This document discusses JPA validation, TestNG vs JUnit, and best practices for testing. It covers how JPA can validate entity fields, the advantages of TestNG such as support for exception testing, data providers, and dependency testing. TestNG is more powerful than JUnit but the testing framework is not as important as writing extensive tests. The document recommends using JPA validation and annotating string fields with @Size when using @Column to validate column lengths. It concludes that the features of TestNG and JUnit are mostly equivalent while TestNG is slightly more powerful and elegant.

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TEST NG & JPA VALIDATION
Ing. Jiří Kiml,
26/02/2015, Bern

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Agenda
►Motivation
►JPA validation
►TestNG vers. JUnit
►Summary
►Questions

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Motivation
Kill two birds with one stone.
Light two candles with one flame.
Smell two flowers with one nose.
Tickle two bugs with one hug.
►I like TestNG
►WET (NOT DRY) validation code
►Deeper look at topic

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Agenda
►Motivation
►JPA validation
►TestNG vers. JUnit
►Best practices
►Summary
►Questions

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JPA validation
►Validating Persistent Fields
►Persistence provider will automatically perform
validation on entities immediately after the
PrePersist, PreUpdate, and PreRemove lifecycle
events.
►Built-in constraints in the
javax.validation.constraints package
►User-defined constraints
►Which column is too long?
Caused by: org.hsqldb.HsqlException: data
exception: string data, right truncation

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Agenda
►Motivation
►JPA validation
►TestNG vers. JUnit
►Best practices
►Summary
►Questions

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Test NG
►Testing framework
►Written by Cédric Beust
►New functionalities over Junit
►More powerful and easier to use
http://www.testng.org

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TestNG overview
►@Before.../@After...
►Exception Tests
►Groups
►@DataProvider
►Dependency Test

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Annotations
►Junit @BeforeClass and @AfterClass
methods have to be declared as static
►TestNG: @BeforeSuite, @AfterSuite,
@BeforeTest, @AfterTest,
@BeforeGroup and @AfterGroup

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Exception Tests
►Junit:
@Test(expected =
ConstraintViolationException.class)
►TestNG:
@Test(expectedExceptions =
ConstraintViolationException.class,
expectedExceptionsMessageRegExp = "...")

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Parametrized tests
►Junit
@RunWith(value = Parameterized.class)
►TestNG
@Test(dataProvider = "correctData")

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Groups
►Junit
@Category(FastTest.class)
Category annotations on Parameterized
classes are not supported on individual
methods.
►TestNG
@Test(groups = "fast")

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Dependency Test
►Junit
No support, independent tests only
►TestNG
@Test(dependsOnMethods = "testXXX")

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Agenda
►Motivation
►JPA validation
►TestNG vers. JUnit
►Best practices
►Summary
►Questions

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Best Practices
►?? Use JPA validation
► ?? Every String field annotated by
@Column annotation should have
length and also @Size annotation ??
►Write (junit) tests Extensively
Test framework is NOT so important.

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Agenda
►Motivation
►JPA validation
►TestNG vers. JUnit
►Best practices
►Summary
►Questions

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Summary – what we use?
►Junit and TestNG features more or less equivalent
►TestNG is slightly more powerful and elegant
►JPA validation ?

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Agenda
►Motivation
►JPA validation
►TestNG vers. JUnit
►Best practices
►Summary
►Questions

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Questions …
… and maybe answers
@RunWith(DataProviderRunner.class)

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Links
http://http://www.testng.org/
https://http://junit.org/
http://http://www.mkyong.com/unittest/junit-4-vs-testng-comparison/
http://http://docs.oracle.com/javaee/6/tutorial/doc/gircz.html
https://github.com/TNG/junit-dataprovider/wiki/Getting-
started

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Thank you
Ing. Jiří Kiml,
26/02/2015, Bern