Benefits, Hierarchy & Prioritization in TESTNG

 Benefits Of TestNG Annotations

Let's talk about the benefits of TestNG Annotations.

• TestNG annotations help provide a thorough and complete test report with information on the number of test cases executed, passed test cases, failed test cases, and skipped test cases.

• The testing.xml file allows for simple grouping of many test scenarios. Furthermore, test cases can be prioritised for execution.

• Using the keyword 'invocation count,' TestNG Annotations can run the same test case many times.

• TestNG annotations are simple to comprehend.

• TestNG Annotations allow for simplified test code, hence removing the need for a static primary method.

• TestNG facilitates the grouping and execution of test cases.

• TestNG allows programmers to prioritise test cases depending on their requirements.

• TestNG helps in the concurrent execution of test cases.

• TestNG is an excellent tool for generating reports based on test results.

• TestNG is strongly typed, indicating that it can do solid error checking.

• TestNG has the ability to connect to external data sources.

• There is no necessity to follow a pattern or format while executing test cases.

• TestNG annotations can accept additional parameters.

• There is no necessity to extend any test classes when using TestNG annotations.

• Because TestNG Annotations are highly typed, errors can be detected at compile time.

 

Hierarchy of the TestNG Annotations:

 

When you're testing software, TestNG offers a number of annotations to assist you write good test source code. So, how does TestNG determine which test case should be performed first, then the next, and so on? The answer is a hierarchy in these annotations. As a result, the annotations in testNG have a hierarchy. The following is the hierarchy (with the highest priority at the top):

• @BeforeSuite
• @BeforeTest
• @BeforeClass
• @BeforeMethod
• @Test
• @AfterMethod
• @AfterClass
• @AfterTest
• @AfterSuite

 

TestNG Prioritization 

 

Prioritization in TestNG is a technique for assigning a sequence to methods so that they don't run in the wrong order. Because TestNG's alphabetically running test cases have no logical sequence, assigning priority to these test cases helps us manage the execution of our tests.

Priority is a parameter in TestNG test cases that has a distinctive value as a priority.

We can use the priority as an additional option with the test annotations. This attribute defines the annotation's importance. However, keep in mind that the priority check comes after TestNG's annotation check. As a result, the TestNG annotation hierarchy comes first, followed by priority-based execution.

In TestNG, the following points about priority must be taken into account:

• In TestNG test methods, only @Test methods can be used to define Priority.

• When the priority number is smaller, the test case method has a greater priority.

• Only integer values are used in Priority in TestNG. The value can be 0 (zero), a negative number, or a positive number.

• If a priority is expressed in decimal, it must first be converted to an integer in TestNG (through typecasting).

• In TestNG, only one process is allowed to have a single priority.

• Priority is not able to pass across XML files.

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