Code driven testing (UA)
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Talk at ITEvent 2011 http://itevent.if.ua/
![Unit test
[TestFixture]
public class CalculatorTests
{
[Test]
public void Sum_ReturnsCorrectValue()
{
var math = new Calculator();
int result = math.Sum(1, 2);
Assert.AreEqual(3, result);
}
}](https://image.slidesharecdn.com/code-driventesting-oleksandrpavlyshak-120602021614-phpapp01/85/Code-driven-testing-UA-5-320.jpg)
![Arrange/Act/Assert
[TestFixture]
public class CalculatorTests
{
[Test]
public void Sum_ReturnsCorrectValue()
{
var math = new Calculator(); // Arrange
int result = math.Sum(1, 2); // Act
Assert.AreEqual(3, result); // Assert
}
}](https://image.slidesharecdn.com/code-driventesting-oleksandrpavlyshak-120602021614-phpapp01/85/Code-driven-testing-UA-6-320.jpg)
![亟亳仆亳亶 assert/亟亳仆亳亶 verify
豫仆-亠 仗仂于亳仆亠仆 亠于舒亳 仂 仂亟仆亠
舒亰于舒 亠 于舒亢仍亳于舒
[Test]
public void Start_Test()
{
var survey = new Survey();
survey.Start();
Assert.AreEqual(SurveyState.InProgress, survey.State);
Assert.IsTrue(survey.FinishDate > survey.StartDate);
}](https://image.slidesharecdn.com/code-driventesting-oleksandrpavlyshak-120602021614-phpapp01/85/Code-driven-testing-UA-7-320.jpg)
![DEMO
[Test]
public void Start_ChangesStateToInProgress()
{
var survey = new Survey();
survey.Start();
Assert.AreEqual(SurveyState.InProgress,
survey.State);
}](https://image.slidesharecdn.com/code-driventesting-oleksandrpavlyshak-120602021614-phpapp01/85/Code-driven-testing-UA-13-320.jpg)
Code driven testing (UA)
- 1. Code-driven testing 亟亳仂: 仂亰仂弍仆亳从亳 仍亠从舒仆亟 舒于仍亳舒从, 2011 pavlyshak@gmail.com
- 2. Agenda 仂仆 Unit test 亟仄仆舒 亰舒仍亠亢仆仂亠亶, stubs 丐亠于舒仆仆 于亰舒仄仂亟亶, mocks 亊从仂 仂仂亳 亠于 Unit vs integration testing 舒从亳从亳 亠亳从亳
- 3. 丐亠于舒仆仆 仂亳仆舒 舒亰仂仄 亰 仂亰仂弍从仂 舒仗从舒仄仂 亟亳于亳仄仂 弌于仂ﾑ仄仂 亟仂仗仂仄亢仆 亰舒仂弍亳 仂仆仂仍仆 仗仂亞舒仄亳 仂仗仂仄亢仆亳亶 UI
- 4. Unit test, 于亳亰仆舒亠仆仆 仂亟 (亰舒亰于亳舒亶, 仄亠仂亟) 亊从亳亶 于亳从仍亳从舒 仆亳亶 从仂亟 仗仍 仂亞仂 仗亠亠于 仗舒于亳仍仆 亠磻亳 仗亳仗亠仆 Unit = 仄仂亟仍, 从仂仄仗仂仆亠仆 (仆从, 仄亠仂亟, 从仍舒, Unit of Work)
- 5. Unit test [TestFixture] public class CalculatorTests { [Test] public void Sum_ReturnsCorrectValue() { var math = new Calculator(); int result = math.Sum(1, 2); Assert.AreEqual(3, result); } }
- 6. Arrange/Act/Assert [TestFixture] public class CalculatorTests { [Test] public void Sum_ReturnsCorrectValue() { var math = new Calculator(); // Arrange int result = math.Sum(1, 2); // Act Assert.AreEqual(3, result); // Assert } }
- 7. 亟亳仆亳亶 assert/亟亳仆亳亶 verify 豫仆-亠 仗仂于亳仆亠仆 亠于舒亳 仂 仂亟仆亠 舒亰于舒 亠 于舒亢仍亳于舒 [Test] public void Start_Test() { var survey = new Survey(); survey.Start(); Assert.AreEqual(SurveyState.InProgress, survey.State); Assert.IsTrue(survey.FinishDate > survey.StartDate); }
- 8. Unit test framework 亳从仂仆舒仆仆 亠于 亟仆仂亞仂, 亟亠从仍从仂, 于 仆亠亞舒 亰 IDE API 亟仍 仆舒仗亳舒仆仆 亠于 于仂仄舒亳亰舒 亠亠亞仍磲 亠亰仍舒于
- 9. Unit test framework NUnit, MS Test, MBUnit, DBUnit JUnit, JWalk, TestNG, DBUnit C++test, CppUnit, Google C++ Testing Fx PyUnit
- 12. 舒仍亠亢仆仂
- 13. DEMO [Test] public void Start_ChangesStateToInProgress() { var survey = new Survey(); survey.Start(); Assert.AreEqual(SurveyState.InProgress, survey.State); }
- 14. 舒仍亠亢仆仂 Survey 亰舒仍亠亢亳 于亟 EmailSender 亠 仂亠仄仂 于亟亳仍舒亳 仗舒于亢仆 仍亳亳 弌于仂ﾑ仄仂 stub 于仆 弌于仂ﾑ仄仂 stub 舒于仂仄舒亳仆仂 亠 亠 亠仄仂 舒仆! Assert.AreEqual(SurveyState.InProgress, survey.State);
- 15. Interaction testing 仂亠弍舒 亠于舒亳 于亰舒仄仂亟 弌于仂ﾑ仄仂 mock 于仆 弌于仂ﾑ仄仂 mock 舒于仂仄舒亳仆仂 亟亳仆 mock 仆舒 亠 丐亠仄仂 仆亠 舒仆, 舒 于亰舒仄仂亟! mockEmailSender.Verify();
- 16. Stubs + mocks 亟亳仆 亠 仂亟亳仆 mock 亠从仍从舒 stubs Fakes Stubs Mocks 0..* 0..1
- 17. 仂仂从亳亶 仗亟仄仂从
- 18. How unit testing helps 丿于亳亟亳亶 亳从仍 亠于舒仆仆 从仂亟 仂仂亳亶 亟弍亠从 仗仂 仄仂亢仍亳于 亟亠亠从亳 亠亠从亳 亟亠亠于
- 19. 仍ﾑ亳 亠于 舒亳亶 从仂亟 弌舒弍仍仆舒 仆仂于舒 仆从仂仆舒仍仆 仍亠 于仗亠于仆亠仆仂 亰仄仆舒 亠仆亠 亠亞亠亶 仂仂 亳从仍亳 亠仍亰于
- 20. 亊从仂
- 21. 亊从仂 ﾐ術 亠于 Readable Maintainable Trustworthy
- 22. Readable 亠亞从仂 亰仂亰仄亳, 仂 于亟弍于舒 于 亠 亊从亳亶 从仂亟 亠 亊从 仗亠亠亟仄仂于亳 亊从 仗亳仗亠仆仆 仗亠亠于ﾑ 乂仂 亠 亠 仂亳亶 从仂亟 亠
- 23. Trustworthy 亠仍亠于舒仆仆 亟仂 仗仂仄亳仍仂从 弌舒弍仍仆仂 (仆亠) 仗仂仂亟 亠仄舒 从仂仆仍从ﾑ亳 亠于 弌仗舒于亟 亠ﾑ
- 25. Maintainable 丐亠亳 仍亠亞从仂 亠舒亞ﾑ 仆舒 亰仄仆亳 亠 于亳仄舒亞舒ﾑ 从仂仆亞舒 亠 亰舒仍亠亢舒 于亟 仆亳 亠于 仂亳亶 从仂亟 亠
- 26. 亰仆仂于亳亟亳
- 27. 亳亟亳 亠于 豫仆 仆亠亞舒亶仆 仆
- 28. 豫仆 亠亳 丐亠ﾑ 仂亟亳仆 仄仂亟仍 亳从仂仆ﾑ 于亳从仍ﾑ仆仂 于 仗舒仄 亠 于亳仄舒亞舒ﾑ 从仂仆亞舒 亠 于亳仄舒亞舒ﾑ DB, FS, AD, Net 舒于亢亟亳 仂于仂ﾐ火夷出 仗仂仂亟 弍仂 仗仂于仂ﾐ火夷出 仆亠 仗仂仂亟 丐仂仄 仂 仆亠 亰舒仍亠亢舒 于亟 亰仄仆仆亳 舒从仂于
- 29. 仆亠亞舒亶仆 亠亳 丐亠ﾑ 仄仂亟仍 舒亰仂仄 仂亢 仄舒亳 亰仆 仗仂于亠亟仆从 亰舒仍亠亢仆仂 于亟 弌亠亠亟仂于亳舒 (FS, DB, AD, OS, .config) 仂磲从 于亳从仂仆舒仆仆 仍从仂 于亳从仂仆舒仆仆 舒亞舒仂仗仂仂仆仂 仂于仆仂亞仂 仄
- 30. 仆亠亞舒亶仆 亠亳 -- 亰仆舒从亳 TearDown() DateTime.Now Thread Environment.MachineName Database.Save() File.Open()
- 31. Mixing 丼从亠 仂亰亟仍亠仆仆 UT 舒 IT
- 32. Trustworthy 豫仆-亠亳 仂仂亟 --> 仄舒弍 仆亠仄舒 亟亠亠从 亠 仗仂仂亟 --> 仂仆仂 亟亠亠从 仆亠亞舒亶仆 亠亳 (亟亠从仂仍亳) 仂仂亟 --> 仆亠仄舒 亟亠亠从 亠 仗仂仂亟 --> 仄仂亢仍亳于仂 亟亠亠从
- 33. 舒从亳从亳
- 34. 仂亞从舒 于 ﾐ術-亠舒 Asserts in if/switch/for/while 仆舒仆仂 仗亟于亳 亶仄仂于仆 仗仂磦亳 亟亠亠从舒 于 亠 仂亞 readability & maintainability
- 35. 弍仍ﾐ火夷出術 仍仂亞从亳 production 从仂亟 亳从仍舒亟 Tests last 丐亠 仆亠 亠 Expected hardcoded values
- 36. Magic numbers 亳从仍舒亟 舒亶仗仂 仄仂亢仍亳于 亰仆舒亠仆仆 亞仂仍仂亠仆仆 仗亠亠于从舒 于 亠
- 37. 仄仆舒 亠于 弌于仂亠仆仆: 丕 弍仍仂 于亳仗舒亟从于 亳亟舒仍亠仆仆: 仂仍亳 亠 弍仍亠 仆亠 仗仂弍仆亳亶 亠亟舒亞于舒仆仆: 仍 maintainability/readability 仍 于亳亟从仂 仂仍亳 亠 仗仂于亳仆亠仆 于亳从仂仆于舒亳 仗仂-仆仂仄
- 38. 丐亠于舒仍仆亳从 亰仆舒仂亟亳 亟亠亠从 仂于亳亶 亠 亠 仗仂于亳仆亠仆 弍亳 亰仆舒亶亟亠仆亳亶 亠于舒仍仆亳从舒仄亳 亰仆仂于
- 39. 乂仂 仄亳 仍从 亠亞亠亶 丼舒 于亳仗舒于仍亠仆仆 亟亠亠从于 亠亳从亳 磻仂 从仂亟 People feedback 仂从亳 (coverage)
- 40. 弍亳舒亶亠 于亟仂仄仍亠仆仂 丐亠于舒仆仆 仆亠 弍亠亰从仂仂于仆亠 舒亟仄仆 亠于 舒亟仄仆 亠于 于亰舒仄仂亟亶 100% 仗仂从亳 仆亠 亰舒于亢亟亳 仗仂弍仆亠
- 41. 舒 仂 亟亳于亳亳 亟舒仍 Unit testing patterns Mocks/stubs/fakes, isolation frameworks TDD, Test Driven Development Contracts, Contract Driven Development
- 42. Q&A Code-driven testing 仍亠从舒仆亟 舒于仍亳舒从, 2011 pavlyshak@gmail.com