README.md

testing-junit4-lab1

Junit4 basics training exercises.

manual

1. Open class Person
2. Ctrl + Shift + T
3. Create New Test -> OK -> OK
4. In PersonTest class:
   • create methods setAgeTest
   • put @Test annotation over it
   • create object Person
   • person.setAge(10)
   • verify if person.getAge() is 10

     @Test
     public void setAgeTest() {
     // given
         Person person = new Person();
         
     // when    
         person.setAge(10);
         
     // then
         assertThat(person.getAge(), is(10));
     }    
     

     imports:

     import static org.hamcrest.CoreMatchers.is;
     import static org.junit.Assert.*;
     

   • Verifying exceptions:

     @Test(expected = IllegalArgumentException.class)
     public void setAgeTest() {
     // given
         Person person = new Person();
         
     // when
         person.setAge(-4);
     }    
     

tasks

1. Test class entities.Person
   • constructor - OK
   • constructor - exceptions (parameter validation)
   • setters + getters - OK
   • setters - exceptions (parameter validation)
   • addAllHobbiesTo - no common hobbies
   • addAllHobbiesTo - some common hobbies
   • addHobby - add already existing
   • addHobby - add new
2. Test class entities.PersonImmutable
   • constructor - OK
   • constructor - exceptions (parameter validation)
   • check if hobbies set is immutable (try to add something)
   • check equals contract
   • check hashcode contract
3. Test class service.PersonImmutableService
   • checkIfAnyHasGivenName - OK
   • checkIfAnyHasGivenName - exception (parameter validation)
   • findAllOlderThanGivenAge - OK

To read

• Java
  • Packages: https://docs.oracle.com/javase/tutorial/java/package/packages.html
  • Access modifiers: http://tutorials.jenkov.com/java/access-modifiers.html
  • Final keyword: https://en.wikipedia.org/wiki/Final_(Java)
  • Primitive Data Types: https://docs.oracle.com/javase/tutorial/java/nutsandbolts/datatypes.html
  • Wrapper classes: https://www.baeldung.com/java-wrapper-classes
  • References: http://www.informit.com/articles/article.aspx?p=174371&seqNum=4
  • Immutable: https://docs.oracle.com/javase/tutorial/essential/concurrency/immutable.html
  • JavaBeans: https://en.wikipedia.org/wiki/JavaBeans
  • Set: https://www.geeksforgeeks.org/set-in-java/
  • List: https://docs.oracle.com/javase/8/docs/api/java/util/List.html
  • Equals contract: https://docs.oracle.com/javase/7/docs/api/java/lang/Object.html#equals(java.lang.Object)
  • Hashcode contract: https://docs.oracle.com/javase/7/docs/api/java/lang/Object.html#hashCode()
  • Exceptions, Errors: https://www.geeksforgeeks.org/exceptions-in-java/