Mobile version of tech blog https://jianghushinian.cn/, covering Golang, Docker, Kubernetes and beyond.
This article explains how to write Go unit tests for HTTP handlers that depend on MySQL by using fake implementations and the gomock library to replace the store layer, demonstrating both fake object and mock approaches, code examples, and best practices for isolating external dependencies.
This article explains how to write reliable unit tests for Go HTTP applications by isolating external dependencies, covering server‑side handlers, client‑side monitoring, and using tools such as net/http/httptest, testify, and gock to create test doubles and mock HTTP services.
This article provides a detailed tutorial on Go's testing framework, covering test classifications such as unit, benchmark, example, and fuzz tests, explaining naming conventions, file organization, test execution commands, parallel testing, coverage measurement, and how to integrate these practices into robust backend development workflows.
This article introduces the Go third‑party flag package pflag, detailing its POSIX/GNU‑style features, basic and advanced usage, flag syntax, name normalization, NoOptDefVal handling, deprecation/hiding mechanisms, and how to mix it with the standard flag package.
This article explains how to use Go's standard flag package for command-line argument parsing, demonstrates various flag definitions and parsing techniques, and provides an in‑depth analysis of its source code, including flag types, syntax, internal structures, and execution flow.
This article provides an in‑depth tutorial on Viper, a full‑featured Go configuration library, covering its features, usage scenarios, loading priorities, reading from files, environment variables, command‑line flags, remote stores, and best practices for managing application settings.
This article introduces Uber's open‑source Zap library for Go, explains its high‑performance, structured, leveled logging features, demonstrates basic and advanced usage with code examples, compares production and development configurations, shows how to use SugaredLogger, customize loggers, apply options, and integrate the library into custom logging packages.
This article explores how to replicate Python's context manager behavior in Go by examining defer's delayed execution, demonstrating its limitations in loops, and presenting three solutions—anonymous functions, a WithClose helper, and a withLock-inspired pattern—to ensure timely resource release.
This article walks through a step‑by‑step Go implementation of Liu Qian’s 2024 Spring Festival Gala magic trick, explaining how to model the card‑handling algorithm with slices, shuffle, cuts, and loops, and provides complete source code and execution logs for readers to try.
