#DOAW16 - DevOps@work Roma 2016 - Testing your databases
Download as PPTX, PDF0 likes442 views
The document discusses the importance of unit testing in databases within the context of DevOps, emphasizing its role in improving software quality and preventing regressions. It introduces testing frameworks like TSQLt and highlights best practices to ensure effective testing processes for better application performance. The presentation also includes practical tools and resources for implementing unit tests in SQL Server environments.
#DOAW16 - DevOps@work Roma 2016 - Testing your databases
- 1. getlatestversion Testing your databases Alessandro Alpi (@suxstellino) Data Platform MVP since 2008 [email protected]
- 2. DevOps concepts Unit Testing concepts Why Unit Testing on databases Unit Testing frameworks Unit Testing solutions Conclusions Q&A Agenda
- 3. DevOps is a culture, movement or practice that emphasizes the collaboration and communication of both software developers and other information-technology(IT) professionals while automating the process of software delivery and infrastructure changes. It aims at establishing a culture and environment where building, testing, and releasing software, can happen rapidly, frequently, and more reliably (source Wikipedia) DevOps concept
- 4. We will speak about… Development teams We’re writing code and features Preventing regressions We’d like to avoid breaking changes for the customers Reducing bugs We’d like to avoid any time waste (on fixes) Improving quality We want to reach the best quality for our products
- 5. We want reach these goals Involve QA teams We want to get a team that works on Quality Assurance Implement backward compatibility We want to develop using refactoring patterns Cover with unit tests We could start writing tests, before implementing the feature Quality with productivity We can finally use tools and frameworks
- 6. What we need to reach DevOps IDE Source Control Manager (Version control system) Build server and process (also for automation) QA / Unit test process (automated) Release processes (automated and reliable) Integration OperationDevelopment
- 7. In computer programming, unit testing is a software testing method by which individual units of source code, sets of one or more computer program modules together with associated control data, usage procedures, and operating procedures are tested to determine if they are fit for use. The primary purpose of this approach is to find out bugs and prevent regressions. (source: Wikipedia) Unit Testing concept
- 8. Unit testing – why? • Focus on Mission-critical capabs • Supporting evolutionary development continuous improvement • Prevent regressions • Reduce the number of bugs • Reduce the development costs for fixes
- 9. «Fix bugs as soon as you find them» Unfixed bugs camouflage other bugs Unfixed bugs suggest that “the quality isn’t important” Discussing unfixed bugs is a waste of time Unfixed bugs lead to duplicate effort Best practice..
- 10. Unfixed bugs lead to unreliable metrics Unfixed bugs distract the entire team Unfixed bugs hinder short-notice releases Unfixed bugs lead to inaccurate estimates Fixing familiar code is easier Fixing a bug today costs less than tomorrow Lesson learnt
- 11. Executing the code on a copy of production data Manual testing T-SQL debug for checking variable values PRINT, PRINT, SELECT… Not repeatable and human errors (subjectivity) Some test cases forgotten as the code changes. Some test is made on structures with “test-unrelated” constraints which could break the test itself What we usually do when “testing”
- 12. Calculations in procedures and functions Constraints (schema) Edge cases of data DML Expected behavior of data DML Error Handling Security Standards (SQLCop) What we have to test on databases
- 13. A possible solution tSQLt (free) Simple to install Simple test schema (Assemble, Act, Assert) Framework in t-sql Can be installed as tool with Red Gate SQL Test (UI, not free) SQL Server Management Studio Using t-sql Using Red Gate SQL Test (tsqlt, not free) Integrated with SQLCop framework
- 14. Built-in tsqlt schema Classes Group of stored procedures (tests) User defined schema Conventions Naming: test* Tools Run NewTestClass/DropClass Fail/Assert Uninstall tSQLt – Structure
- 15. tSQLt – Pipeline Assemble Act Assert Create fakes Specify fakes options Populate fakes Execute commands Apply biz logic Execute proc or func Expected values Expected metadata Expected behaviors
- 16. tSQLt + SQL Server Management Studio LET’S PLAY
- 17. There is no excuse for NOT testing like any other piece of code Tools exist for testing Tools exist for generating data Testing processes really improve the quality Allows us to respect the application business requirements Conclusions
- 19. THANK YOU!
- 20. http://www.red-gate.com/products/sql-development/sql-test/ http://tsqlt.org/ http://sourceforge.net/projects/tsqlunit/ http://msdn.microsoft.com/en-us/library/dd172118(v=vs.100).aspx (VS 2010) http://blogs.msdn.com/b/ssdt/archive/2012/12/07/getting-started-with-sql-server-database-unit-testing-in- ssdt.aspx (SSDT) http://msdn.microsoft.com/en-us/library/jj851200(v=vs.103).aspx (VS 2012) http://channel9.msdn.com/Events/Visual-Studio/Launch-2013/QE107 (VS 2013) http://msdn.microsoft.com/it-it/library/dn383992.aspx (Article on CI) http://msdn.microsoft.com/en-us/library/jj907294.aspx (DLM) http://en.wikipedia.org/wiki/Unit_testing https://www.simple-talk.com/sql/t-sql-programming/getting-started-testing-databases-with-tsqlt/ http://utplsql.sourceforge.net/ (PL-SQL) https://github.com/chrisoldwood/SS-Unit Resources
- 21. My work SQL Server sotto source control Unit testing con SQL Server SQL Server Continuous Integration Putting our database under source control Unit testing on SQL Server databases with tSQLt ALM on docs.com Virtual chapter su SQL Server e source control ALM su getlatestversion.it getlatestversion
- 22. Books Database unit testing for SQL Server using tSQLt
- 24. http://bit.ly/DOAW16FEED1 Dedicateci 2 minuti del vostro tempo, e ci aiuterete a crescere e migliorare! Track Intro http://bit.ly/DOAW16FEED2 Track Avanzata