence. Use steps include: 1. Set up the test environment, install dependencies such as @vue/test-utils, jest or mocha and configure jest.config.js; 2. Write unit tests, mount components through mount method, verify rendering results, user interaction and event triggering; 3. Handle props and events, pass data through propsData and verify whether the events are correctly issued; 4. Test slots and subcomponents, you can pass in custom slot content, select shallow mount or complete mount subcomponents to meet the different
2025-06-19
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449
libv is two
Article Introduction：I share my experience with the "Lubuv" project, which explores the integration of the Libuv ASSINCROONA LIBRARY (C) with moon to create a simplified HTTP server. The idea was to test the abilities of Libuv without dipping deeply and
2025-01-28
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1120
Unit Testing React Components with Vitest and Testing Library
Article Introduction：First install and configure Vitest and ReactTestingLibrary, and then write tests centered on user behavior. 1. Installation dependencies: vitest, @testing-library/react, @testing-library/jest-dom, jsdom; 2. Configure the test environment to jsdom in vite.config.ts and set up setupFiles; 3. Create setupTest.ts to introduce jest-dom to extend expect; 4. Use render to render components, screen query elements, fireEvent to simulate interaction, and create vi.fn()
2025-07-30
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507
Introduction to Jest: Unit Testing, Mocking, and Asynchronous Code
Article Introduction：Introduction to Jest
Jest is a library for testing JavaScript code.
It’s an open source project maintained by Facebook, and it’s especially well suited for React code testing, although not limited to that: it can test any JavaScript code. Its
2024-11-01
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849
