Practical writing about QA, automation testing and software engineering.https://duyqa.blog/https://duyqa.blog/en/blog/changing-mindset-key-to-test-automation/https://duyqa.blog/en/blog/changing-mindset-key-to-test-automation/Moving from manual to automation starts with rethinking tools, ROI, framework design and how the team works together.Wed, 19 Aug 2026 00:00:00 GMTseriesautomation-testingmanual-testingtest-frameworkqaVăn Thành Duyhttps://duyqa.blog/en/blog/ai-in-qa-who-pays-the-token-bill/https://duyqa.blog/en/blog/ai-in-qa-who-pays-the-token-bill/Playwright MCP and AI agents look great in demos, but token cost, review, retries and operations decide whether a QA workflow has any ROI.Sun, 16 Aug 2026 00:00:00 GMTpostqaaillmautomation-testingroiVăn Thành Duyhttps://duyqa.blog/en/blog/llms-dont-read-requirements-like-testers/https://duyqa.blog/en/blog/llms-dont-read-requirements-like-testers/Why an LLM can write beautifully formatted test cases while missing contradictions, inventing test oracles and quietly legalising bugs.Sun, 16 Aug 2026 00:00:00 GMTpostqaaillmtest-analysisVăn Thành Duyhttps://duyqa.blog/en/blog/compiled-interpreted-hybrid-how-code-runs/https://duyqa.blog/en/blog/compiled-interpreted-hybrid-how-code-runs/How source code moves through compilers, interpreters and runtimes, with Hello World examples in JavaScript, TypeScript, Python, Java, Go, Rust and C++.Sun, 09 Aug 2026 00:00:00 GMTseriesprogrammingcompilerinterpreterjavajavascripttypescriptpythongorustcppVăn Thành Duyhttps://duyqa.blog/en/blog/how-playwright-auto-wait-works/https://duyqa.blog/en/blog/how-playwright-auto-wait-works/Understand Playwright auto-waiting, actionability and web-first assertions without claiming that the framework magically waits for everything.Sun, 09 Aug 2026 00:00:00 GMTinterviewinterviewplaywrightautomationqaVăn Thành Duyhttps://duyqa.blog/en/blog/write-bug-reports-developers-want-to-fix/https://duyqa.blog/en/blog/write-bug-reports-developers-want-to-fix/How to write a bug report that someone else can reproduce, understand and start fixing without having to guess what the tester meant.Sat, 08 Aug 2026 00:00:00 GMTpostqabug-reportteamworkVăn Thành Duyhttps://duyqa.blog/en/blog/git-and-gitlab-for-beginners/https://duyqa.blog/en/blog/git-and-gitlab-for-beginners/A practical handbook for Manual Testers and new QA practitioners getting started with version controlThu, 06 Aug 2026 00:00:00 GMThandbookgitgitlabqaVăn Thành Duyhttps://duyqa.blog/en/blog/test-reports/https://duyqa.blog/en/blog/test-reports/What progress reports and test completion reports need to answer so the team understands current progress, quality and risk.Tue, 24 Dec 2024 00:00:00 GMTseriesmanual-testingtest-reporttest-managementqaVăn Thành Duyhttps://duyqa.blog/en/blog/tools-for-manual-testers/https://duyqa.blog/en/blog/tools-for-manual-testers/The tool groups testers commonly use to manage tests, track bugs, call APIs, query data and collect evidence.Tue, 24 Dec 2024 00:00:00 GMTseriesmanual-testingtesting-toolstest-managementqaVăn Thành Duyhttps://duyqa.blog/en/blog/how-to-log-bugs/https://duyqa.blog/en/blog/how-to-log-bugs/What a bug report needs, how to write actual and expected results, and how severity, priority and evidence help the team handle it.Mon, 23 Dec 2024 00:00:00 GMTseriesmanual-testingbug-reportdefectqaVăn Thành Duyhttps://duyqa.blog/en/blog/write-your-first-test-case/https://duyqa.blog/en/blog/write-your-first-test-case/Turn a high-level test case into a detailed case with preconditions, test data, steps and expected results that someone else can run.Mon, 23 Dec 2024 00:00:00 GMTseriesmanual-testingtest-casetest-designqaVăn Thành Duyhttps://duyqa.blog/en/blog/high-level-test-cases-and-rtm/https://duyqa.blog/en/blog/high-level-test-cases-and-rtm/Move from requirements to high-level test cases and a Requirement Traceability Matrix to manage coverage without getting lost in individual actions.Fri, 20 Dec 2024 00:00:00 GMTseriesmanual-testingtest-casertmqaVăn Thành Duyhttps://duyqa.blog/en/blog/test-design-techniques/https://duyqa.blog/en/blog/test-design-techniques/How to apply equivalence partitioning, boundary value analysis, decision tables, state transition and basic white-box techniques.Fri, 20 Dec 2024 00:00:00 GMTseriesmanual-testingtest-designistqbqaVăn Thành Duyhttps://duyqa.blog/en/blog/types-of-software-testing/https://duyqa.blog/en/blog/types-of-software-testing/Classify functional, non-functional, confirmation and regression testing so you know what is being tested and why.Fri, 20 Dec 2024 00:00:00 GMTseriesmanual-testingtest-typesregression-testingqaVăn Thành Duyhttps://duyqa.blog/en/blog/data-driven-testing-with-robot-framework/https://duyqa.blog/en/blog/data-driven-testing-with-robot-framework/Separate test data from test cases with Test Template and DataDriver, from CSV and Excel to JSON.Thu, 19 Dec 2024 00:00:00 GMTseriesrobot-frameworkautomation-testingdata-drivenqaVăn Thành Duyhttps://duyqa.blog/en/blog/error-handling-and-debugging-robot-framework/https://duyqa.blog/en/blog/error-handling-and-debugging-robot-framework/Read logs, distinguish failures from errors, and use BuiltIn keywords to catch, continue or deliberately stop tests.Tue, 17 Dec 2024 00:00:00 GMTseriesrobot-frameworkautomation-testingdebuggingqaVăn Thành Duyhttps://duyqa.blog/en/blog/running-tests-with-robot-framework/https://duyqa.blog/en/blog/running-tests-with-robot-framework/Select tests, suites and tags from the command line; dry run, randomise, rerun failures and run in parallel with Pabot.Sat, 14 Dec 2024 00:00:00 GMTseriesrobot-frameworkautomation-testingpabotcliVăn Thành Duyhttps://duyqa.blog/en/blog/keywords-in-robot-framework/https://duyqa.blog/en/blog/keywords-in-robot-framework/Create user keywords, pass arguments, return values and hide implementation details so test cases read closer to business language.Thu, 12 Dec 2024 00:00:00 GMTseriesrobot-frameworkautomation-testingkeywordqaVăn Thành Duyhttps://duyqa.blog/en/blog/settings-in-robot-framework/https://duyqa.blog/en/blog/settings-in-robot-framework/Documentation, tags, templates, timeouts and the settings commonly used at suite, test-case and keyword level.Thu, 12 Dec 2024 00:00:00 GMTseriesrobot-frameworkautomation-testingsettingsqaVăn Thành Duyhttps://duyqa.blog/en/blog/variables-in-robot-framework/https://duyqa.blog/en/blog/variables-in-robot-framework/Scalar, list and dictionary variables, scope and precedence in Robot Framework, with runnable examples.Wed, 11 Dec 2024 00:00:00 GMTseriesrobot-frameworkautomation-testingvariablespythonVăn Thành Duyhttps://duyqa.blog/en/blog/first-test-case-with-robot-framework/https://duyqa.blog/en/blog/first-test-case-with-robot-framework/The .robot file structure, calling keywords and running a first test case with SeleniumLibrary.Mon, 09 Dec 2024 00:00:00 GMTseriesrobot-frameworkautomation-testingtest-caseseleniumVăn Thành Duyhttps://duyqa.blog/en/blog/installing-robot-framework/https://duyqa.blog/en/blog/installing-robot-framework/Install Python, Robot Framework, SeleniumLibrary and the VS Code extension before writing your first test.Mon, 09 Dec 2024 00:00:00 GMTseriesrobot-frameworkautomation-testingpythonseleniumVăn Thành Duyhttps://duyqa.blog/en/blog/library-resource-and-variable-file/https://duyqa.blog/en/blog/library-resource-and-variable-file/Three ways to share keywords and data in Robot Framework, and the right scope for each import.Mon, 09 Dec 2024 00:00:00 GMTseriesrobot-frameworkautomation-testingkeywordpythonVăn Thành Duyhttps://duyqa.blog/en/blog/setup-and-teardown-in-robot-framework/https://duyqa.blog/en/blog/setup-and-teardown-in-robot-framework/When Test Setup, Test Teardown, Suite Setup and Suite Teardown run, their scope, and the easy places to get confused.Mon, 09 Dec 2024 00:00:00 GMTseriesrobot-frameworkautomation-testingsetup-teardownqaVăn Thành Duyhttps://duyqa.blog/en/blog/what-is-robot-framework/https://duyqa.blog/en/blog/what-is-robot-framework/How Robot Framework approaches keyword-driven automation testing, and which parts the framework actually provides.Sun, 08 Dec 2024 00:00:00 GMTseriesrobot-frameworkautomation-testingpythonqaVăn Thành Duyhttps://duyqa.blog/en/blog/software-testing-process/https://duyqa.blog/en/blog/software-testing-process/A test process moving from planning, monitoring, analysis, design, implementation and execution to completion in a sprint.Fri, 29 Nov 2024 00:00:00 GMTseriesmanual-testingtest-processistqbqaVăn Thành Duyhttps://duyqa.blog/en/blog/read-and-clarify-requirements/https://duyqa.blog/en/blog/read-and-clarify-requirements/How testers read functional and UI requirements and ask clarifying questions before writing test cases.Thu, 28 Nov 2024 00:00:00 GMTseriesmanual-testingrequirementtest-analysisqaVăn Thành Duyhttps://duyqa.blog/en/blog/writing-a-test-plan/https://duyqa.blog/en/blog/writing-a-test-plan/How a Test Plan agrees testing scope, resources, schedule, risks and stop conditions.Mon, 25 Nov 2024 00:00:00 GMTseriesmanual-testingtest-plantest-managementqaVăn Thành Duyhttps://duyqa.blog/en/blog/levels-of-software-testing/https://duyqa.blog/en/blog/levels-of-software-testing/Distinguish component, integration, system and acceptance testing by their object, objective and participants.Sun, 24 Nov 2024 00:00:00 GMTseriesmanual-testingtesting-levelsistqbqaVăn Thành Duyhttps://duyqa.blog/en/blog/error-defect-and-failure/https://duyqa.blog/en/blog/error-defect-and-failure/Distinguish root cause, error, defect, failure, severity and priority through real situations in software projects.Sat, 23 Nov 2024 00:00:00 GMTseriesmanual-testingsoftware-testingistqbqadefectVăn Thành Duyhttps://duyqa.blog/en/blog/agile-and-waterfall/https://duyqa.blog/en/blog/agile-and-waterfall/How Waterfall and Agile apply the SDLC to a project, and what a tester does in a Scrum sprint.Fri, 22 Nov 2024 00:00:00 GMTseriesmanual-testingagilescrumqaVăn Thành Duyhttps://duyqa.blog/en/blog/software-development-life-cycle-explained/https://duyqa.blog/en/blog/software-development-life-cycle-explained/The stages of the SDLC, what development models are for, and where testing enters the software life cycle.Fri, 22 Nov 2024 00:00:00 GMTseriesmanual-testingsoftware-testingsdlcqaVăn Thành Duyhttps://duyqa.blog/en/blog/what-is-software-testing/https://duyqa.blog/en/blog/what-is-software-testing/What software testing does, why teams need testers, and the seven testing principles to understand before going further.Fri, 22 Nov 2024 00:00:00 GMTseriesmanual-testingsoftware-testingistqbqaVăn Thành Duy