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JUnit5 Custom TestEngines intro - version 2020-06

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Sven Ruppert
Sven Ruppert

JUnit5 has been out for some time now, but what are the hidden pearls you can find inside the new Junit Platform? This session explores the possibilities, from @Test over custom extensions up to your own TestEngine. The presentation shows you how to manage a full-stack test in different flavours, based on the JUnit5 possibilities. The main focus is on the development of a custom TestEngine to support project-specific needs. After this, you’ll have all the bits and bytes you need for starting your journey with JUnit5.

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JUnit5 – Custom TestEngines How to create your own TDD universe
Who is speaking? • Sven Ruppert • Developer Advocate – DevSecOps • JFrog Inc • Twitter: @SvenRuppert • eMail: svenr@jfrog.com
THE AGENDA The Junit5 Intro JUnit5 – test your TestEngine How to start your TestEngine The basic structure of a TestEngine How to define a Test How to execute a TestPlan Custom TestEngines – Ideas
The Junit5 Intro Subject to test Preparations Clean Up Subject to test Preparations Clean Up Global Preparations Global Clean Up
The Junit5 Intro Subject to test Preparations Clean Up Subject to test Preparations Clean Up Global Preparations Global Clean Up context context Context Preparations / Clean up must be fast Easy if this is symmetric How to deal with exceptions? Different Tests -> different preparations / context
The Junit5 Intro Subject to test Preparations Clean Up Subject to test Preparations Clean Up Global Preparations Global Clean Up context context Context TestGroupI TestGroupII TestGroupIII
The Junit5 Intro Subjecttotest Preparations CleanUp Subjecttotest Preparations CleanUp GlobalPreparations GlobalCleanUp context context Context Test Group I Subjecttotest Preparations CleanUp Subjecttotest Preparations CleanUp GlobalPreparations GlobalCleanUp context context Context Test Group II TestengineI
The Junit5 Intro
The Junit5 Intro @Test @ExtendWith ExtensionContext LifeCycle - Management Subject to test Preparations Clean Up Global Preparations Global Clean Up context Context TestGroupI }
The Junit5 Intro
The Junit5 Intro
The Junit5 Intro
The Junit5 Intro
The Junit5 Intro BeforeEach - ABeforeEach - B BeforeAll - B BeforeAll - A AfterEach - BAfterEach - A AfterAll - A AfterAll - B
The Junit5 Intro
The Junit5 Intro
@Test void test001(Demo demo){ Assertions.assertEquals("Hello World", demo.value()); } The Junit5 Intro
public static class DemoParameterResolver implements ParameterResolver { @Override public boolean supportsParameter(ParameterContext parameterContext, ExtensionContext extensionContext) throws ParameterResolutionException { final Class<?> type = parameterContext.getParameter().getType(); return Demo.class.isAssignableFrom(type); } @Override public Object resolveParameter(ParameterContext parameterContext, ExtensionContext extensionContext) throws ParameterResolutionException { return new Demo(1, "Hello World"); } } The Junit5 Intro
@Test @ExtendWith(DemoParameterResolver.class) void test001(Demo demo){ Assertions.assertEquals("Hello World", demo.value()); } The Junit5 Intro
JUnit5 – test your TestEngine How to test a TestEngine? We need a way to test a new TestEngine As first exercise we will test an existing TestEngine
JUnit5 – test your TestEngine <dependency> <groupId>org.junit.platform</groupId> <artifactId>junit-platform-testkit</artifactId> <version>${junit5.version}</version> <scope>test</scope> </dependency>
JUnit5 – test your TestEngine Two tests are started / one test is disabled One test is failing
JUnit5 – test your TestEngine Two tests started One Test positive One Test skipped One Test failed
JUnit5 – test your TestEngine
How to start your TestEngine Discovery the Tests prepare the Launcher create the TestPlan register Listeners execute Launcher consume the Result
How to start your TestEngine
The basic structure of a Testengine Basic Structure to build a Custom TestEngine No real Test-Discovery in the first run Production code - the Test-Engine Test code - the Test-Engine-Tests Test the custom Test-Engine with the Jupiter-Engine
The basic structure of a TestEngine <dependency> <groupId>org.junit.platform</groupId> <artifactId>junit-platform-engine</artifactId> <version>${junit.platform.version}</version> <scope>compile</scope> </dependency> <dependency> <groupId>org.junit.platform</groupId> <artifactId>junit-platform-commons</artifactId> <version>${junit.platform.version}</version> <scope>compile</scope> </dependency>
The basic structure of a TestEngine <!-- needed for writing integration tests--> <dependency> <groupId>org.junit.platform</groupId> <artifactId>junit-platform-launcher</artifactId> <version>${junit.platform.version}</version> <scope>compile</scope> </dependency>
The basic structure of a TestEngine
[ 1 containers found ] [ 0 containers skipped ] [ 1 containers started ] [ 0 containers aborted ] [ 1 containers successful ] [ 0 containers failed ] [ 0 tests found ] [ 0 tests skipped ] [ 0 tests started ] [ 0 tests aborted ] [ 0 tests successful ] [ 0 tests failed ] The basic structure of a TestEngine
How to define a Test Find all tests with the Annotation @NanoTest Execute all discovered tests IDE should be able to execute the test Maven should be able to execute the test
How to define a Test
How to define a Test
How to define a Test
How to define a Test
How to define a Test
How to define a Test
How to define a TestPlan
How to define a TestPlan
How to define a TestPlan
How to define a TestPlan A TestDescriptor is a Node inside the TestPlan A Node can be a Container or a Test A Test is a leaf from this tree A Descriptor can be a Container and a Test at the same time A good start is the AbstractTestDescriptor
How to define a TestPlan
How to define a TestPlan
How to execute a TestPlan
How to execute a TestPlan
How to execute a TestPlan
How to execute a TestPlan
How to execute a TestPlan
How to execute a TestPlan @NanoTestClass public class FirstNanoTest { @NanoTest void test001_A() { } }
Custom TestEngines - Ideas Add a Lic Check for your commercial product Store runtime metrics Authentication / Authorisation Domain – Specific – Testdefinition Complex Infrastructure Lifecycle Management Dynamic Testinput from external sources Testtechniques – like MutationTesting Persistent Immutable Testplans Testexecution Priorities
Distributed TestPlan-Execution IDE or maven Testplan TestClass TestMethod Execution-Nodes JFrog - Artifactory
SecurityPayload Generator Injection Store a TestPlan with the BuildInfo Load binary data from Artifactory – Generic Repo SecurityPayload Generator Injection Store a TestResults with the BuildInfo Repo Testplan Repo SecurityPayload TestResultRepo
Artifactory / XRay and how to use it Internet REST API / WebUI RulePolicyWatch Repo
Try it : OnPrem and/or Cloud https://jfrog.com/platform/free-trial/ Just try it
THANK YOU! • Sven Ruppert • Developer Advocate – DevSecOps • Jfrog Inc • Twitter: @SvenRuppert • eMail: svenr@jfrog.com

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JUnit5 Custom TestEngines intro - version 2020-06

  • 1. JUnit5 – Custom TestEngines How to create your own TDD universe
  • 2. Who is speaking? • Sven Ruppert • Developer Advocate – DevSecOps • JFrog Inc • Twitter: @SvenRuppert • eMail: svenr@jfrog.com
  • 3. THE AGENDA The Junit5 Intro JUnit5 – test your TestEngine How to start your TestEngine The basic structure of a TestEngine How to define a Test How to execute a TestPlan Custom TestEngines – Ideas
  • 4. The Junit5 Intro Subject to test Preparations Clean Up Subject to test Preparations Clean Up Global Preparations Global Clean Up
  • 5. The Junit5 Intro Subject to test Preparations Clean Up Subject to test Preparations Clean Up Global Preparations Global Clean Up context context Context Preparations / Clean up must be fast Easy if this is symmetric How to deal with exceptions? Different Tests -> different preparations / context
  • 6. The Junit5 Intro Subject to test Preparations Clean Up Subject to test Preparations Clean Up Global Preparations Global Clean Up context context Context TestGroupI TestGroupII TestGroupIII
  • 7. The Junit5 Intro Subjecttotest Preparations CleanUp Subjecttotest Preparations CleanUp GlobalPreparations GlobalCleanUp context context Context Test Group I Subjecttotest Preparations CleanUp Subjecttotest Preparations CleanUp GlobalPreparations GlobalCleanUp context context Context Test Group II TestengineI
  • 9. The Junit5 Intro @Test @ExtendWith ExtensionContext LifeCycle - Management Subject to test Preparations Clean Up Global Preparations Global Clean Up context Context TestGroupI }
  • 14. The Junit5 Intro BeforeEach - ABeforeEach - B BeforeAll - B BeforeAll - A AfterEach - BAfterEach - A AfterAll - A AfterAll - B
  • 17. @Test void test001(Demo demo){ Assertions.assertEquals("Hello World", demo.value()); } The Junit5 Intro
  • 18. public static class DemoParameterResolver implements ParameterResolver { @Override public boolean supportsParameter(ParameterContext parameterContext, ExtensionContext extensionContext) throws ParameterResolutionException { final Class<?> type = parameterContext.getParameter().getType(); return Demo.class.isAssignableFrom(type); } @Override public Object resolveParameter(ParameterContext parameterContext, ExtensionContext extensionContext) throws ParameterResolutionException { return new Demo(1, "Hello World"); } } The Junit5 Intro
  • 20. JUnit5 – test your TestEngine How to test a TestEngine? We need a way to test a new TestEngine As first exercise we will test an existing TestEngine
  • 21. JUnit5 – test your TestEngine <dependency> <groupId>org.junit.platform</groupId> <artifactId>junit-platform-testkit</artifactId> <version>${junit5.version}</version> <scope>test</scope> </dependency>
  • 22. JUnit5 – test your TestEngine Two tests are started / one test is disabled One test is failing
  • 23. JUnit5 – test your TestEngine Two tests started One Test positive One Test skipped One Test failed
  • 24. JUnit5 – test your TestEngine
  • 25. How to start your TestEngine Discovery the Tests prepare the Launcher create the TestPlan register Listeners execute Launcher consume the Result
  • 26. How to start your TestEngine
  • 27. The basic structure of a Testengine Basic Structure to build a Custom TestEngine No real Test-Discovery in the first run Production code - the Test-Engine Test code - the Test-Engine-Tests Test the custom Test-Engine with the Jupiter-Engine
  • 28. The basic structure of a TestEngine <dependency> <groupId>org.junit.platform</groupId> <artifactId>junit-platform-engine</artifactId> <version>${junit.platform.version}</version> <scope>compile</scope> </dependency> <dependency> <groupId>org.junit.platform</groupId> <artifactId>junit-platform-commons</artifactId> <version>${junit.platform.version}</version> <scope>compile</scope> </dependency>
  • 29. The basic structure of a TestEngine <!-- needed for writing integration tests--> <dependency> <groupId>org.junit.platform</groupId> <artifactId>junit-platform-launcher</artifactId> <version>${junit.platform.version}</version> <scope>compile</scope> </dependency>
  • 30. The basic structure of a TestEngine
  • 31. [ 1 containers found ] [ 0 containers skipped ] [ 1 containers started ] [ 0 containers aborted ] [ 1 containers successful ] [ 0 containers failed ] [ 0 tests found ] [ 0 tests skipped ] [ 0 tests started ] [ 0 tests aborted ] [ 0 tests successful ] [ 0 tests failed ] The basic structure of a TestEngine
  • 32. How to define a Test Find all tests with the Annotation @NanoTest Execute all discovered tests IDE should be able to execute the test Maven should be able to execute the test
  • 33. How to define a Test
  • 34. How to define a Test
  • 35. How to define a Test
  • 36. How to define a Test
  • 37. How to define a Test
  • 38. How to define a Test
  • 39. How to define a TestPlan
  • 40. How to define a TestPlan
  • 41. How to define a TestPlan
  • 42. How to define a TestPlan A TestDescriptor is a Node inside the TestPlan A Node can be a Container or a Test A Test is a leaf from this tree A Descriptor can be a Container and a Test at the same time A good start is the AbstractTestDescriptor
  • 43. How to define a TestPlan
  • 44. How to define a TestPlan
  • 45. How to execute a TestPlan
  • 46. How to execute a TestPlan
  • 47. How to execute a TestPlan
  • 48. How to execute a TestPlan
  • 49. How to execute a TestPlan
  • 50. How to execute a TestPlan @NanoTestClass public class FirstNanoTest { @NanoTest void test001_A() { } }
  • 51. Custom TestEngines - Ideas Add a Lic Check for your commercial product Store runtime metrics Authentication / Authorisation Domain – Specific – Testdefinition Complex Infrastructure Lifecycle Management Dynamic Testinput from external sources Testtechniques – like MutationTesting Persistent Immutable Testplans Testexecution Priorities
  • 52. Distributed TestPlan-Execution IDE or maven Testplan TestClass TestMethod Execution-Nodes JFrog - Artifactory
  • 53. SecurityPayload Generator Injection Store a TestPlan with the BuildInfo Load binary data from Artifactory – Generic Repo SecurityPayload Generator Injection Store a TestResults with the BuildInfo Repo Testplan Repo SecurityPayload TestResultRepo
  • 54. Artifactory / XRay and how to use it Internet REST API / WebUI RulePolicyWatch Repo
  • 55. Try it : OnPrem and/or Cloud https://jfrog.com/platform/free-trial/ Just try it
  • 56. THANK YOU! • Sven Ruppert • Developer Advocate – DevSecOps • Jfrog Inc • Twitter: @SvenRuppert • eMail: svenr@jfrog.com