‘TestNG’ is a framework that built with different set of APIs that facilitates many testing needs. It has variety of features that makes ‘TestNG’ more convenient than ‘JUnit’ framework. Among all the features, TestNG has ‘dependencies’ feature that gives the facility to determine the @Test annotation methods order. For the dependencies, TestNG uses ‘dependsOnMethods’ option for @Test annotation.
Hold on, should not confuse with ‘order’ word. I do not have meant that with this feature you could create your own order to run the Test methods.
TestNG dependency feature does not give guarantee on the order on which the methods depended upon will be run, however it guaranteed that TestNG will run all the @Test methods before the method which contains the ‘dependsOnMethods’ option.
In TestNG, we can achieve dependencies in two ways-
- With Annotation.
- With XML
It has two types also-
- Hard Dependency
- Soft Dependency
Hard dependency says that if depended upon @Test method fails then TestNG will skip the depended @Test method.
Soft dependency says that TestNG will run the depended @Test method if depended upon @Test methods fails also, however depended @Test method should have ‘alwaysRun=true’ option.
Hard Dependency Instance:
import org.testng.annotations.Test;
public class dependsOnMethods {
@Test
public void sub (){
int a = 7-3;
System.out.println(“sub “+a);
}
@Test (dependsOnMethods={“sub”})
public void div (){
int a = 10/2;
System.out.println(“div “+a);
}
@Test
public void add (){
int a = 7+3;
System.out.println(“add “+a);
}
}
[TestNG] Running:
C:\Users\testng-eclipse-224652221\testng-customsuite.xml
add 10
sub 4
div 5
PASSED: add
PASSED: sub
PASSED: div
TestNG runs all the @Test methods before the ‘div’ method.
Soft Dependency Instance:
import org.testng.annotations.Test;
public class dependsOnMethods {
@Test
public void sub (){
int a = 7-3;
System.out.println(“sub “+a);
}
@Test (alwaysRun= true, dependsOnMethods={“sub”})
public void div (){
int a = 10/2;
System.out.println(“div “+a);
}
@Test
public void add (){
int a = 7+3;
System.out.println(“add “+a);
}
}
TestNG will run the ‘div’ method if ‘sub’ methods fails also.
With Annotation Instance:
import org.testng.annotations.Test;
public class dependsOnMethods {
@Test
public void sub (){
int a = 7-3;
System.out.println(“sub “+a);
}
@Test (dependsOnMethods={“sub”})
public void div (){
int a = 10/2;
System.out.println(“div “+a);
}
@Test
public void add (){
int a = 7+3;
System.out.println(“add “+a);
}
}
‘div’ method is depended upon the ‘sub’ method. So whenever TestNG runs this class, all methods will run before the ‘div’ method.
[TestNG] Running:
C:\Users\testng-eclipse-224652221\testng-customsuite.xml
add 10
sub 4
div 5
PASSED: add
PASSED: sub
PASSED: div
With XML Instance:
To achieve dependency with XML, we should have testing.xml file. In testing xml file we can specify our group dependency with tag.
<test name=”regression suite”>
<groups>
<dependencies>
<group name=”sanity”/>
<group name=”functional” depends-on=”Sanity” />
<group name=”integration” depends-on=”Sanity functional” />
</dependencies>
</groups>
</test>
The <depends-on> attribute contains a space-separated list of groups.
