Use JUnit

• How to use the Junit in JDeveloper
• How to use Junit and the effact
• How to use junit in intelliJ
• How to use Junit Listener
• How to Use JUnit With JMeter

The simplest way is as an expression in a debugger. You can change debug expressions without recompiling, and you can wait to decide what to write until you have seen the running objects. You can also write test expressions as statements which print to the standard output stream. Both styles of tests are limited because they require human judgment to analyze their results. Also, they don't compose nicely- you can only execute one debug expression at a time and a program with too many print statements causes the dreaded "Scroll Blindness".

JUnit tests do not require human judgment to interpret, and it is easy to run many of them at the same time. When you need to test something, here is what you do:

1. Annotate a method with @org.junit.Test
2. When you want to check a value, import org.junit.Assert.* statically, call assertTrue() and pass a boolean that is true if the test succeeds

@Test public void simpleAdd() {     

Money m12CHF= new Money(12, "CHF");      

Money m14CHF= new Money(14, "CHF");      

Money expected= new Money(26, "CHF");      

Money result= m12CHF.add(m14CHF);      

assertTrue(expected.equals(result)); 

}