TestNG is a testing framework for the Java programming language. TestNG enables programmers to write test cases in a more structured way and also allows for the execution of test cases in parallel. In this blog post, we will take a look at how to run failed test cases using TestNG.
If you are a software tester, then at some point you have probably run into a failed test case. Maybe the application under test crashed, or maybe the expected results were not met. Whatever the reason, a failed test case can be frustrating.
Fortunately, there is a tool that can help you re-run failed test cases: TestNG. TestNG is a testing framework for Java that lets you easily re-run failed tests. In this blog post, we will show you how to use TestNG to re-run failed test cases.
First, we need to add the TestNG library to our project. If you are using Maven, then you can add the following dependency to your pom.xml file:
Rerun Failed Test Cases in Testng
When a test case fails, it is important to rerun that test in order to determine if the failure was due to an error in the code or due to an incorrect input. In TestNG, there is a feature that allows you to automatically rerun failed test cases.
To use this feature, you first need to set the ‘rerunFailingTestsCount’ parameter in your testng.xml file.
This parameter tells TestNG how many times it should retry a failed test case. For example, if you set the value to 2, then TestNG will run a failed test case twice before giving up and marking it as a failure.
You can also specify what actions should be taken when a test case fails by using the ‘onRerun’ attribute.
This attribute can be set to either ‘continue’ or ‘skip’. If you set it to ‘continue’, TestNG will continue running the rest of the tests even if one or more tests fail. If you set it to ‘skip’, however, TestNG will skip any tests that depend on the failing test (this includes both direct and indirect dependencies).
Using these two parameters, you can fine-tune how TestNG behaves when faced with failing tests cases. This can be useful in ensuring that your tests are robust and that any failures are properly investigated.
Testng Rerun Failed Tests Maven
TestNG is a testing framework for the Java programming language. It is an open source project hosted on GitHub. TestNG is released under the Apache 2.0 license.
TestNG allows you to rerun failed tests without needing to recompile your code or even restart your application server. This can be extremely useful when you’re trying to debug a failing test or track down a flaky test case. To use this feature, simply add the @Test(retryAnalyzer=RetryAnalyzer.class) annotation to your test class.
When TestNG encounters a failure, it will automatically invoke the RetryAnalyzer and give it a chance to decide whether or not to retry the test case. There are two different ways that you can configure how many times a failed test case should be retried: You can specify the maximum number of times that a test case should be retried by setting the maxRetries attribute on the @Test annotation: @Test(retryAnalyzer=RetryAnalyzer.class, maxRetries=3) public void myTest() { … } If you don’t specify a value for maxRetries , then TestNG will default to
- This means that by default, failed tests will only be run once more before giving up and marking the test as a failure. You can also set the Retry Analyzer’s -wide by setting the suite-wide configuration parameter retryanalyzer . This parameter takes fully qualified name of IAnnotationTransformer which in turn returns IAnnotationTransformer
- Note: Do not forget about calling super implementation if overriding method from parent classes like AnnotationTransformer , IAnnotationTransformer2 etc., else rerun functionality might not work as expected!
Testng-Failed.Xml Not Created
If you are using TestNG and your test run fails, you might be wondering why the Failed.xml file is not created. This file is supposed to contain information about what tests failed, but if it’s not being created, it can be very difficult to figure out what went wrong. There are a few possible reasons for this:
- You might not be using the correct listener. The Failed.xml file is created by the TestNGXmlReporterListener, so make sure you have that listener added to your project.
- Another possibility is that your tests are actually passing, but they are just taking a long time to run. In this case, the Failed.xml file will eventually be created once the tests finish running successfully.
- Finally, it’s also possible that there was an error during the creation of the Failed.xml file itself. If this happens, you should see an error message in the log files indicating what went wrong.
If you’re still having trouble figuring out why the Failed..xml file isn’t being created, feel free to post a question on the TestNG forum (http://testng-users. though I doubt anyone else has seen anything like this.
Test Case Fail Example
We’ve all been there before. You’re working on a project, everything is going great, and then you hit a snag. A test case fails and you can’t figure out why.
It’s frustrating, but it happens to everyone. Here’s an example of a test case fail to help you understand what goes wrong and how to fix it.
The scenario: You’re working on a web application that allows users to login and view their account information.
The feature is simple enough – a user enters their username and password, clicks the login button, and they’re taken to their account page. Easy peasy, right?
Wrong.
For some reason, your test cases are failing when you try to log in with valid credentials. Every time you enter the correct username and password, the login button doesn’t do anything. No matter how many times you click it, nothing happens.
Frustrated, you take a look at the code… only to realize that you forgot to add the ‘click’ event handler for the login button! Doh!
Fixing this issue is easy – simply add the missing event handler and re-run your tests.
With any luck, they should all pass now and you can move on with your day (and your project).
This example shows how even small oversights can cause big problems down the road. That’s why it’s so important to be thorough when writing code and testing applications – one missed detail can throw everything off course!
How to Write Test Cases Pass Or Fail Using Selenium
When it comes to writing test cases for Selenium, there are a few things you need to keep in mind. First and foremost, you need to make sure that your test cases are well-written and easy to understand. Secondly, you need to ensure that they are comprehensive enough to cover all potential scenarios.
Finally, you need to be able to run them quickly and efficiently.
Assuming that you have already written your test cases, let’s take a look at how you can determine whether they pass or fail using Selenium. In general, there are two ways to do this – through the use of assertions or through the use of verifications.
Let’s take a look at each method in turn:
Assertions: Assertions allow you to check whether a particular condition is true or false. If the condition is true, then the assertion passes; if it is false, then the assertion fails.
In Selenium, there are two types of assertions – positive and negative. Positive assertions check that something is true, while negative assertions check that something is false.
To write an assertion in Selenium, simply use the ‘assert’ keyword followed by the condition you want to check.
For example: assert(condition). If the condition evaluates to true, then the assertion will pass; if it evaluates to false, then the assertion will fail. You can also use ‘verify’ instead of ‘assert’ if you want Selenium to continue running even if an assertion fails (this is useful for debugging purposes).
For example:
assertTrue(condition);
verifyTrue(condition);
conditions can be any kind of Boolean expression – for instance, checking that an element is present on a page or not; checking that a text box contains certain text; checking that a button has been clicked; etc. There really are no limits as to what kind of conditions you can check for! However, it’s important not to get too carried away with assertions – remember that they should only be used when absolutely necessary (otherwise your tests will become very long and difficult to read).
Verifications: Verifications allow you To Check That A Particular Condition Is True Or False .unlike Assertions , Even If The Verify Method Fails , The Test Will Continue Executing . This Makes Them Ideal For Checks That Need To Be Performed On Every Page Of A Website (e .g .
How to Rerun Failed Test Cases in Robot Framework
When a test case fails in Robot Framework, it is important to rerun the failed test case to ensure that the failure was not caused by an error in the test script. There are two ways to rerun a failed test case:
- 1) Use the command line option –runfailed when running Robot Framework. This will create a new output file that includes only the failed test cases.
- 2) Use the Run Failed Tests button in the Robot Framework IDE. This will open a dialog that allows you to select which output files to include and what kind of report you want.
Testng Annotations
TestNG is a testing framework for the Java programming language. It is an open source project hosted on GitHub. TestNG is developed by Cédric Beust and was inspired by JUnit and NUnit.
The design goal of TestNG is to cover a wider range of test categories: unit, functional, end-to-end, integration, etc., with more ease and flexibility than what is possible with other frameworks.
@BeforeMethod
This annotation marks a method as a part of the test setup.
The @BeforeMethod annotated method will be executed before each test method in the current class is invoked.
@AfterMethod
This annotation marks a method as part of the test cleanup.
The @AfterMethod annotated method will be executed after each test method in the current class has been invoked.
@BeforeClass
This annotation marks a method as part of the test setup.
The @BeforeClass annotatedmethod will be executed once before any of the test methods in the current class are invoked.
Priority in Testng
xml Priority is an attribute of the tag in TestNG.xml file, which is used to set the order of test execution. The lower the value of priority, the sooner a test will be executed.
All tests with the same priority are scheduled in alphabetical order. If two tests have different priorities, then TestNG will execute all @BeforeMethods and @AfterMethods before and after each individual test, respectively (i.e., one @BeforeMethod for each @Test).
Which Interface is Used to Retry the Failed Test Cases in Testng?
Assuming you are referring to TestNG’s built in retry functionality, this is implemented using IRetryAnalyzer.
IRetryAnalyzer is an interface that allows you to tell TestNG how many times a test should be rerun if it fails, and on what conditions. By default, TestNG will not retry failed tests, but by implementing IRetryAnalyzer and specifying the desired behavior, tests can be automatically retried when they fail.
There are two methods defined in IRetryAnalyzer:
public boolean retry(ITestResult result);
public void onTestFailure(ITestResult tr);
The first method, retry(), is called before each attempt to run a test. It returns true if the test should be retried, and false otherwise. The second method, onTestFailure(), is called after each failed attempt.
It can be used to perform any necessary cleanup after a test failure.
To use IRetryAnalyzer, simply create a class that implements the interface and specify it as a parameter in your @Test annotation:
@Test(retryAnalyzer = MyRetryAnalyzer.class)
How Do I Run Failed Test Cases in Maven?
Assuming that you are using JUnit to write your tests, you can re-run failed test cases in Maven by doing the following:
- Go to the directory where your pom.xml file is located.
- Run the command “mvn test”. This will run all of your tests.
- If any tests fail, then the command will print out a list of failed tests.
- To re-run a specific failed test, use the command “mvn -Dtest= test”. This will just run the specified test case.
How Do You Capture Failed Test Cases?
There are a few ways to capture failed test cases. One way is to use a tool like JUnit or TestNG. These tools can be configured to generate reports that include information on failed test cases.
Another way to capture failed test cases is to take screenshots or videos of the failing tests. This can be helpful in situations where the failure is not easily reproducible. Finally, it is also possible to manually log failed test cases using a spreadsheet or other documentation system.
How Do You Fix Test Configuration Failure in Testng?
If you’re seeing a “test configuration failure” error in TestNG, it means that there’s something wrong with your test code or how it’s configured. There are a few different ways to fix this issue:
- Check your test code for any errors. If you’re using Eclipse, you can do this by going to the “Problems” view and looking for any red markers.
- Make sure that your test methods are annotated with @Test and that they’re located in a class annotated with @Test(groups={“yourgroup”}) .
- Make sure that all of the required jars are on your classpath. TestNG requires several jars, which can be found in the lib directory of the TestNG distribution.
How to Run only failed Testcases in Selenium Automation | TestNG framework with TestNG-Failed.xml
Conclusion
If you are using TestNG and your test cases fail, you can re-run them using the TestNG tool. To do this, you need to first set up a testng.xml file. This file will contain information about your failed test cases.
Once you have created this file, you can run your failed test cases by simply running the TestNG tool.