SQLDay 2017 - Database Unit Tests with tSQLt
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This document discusses unit testing SQL code using the tSQLt framework. It provides an overview of tSQLt, including that it is an open source framework for running unit tests directly in a SQL database. It also summarizes some key features of tSQLt like various assertion methods, mocking dependencies using fake tables and procedures, and tools for isolating tests and debugging failures.
![SQLDay 2017
Test creation and execution
• tSQLt.NewTestClass
• tSQLt.Run [ [@testName = ] 'test name' ]
• tSQLt.RunAll](https://image.slidesharecdn.com/sqlday2017-marekmasko-databasetestingwithtsqlt-170524073818/85/SQLDay-2017-Database-Unit-Tests-with-tSQLt-8-320.jpg)
![SQLDay 2017
tSQLt.Run
tSQLt.Run
’test class’
For each [test*] SP
Create record in
tSQLt.TestResult
Start TRANRun Setup SPRun test SP
ROLLBACK
Update record in
tSQLt.TestResult
Print results](https://image.slidesharecdn.com/sqlday2017-marekmasko-databasetestingwithtsqlt-170524073818/85/SQLDay-2017-Database-Unit-Tests-with-tSQLt-9-320.jpg)
![SQLDay 2017
Something went wrong?
[tSQLt].[Private_RenamedObjectLog] for the rescue!
SELECT OriginalName,
SCHEMA_NAME(schema_id) +'.'+ name AS [Name of Renamed Table],
create_date
FROM [tSQLt].[Private_RenamedObjectLog]
JOIN sys.objects
ON objectid = object_id](https://image.slidesharecdn.com/sqlday2017-marekmasko-databasetestingwithtsqlt-170524073818/85/SQLDay-2017-Database-Unit-Tests-with-tSQLt-12-320.jpg)
SQLDay 2017 - Database Unit Tests with tSQLt
- 2. Database Unit Tests with tSQLt
- 3. SQLDay 2017 About the Author Marek Maśko • Principal Database Analyst at Sabre • Working with SQL Server for ~7 years • SQL DBA, Dev & Architect • MCP since 2012 • Contact Information: Email: [email protected] LinkedIn: https://pl.linkedin.com/in/marekmasko Twitter: @MarekMasko
- 4. SQLDay 2017 Unit Tests • Take the smallest testable piece of software and test it in isolated conditions. • F.I.R.S.T Principles: – Fast – Isolated – Repeatable – Self-Validating – Thorough and Timely
- 5. SQLDay 2017 tSQLt Framework • Open Source Framework • Written in TSQL and C# (CLR) • Runs on database level • Provides various Assert methods • Allows object mocking http://tsqlt.org/ https://github.com/tSQLt-org/tSQLt
- 6. SQLDay 2017 What we get?
- 7. SQLDay 2017 Requirements • Requires CLR (SQL Server 2005 SP2 +) • tSQLt schema • Trustworthy database
- 8. SQLDay 2017 Test creation and execution • tSQLt.NewTestClass • tSQLt.Run [ [@testName = ] 'test name' ] • tSQLt.RunAll
- 9. SQLDay 2017 tSQLt.Run tSQLt.Run ’test class’ For each [test*] SP Create record in tSQLt.TestResult Start TRANRun Setup SPRun test SP ROLLBACK Update record in tSQLt.TestResult Print results
- 10. SQLDay 2017 Assertions • tSQLt.AssertEmptyTable • tSQLt.AssertEquals • tSQLt.AssertEqualsString • tSQLt.AssertEqualsTable • tSQLt.AssertEqualsTableSchema • tSQLt.AssertLike • tSQLt.AssertNotEquals • tSQLt.AssertObjectDoesNotExist • tSQLt.AssertObjectExists • tSQLt.AssertResultSetsHaveSameMetaData • tSQLt.Fail
- 11. SQLDay 2017 Isolating Dependencies Tables: • tSQLt.FakeTable • tSQLt.ApplyConstraint • tSQLt.ApplyTrigger Procedures: • tSQLt.SpyProcedure Functions: • tSQLt.FakeFunction
- 12. SQLDay 2017 Something went wrong? [tSQLt].[Private_RenamedObjectLog] for the rescue! SELECT OriginalName, SCHEMA_NAME(schema_id) +'.'+ name AS [Name of Renamed Table], create_date FROM [tSQLt].[Private_RenamedObjectLog] JOIN sys.objects ON objectid = object_id
- 13. SQLDay 2017 What else? • SqlCop by George Mastros – http://sqlcop.lessthandot.com – http://dl.dropbox.com/u/58229865/SQLCop%20Tests.zip • SQLCover Code Coverage by Ed Elliott – https://the.agilesql.club/Projects/SQLCover – https://github.com/GoEddie/SQLCover – https://github.com/danielpalme/ReportGenerator
- 14. SQLDay 2017 Problems • INSERT INTO … EXEC • Synonyms • Schema binding • Watch out for time • Exceptions from rules • Cannot run tests in parallel
- 15. SQLDay 2017 Best practices • Separate test class for each tested object • Single assertion per test • Parameters testing • Resultset schema testing • Table schema testing (prevent changes)
- 16. THANK YOU AND GOOD LUCK!