There may be many reasons for a Test case getting failed, may be due to element not found or time out exception or stale element exception etc. Normally in automation after executing scripts/tests, we will check for the results and if the test fails because of above reasons we will re-run then again.
Instead of that we can ask testNG to execute the failed test cases again for number of times and check for the updated results.
To achieve this we need to implement TestNG IRetryAnalyzer. Below is the simple code:
package com.pack.test;
import org.testng.IRetryAnalyzer;
import org.testng.ITestResult;
public class Retry implements IRetryAnalyzer {
private int retryCount = 0;
private int maxRetryCount = 1;
// Below method returns 'true' if the test method has to be retried else 'false'
//and it takes the 'Result' as parameter of the test method that just ran
public boolean retry(ITestResult result) {
if (retryCount < maxRetryCount) {
System.out.println("Retrying test " + result.getName() + " with status "
+ getResultStatusName(result.getStatus()) + " for the " + (retryCount+1) + " time(s).");
retryCount++;
return true;
}
return false;
}
public String getResultStatusName(int status) {
String resultName = null;
if(status==1)
resultName = "SUCCESS";
if(status==2)
resultName = "FAILURE";
if(status==3)
resultName = "SKIP";
return resultName;
}
}
Create an other class 'RetryListener' by implementing 'IAnnotationTransformer'. We need to setRetryAnalyzer for iTestAnnotation. In the example below, add the above class name.
package com.pack.test;
import java.lang.reflect.Constructor;
import java.lang.reflect.Method;
import org.testng.IAnnotationTransformer;
import org.testng.IRetryAnalyzer;
import org.testng.annotations.ITestAnnotation;
public class RetryListener implements IAnnotationTransformer {
@Override
public void transform(ITestAnnotation testannotation, Class testClass,
Constructor testConstructor, Method testMethod) {
IRetryAnalyzer retry = testannotation.getRetryAnalyzer();
if (retry == null) {
testannotation.setRetryAnalyzer(Retry.class);
}
}
}
After this, We need to add the Listener to testng.xml file. Below is syntax to add listener for RetryListener.
<listeners>
<listener class-name="com.pack.test.RetryListener"/>
</listeners>