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Dev

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How to test if a mocked component receives the correct props in Jest and RTL (new since React 19)

  • To test if a mocked component receives the correct props in Jest and RTL (since React 19), the approach has changed.
  • Initially, set up a simple example with a component that takes an array of names, calling a component.
  • In testing, mock the component and verify its invocation to ensure proper isolation.
  • When testing props, a new test checks if was called with the correct props in React 19.
  • In React 19, the second argument is now required to be undefined while it used to be an empty object {} pre-React 19.
  • A practical example demonstrates the usage of expect.objectContaining to accurately validate props.
  • An improvement suggestion is to utilize expect.objectContaining for testing specific props while allowing flexibility for other properties.
  • Understanding the changes in React 19 regarding the second argument for prop validation in mocked components is vital for accurate testing.
  • Ensure tests are updated post-React 19 to align with the new requirement of using undefined as the second argument for prop validation.
  • The article emphasizes the importance of adapting testing approaches to changes in React to maintain accurate component testing.

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Cloud Dev Is (Almost) Killing the Laptop — But Not the Way You Think

  • The debate over shifting to cloud development environments from local setups is ongoing in the tech industry.
  • Cloud development offers convenience but still lacks in areas like speed, offline reliability, and control compared to local development.
  • While cloud IDEs promise seamless setups, for serious projects with legacy code and complex infrastructures, local development still prevails.
  • Choosing the right tool for the right job is essential, whether it's a cloud environment or a well-tuned local machine.

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Medium

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The Perfect Fives Math Riddle

  • The news article discusses a math riddle about finding combinations of five natural numbers where their sum equals their product.
  • The author shares a strategy to approach the puzzle by starting with all numbers as 1 and then considering all numbers as 2.
  • The analysis shows that starting with all ones does not lead to a valid solution, while considering all twos results in a much greater product than the sum.
  • The article encourages readers to explore different strategies to solve the math riddle.

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Javarevisited

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Top 6 Free Data Structure and Algorithm Courses for Java and C Programmers

  • Good knowledge of data structure and algorithm is essential for programmers to excel in their careers and perform well on the job.
  • Understanding essential data structures like arrays, strings, linked lists, trees, and maps, as well as advanced structures like Tries and AVL trees, is crucial.
  • Knowing when to use the appropriate data structure and being able to calculate the CPU and memory costs of code are key skills for programmers.
  • Using the right data structure can significantly enhance the performance of an algorithm.

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🚀 From Frustration to Flow: How I Finally Mastered Debugging Like a Pro

  • Transitioned from considering debugging a frustrating task to mastering it efficiently by following a 5-step debugging mindset.
  • Realized the importance of isolating bugs rather than guessing during debugging process.
  • Utilized tools like VSCode Breakpoints, React DevTools, and essential techniques like adding minimal logs and using rubber duck debugging.
  • Acknowledged that debugging is not just a skill, but a superpower that significantly impacts a developer's career growth.

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So I Hooked My AI Agent Up with Notion. Here's What Happened.

  • Nomadev explores the futuristic concept of connecting an AI agent to Notion for automation purposes.
  • By integrating CAMEL-AI's general purpose agent with Notion's Model Context Protocol (MCP) server, users can now automate tasks within Notion through a single prompt.
  • The process involves preparing Notion for the agent by creating an integration, accessing the Notion API key, sharing a page with the agent, and configuring CAMEL's MCPToolkit to connect to Notion.
  • With this setup, users can create OWL agents that can update Notion pages based on prompts, opening up possibilities for automating various tasks like meeting summaries, cross-referencing documents, and updating planners.

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Medium

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I Do This Daily To Make $3,000+ Every Day Online

  • A successful online entrepreneur shares their daily routine focused on activities that drive traffic, generate leads, and convert sales.
  • The routine includes morning engagement with social media, content creation, marketing and promotion, engagement with the audience, and analytics and optimization.
  • Income streams involve affiliate marketing, selling digital products, sponsored content, and advertising.
  • Tips for success include consistency, providing value, and staying up-to-date with industry trends.

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Dev

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Explore generating tests with Playwright MCP Server and DeepSeek R1

  • The test case focuses on Article CRUD Operations using Playwright MCP Server and DeepSeek R1.
  • The test case includes steps for creating, editing, and deleting an article while verifying the results after each major step.
  • Pros of lacking a design pattern include readability and ease of follow, making it suitable for Proof of Concept.
  • Cons of lacking a design pattern involve a lack of abstraction and scalability for larger test suites, becoming unmaintainable quickly.

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6 Common Postgres Beginner Mistakes and Best Practices

  • Postgres is the most popular open-source relational database with almost 40 years of development, making it suitable for applications of all sizes.
  • Common beginner mistakes in Postgres include not understanding VACUUM, forgetting to close connections, writing inefficient queries, missing primary keys, overcomplicating schema design, and overlooking the importance of backups.
  • To address challenges like downtime during schema upgrades, backup complexities, and scaling issues, Neon offers a serverless PostgreSQL solution with features such as schema migration tools support, autoscaling, automatic backups, and point-in-time recovery.

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Medium

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Why Claude Opus 4 and Sonnet 4 Are the Top Coding Partners in the World?

  • Anthropic unveiled Claude Opus 4 and Sonnet 4 at its developer conference, challenging competitors in AI coding solutions like OpenAI's GPT-4 and Google's Gemini.
  • Claude Opus 4 excels in sustained coding and agentic workflows, generating code autonomously for extended periods with parallel tool execution capabilities.
  • Claude Sonnet 4 offers faster response times, improved instruction following, and concise thinking mode gains, addressing the needs of developers for reliable coding assistance.
  • Both Opus 4 and Sonnet 4 by Anthropic feature hybrid reasoning, seamless task switching, and coherence across dialogues, ensuring industry standards in responsible AI deployment.

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Dev

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Mastering Testing in Go: Best Practices

  • Testing is crucial for reliable software, and Go paired with GoFr framework offers powerful tools for streamlined testing workflows.
  • GoFr enhances testing benefits by providing unified mocking, declarative expectations, built-in HTTP testing utilities, and cross-service dependency management.
  • Embracing Table-Driven Tests in Go allows validating multiple scenarios with clear separation of test setup and assertions.
  • Leveraging Dependency Injection via Context in GoFr helps isolate components for true unit testing with easy mock configuration.
  • Isolating tests with fresh instances in GoFr prevents test pollution between cases by initializing new app instances per test.
  • Testing edge cases and failure modes in GoFr ensures resilience under real-world conditions, including scenarios like database failures and network timeouts.
  • Avoiding global state in testing ensures determinism and reproducibility, exemplified by GoFr's containerized approach for clean resource handling.
  • Validating HTTP contracts in GoFr ensures API spec compliance through tests covering HTTP status codes, response headers, JSON schema, and error formats.
  • Benchmarking critical paths in GoFr helps identify performance bottlenecks early, such as database query performance and concurrent request handling.
  • GoFr testing features include unified mock container, declarative expectations, HTTP service mocking, automatic validation, and contextual logging for efficient testing.

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WebSocket Broadcasting with hyperlane

  • The hyperlane framework supports WebSocket protocol natively, simplifying WebSocket request handling for developers.
  • Server-side implementations of both point-to-point and broadcast messaging are demonstrated using hyperlane.
  • Broadcasting is implemented using tokio::broadcast, enabling multiple clients to share a message channel in server broadcast mode.
  • Hyperlane provides a unified interface for handling WebSocket messages, making real-time WebSocket-based service development easier.

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I built open-source app to stop micromanaging my finance

  • A developer shared their experience of trying various finance tracker apps but found them burdensome due to the need for regular input.
  • Realizing the unnecessary need for micromanaging transactions, they created a simple Google Spreadsheet to record their savings monthly or at longer intervals.
  • Impressed with the simplicity and effectiveness of the spreadsheet method, they transitioned the logic into an open-source Android app stored locally on the device.
  • The app allows users to create a savings notepad, store data on their device, and offers the option for further analysis using tools like spreadsheets.

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Medium

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Is the Tech Market Collapsing for Data Analysts?

  • Data analysis trend surged during COVID-19 with major companies and universities offering courses on Data Analytics.
  • Post-COVID, the market for Data Analysts became saturated quickly, leading to a collapse in the demand for this role.
  • Trend shifted towards the hype of Data Scientists in specific fields, with each industry having its own specialized analysts.
  • Continuous learning, adaptation to new tools and technologies, and skill set polishing are crucial for professionals in the data analysis field.

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Dev

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Testing Blockchains: What to Watch Out For

  • Testing blockchains involves understanding the complexities of distributed architectures and the unique challenges they pose.
  • Key areas to focus on during blockchain testing include transaction integrity, consensus mechanisms, data persistence, security, scalability, and load testing.
  • Examples of well-structured blockchains for testing and QA purposes include Ethereum, WhiteBIT Blockchain, and Avalanche.
  • Final tips for blockchain QA engineers include using fuzz testing for smart contracts, validating edge cases in transaction lifecycles, testing in a real node environment, and monitoring logs for subtle bugs.

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