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How to get current class name from BeforeClass in TestNG?
TestNG supports native dependency injection. It allows to declare additional parameters in methods. At the run time, TestNG automatically fill these parameters with right value. Following are few native dependencies in TestNG:
ITestContext
XmlTest
Method
ITestResult
These dependencies help to retrieve the test class name depends on where these are called. If user wants to retrieve test class name before execution, the best place is @BeforeClass.
@BeforeClass supports ITestContext and XmlTest.
However, the full access of these dependencies is as following:
Annotation |
ITestContext |
XmlTest |
Method |
ITestResult |
|---|---|---|---|---|
BeforeSuite |
Yes |
No |
No |
No |
BeforeTest |
Yes |
Yes |
No |
No |
BeforeGroups |
Yes |
Yes |
No |
No |
BeforeClass |
Yes |
Yes |
No |
No |
BeforeMethod |
Yes |
Yes |
Yes |
Yes |
Test |
Yes |
No |
No |
No |
AfterMethod |
Yes |
Yes |
Yes |
Yes |
AfterClass |
Yes |
Yes |
No |
No |
AfterGroups |
Yes |
Yes |
No |
No |
AfterTest |
Yes |
Yes |
No |
No |
AfterSuite |
Yes |
No |
No |
No |
In this article, we will use ITestContext dependency to show how to retrieve test class name as well as without using any dependency.
Scenario 1
When user wants to retrieve the name of test class before the execution. In this case, code will be written inside @BeforeClass to retrieve current class name that will be executed.
As @BeforeClass executes at first, class name will be printed before execution of any test methods.
Approach/Algorithm to solve this problem
Step 1: Create a TestNG classes − NewTestngClass
Step 2: Write the following code inside @BeforeClass in the class;
public void name(ITestContext context) {
System.out.println("in beforeclass of NewTestngClass");
System.out.println("Test Class name using ITestContext is:"+context. getCurrentXmlTest().getClasses().stream().findFirst().get().getName());
System.out.println("Test Class name without using ITestContext is:"+this.getClass().getName());
}
The first line will print in which class we are present. It is hard− coded.
The 2nd line of code will print the test class name at runtime using ITestContext Dependency.
The 3rd line of code will print the test class name at run time without using any dependency.
Step 3: Now create the testNG.xml as given below to run the TestNG classes.
Step 4: Now, run the testNG.xml or directly testNG class in IDE or compile and run it using command line.
Example
The following code for common TestNG class − NewTestngClass:
src/ NewTestngClass.java
import org.testng.ITestContext;
import org.testng.annotations.*;
public class NewTestngClass {
// test case 1
@Test()
public void testCase1() {
System.out.println("in test case 1 of NewTestngClass");
}
// test case 2
@Test()
public void testCase2() {
System.out.println("in test case 2 of NewTestngClass");
}
@BeforeClass
public void name(ITestContext context) {
System.out.println("in beforeclass of NewTestngClass");
System.out.println("Test Class name using ITestContext is:"+context. getCurrentXmlTest().getClasses().stream().findFirst().get().getName());
System.out.println("Test Class name without using ITestContext is:"+this.getClass().getName());
}
}
testng.xml
This is a configuration file that is used to organize and run the TestNG test cases.
It is very handy when limited tests are needed to execute rather than full suite.
<?xml version = "1.0" encoding = "UTF-8"?>
<!DOCTYPE suite SYSTEM "http://testng.org/testng-1.0.dtd" >
<suite name = "Suite1" parallel = "none">
<test name = "test1" preserve-order = "true">
<classes>
<class name = "NewTestngClass"/>
</classes>
</test>
</suite>
Output
in beforeclass of NewTestngClass Test Class name using ITestContext is: NewTestngClass Test Class name without using ITestContext is: NewTestngClass in test case 1 of NewTestngClass in test case 2 of NewTestngClass =============================================== Suite1 Total tests run: 2, Passes: 2, Failures: 0, Skips: 0 ===============================================
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