JUnit

Annotations

@Test
 write a test

@BeforeClass   will be called very begining of all functions
@AfterClass      will be called end of all functions

These aove 2 annotations should be Static in nature

@after

@Before  :  this fucntion will be called before calling each and every test
@After  :    this fucntion will be called after calling each and every test function

Order doesn't matter...where ever you write it will be executed in order


@Ignore  :  the function will be skip the execution

Assume.assumeTrue(false)  :  no test method (@Test)  will be called


Parameterize:
step1:
@RunWith(Parameterized.class)
Step2:

Initialise variables
Step3:
create Constructor

step4: function  @test

Step5: @Parameters
public static Collection<Object[]> getData(){
Object data[][]=new Object[2][2];
//1st row
data[0][0]= "xxx";
data[0][1]= 4566;
data[1][0]= "vv";
return Arrays.asList(data);//standard returning type


Assertions and error reporting:

Error Collector- declare this object as global
@Rule
public ErrorCollector errCol= new ErrorCollector();

try{
Assert.assertEquals("Hello", "Hello122");
Assert.assertTrue("error", 3>7);
}catch(Throwable t){
//System.out.println("error "+t);

//report error
errCol.addError(t);


Batch  test:  to run more than 1 at a time
use annotation,
@RunWith(Suite.class)
@SuiteClasses({
and then give all classes like xxx.class,xxx2.class,xxx3.class and run...