This tutorial helps in better understanding of the framework needed to test the enterprise to deliver best and reliable application result. TestNG is developed to. TestNG is a testing framework developed in the lines of JUnit and NUnit, This tutorial provides a good understanding on TestNG framework needed to test an. TestNG Tutorial in PDF - Learn TestNG in simple and easy steps starting from basic to advanced concepts with examples including Overview, Environment.
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TestNG Tutorial: Learn how TESTNG overcomes the limitation of another popular testing framework Junit. TestNG generates report based on. Keywords: Seleniun WebDriver, Test automation, TestNG. Introduction. Selenium is an open architecture/.  aracer.mobim/aracer.mobi Write the business logic of your test and insert TestNG annotations in your code. For example, if you want to generate a PDF report of your test run, you don't.
A simple way to solve this problem is to create a group called "broken" and make these test methods belong to it. You can define groups at the class level and then add groups at the method level: All.
Test methods don't have to be parameterless.
You can use an arbitrary number of parameters on each of your test method, and you instruct TestNG to pass you the correct parameters with the Parameters annotation.
If you are using simple values for your parameters, you can specify them in your testng. This XML parameter is defined in testng. On at most one constructor of your test class. In this case, TestNG will invoke this particular constructor with the parameters initialized to the values specified in testng.
This feature can be used to initialize fields inside your classes to values that will then be used by your test methods. Notes: The XML parameters are mapped to the Java parameters in the same order as they are found in the annotation, and TestNG will issue an error if the numbers don't match.
Parameters are scoped. In testng. This is convenient if you need to specify a parameter applicable to all your tests and override its value only for certain tests. Parameters with DataProviders Specifying parameters in testng. In this case, you can use a Data Provider to supply the values you need to test. A Data Provider is a method on your class that returns an array of array of objects.
By default, the data provider will be looked for in the current test class or one of its base classes.
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Our Portals: In this example, method1 is declared as depending on any group matching the regular expression "init.
Skipped methods will be reported as such in the final report in a color that is neither red nor green in HTML , which is important since skipped methods are not necessarily failures.
Both dependsOnGroups and dependsOnMethods accept regular expressions as parameters. For dependsOnMethods , if you are depending on a method which happens to have several overloaded versions, all the overloaded methods will be invoked.
If you only want to invoke one of the overloaded methods, you should use dependsOnGroups. For a more advanced example of dependent methods, please refer to this article , which uses inheritance to provide an elegant solution to the problem of multiple dependencies.
This behavior might not be desirable in certain scenarios, such as for example testing a sign in and sign out of a web browser for various countries. In such a case, you would like the following ordering: Factories Factories allow you to create tests dynamically. For example, imagine you want to create a test method that will access a page on a Web site several times, and you want to invoke it with different values: Or, if building a test suite instance programatically, you can add the factory in the same manner as for tests:.
The objects returned can be of any class not necessarily the same class as the factory class and they don't even need to contain TestNG annotations in which case they will be ignored by TestNG. Factories can also be used with data providers, and you can leverage this functionality by putting the Factory annotation either on a regular method or on a constructor.
Here is an example of a constructor factory: Class level annotations The Test annotation can be put on a class instead of a test method: You can still repeat the Test annotation on a method if you want to add certain attributes.
For example: Ignoring tests TestNG lets you ignore all the Test methods: In a class or In a particular package or In a package and all of its child packages using the new annotation Ignore. Here's a sample that shows how to ignore all tests within a class. Ignore; import org.
When Ignore is placed on a class, all the tests in that class will be disabled. Additionally, the attribute thread-count allows you to specify how many threads should be allocated for this execution.
Note that testng-failed. Similarly, you can invoke TestNG on a testng.
In order to do this, you can use the classes found the package org. XmlClass , XmlTest , etc Each of these classes correspond to their XML tag counterpart. For example, suppose you want to create the following virtual file: Child" ; test. In order to achieve this, you need to use an Annotation Transformer. An Annotation Transformer is a class that implements the following interface: TestNG -listener MyTransformer testng. When the method transform is invoked, you can call any of the setters on the ITest test parameter to alter its value before TestNG proceeds further.
For example, here is how you would override the attribute invocationCount but only on the test method invoke of one of your test classes: Method Interceptors Once TestNG has calculated in what order the test methods will be invoked, these methods are split in two groups: Methods run sequentially. These are all the test methods that have dependencies or dependents. These methods will be run in a specific order. Methods run in no particular order. These are all the methods that don't belong in the first category.
The order in which these test methods are run is random and can vary from one run to the next although by default, TestNG will try to group test methods by class. In order to give you more control on the methods that belong to the second category, TestNG defines the following interface: Your intercept method is expected to return a similar list of IMethodInstance , which can be either of the following: The same list you received in parameter but in a different order.
A smaller list of IMethodInstance objects. A bigger list of IMethodInstance objects. Once you have defined your interceptor, you pass it to TestNG as a listener.
Shell java -classpath "testng-jdk TestNG -listener test. NullMethodInterceptor -testclass test. FooTest For the equivalent ant syntax, see the listeners attribute in the ant documentation. For example, here is a Method Interceptor that will reorder the methods so that test methods that belong to the group "fast" are always run first: These interfaces are broadly called "TestNG Listeners". Here are a few listeners: Using -listener on the command line. Using the Listeners annotation on any of your test classes.
Using ServiceLoader. Specifying listeners with testng. Or if you prefer to define these listeners in Java: The reason is that these listeners need to be known very early in the process so that TestNG can use them to rewrite your annotations, therefore you need to specify these listeners in your testng. Note that the Listeners annotation will apply to your entire suite file, just as if you had specified it in a testng.
If you want to restrict its scope for example, only running on the current class , the code in your listener could first check the test method that's about to run and decide what to do then.
Here's how it can be done.
First define a new custom annotation that can be used to specify this restriction: Retention RetentionPolicy. With ServiceLoader, all you need to do is create a jar file that contains your listener s and a few configuration files, put that jar file on the classpath when you run TestNG and TestNG will automatically find them. Here is a concrete example of how it works. Let's start by creating a listener any TestNG listener should work: ITestNGListener , which will name the implementation s you want for this interface.
You should end up with the following directory structure, with only two files: ITestNGListener test. TmpSuiteListener Create a jar of this directory: TestNG testng-single. Dependency injection TestNG supports two different kinds of dependency injection: Native dependency injection TestNG lets you declare additional parameters in your methods. When this happens, TestNG will automatically fill these parameters with the right value.
Dependency injection can be used in the following places: Any AfterMethod method can declare a parameter of type ITestResult , which will reflect the result of the test method that was just run. Any BeforeMethod and AfterMethod can declare a parameter of type java. This parameter will receive the test method that will be called once this BeforeMethod finishes or after the method as run for AfterMethod.
Any BeforeMethod can declare a parameter of type Object. This parameter will receive the list of parameters that are about to be fed to the upcoming test method, which could be either injected by TestNG, such as java. Method or come from a DataProvider. The latter parameter will receive the test method that is about to be invoked. You can turn off injection with the NoInjection annotation: Your createModule method should return a Guice Module that will know how to instantiate this test class.
You can use the test context to find out more information about your environment, such as parameters specified in testng. You will get even more flexibility and Guice power with parent-module and guice-stage suite parameters. Here is how you can define parent-module in your test. TestNG will create this module only once for given suite. Will also use this module for obtaining instances of test specific Guice modules and module factories, then will create child injector for each test class.
With such approach you can declare all common bindings in parent-module also you can inject binding declared in parent-module in module and module factory.
Here is an example of this functionality: Then MyContext is injected using constructor injection into TestModule class, which also declare binding for MySession. Later in TestClass you see two injections: Listening to method invocations The listener IInvokedMethodListener allows you to be notified whenever TestNG is about to invoke a test annotated with Test or configuration annotated with any of the Before or After annotation method.
You need to implement the following interface: Overriding test methods TestNG allows you to override and possibly skip the invocation of test methods. One example of where this is useful is if you need to your test methods with a specific security manager.
You achieve this by providing a listener that implements IHookable. Here is an example with JAAS: A classic example for this would be to try and leverage your existing suite file and try using it for simulating a load test on your "Application under test". But this doesn't seem to scale a lot. TestNG allows you to alter a suite or a test tag in your suite xml file at runtime via listeners.
You achieve this by providing a listener that implements IAlterSuiteListener. Please refer to Listeners section to learn about listeners. Here is an example that shows how the suite name is getting altered in runtime: Through a Service Loader This listener cannot be added to execution using the Listeners annotation. Your test methods will typically be made of calls that can throw an exception, or of various assertions using the Java "assert" keyword.
An "assert" failing will trigger an AssertionErrorException, which in turn will mark the method as failed remember to use -ea on the JVM if you are not seeing the assertion errors. Note that the above code use a static import in order to be able to use the assertEquals method without having to prefix it by its class. Listeners implement the interface org. ITestListener and are notified in real time of when a test starts, passes, fails, etc Reporters implement the interface org.
IReporter and are notified when all the suites have been run by TestNG. The IReporter instance receives a list of objects that describe the entire test run. For example, if you want to generate a PDF report of your test run, you don't need to be notified in real time of the test run so you should probably use an IReporter. If you'd like to write a real-time reporting of your tests, such as a GUI with a progress bar or a text reporter displaying dots ".
Logging Listeners Here is a listener that displays a ". You can implement the interface directly if you prefer. Here is how I invoke TestNG to use this new listener: Shell java -classpath testng.