TestNG provides a way to get the data from external sources like from excel/textfile/arrays which helps to prepare data driven framework in automation.
@Parameters – pass parameters from the testNG.xml
@dataProvider – Pass the parameters as a 2D array.
In this post, we will look into dataProvider
@DataProvider
This is another way of passing 2 dimensional array as parameter from a method of same or from different class, let’s see one by one.
the @Test method will run number of times depends on the number of data sets provided in the object array.
From same class
package annotationpkg;
import org.testng.annotations.DataProvider;
import org.testng.annotations.Test;
public class dataprovider {
@DataProvider(name = "data-provider")
public Object[][] dataProviderArr() {
//Create 2 diemensional array
//can even take the data from an excel sheet or from a Map
//and put it into this array variable
String object[][] = { { "user1", "1234" }, { "user2", "5678" } };
return object;
}
@Test(dataProvider = "data-provider")
public void fn_Credentials(String userName, String password) {
System.out.print("UserName is: " + userName);
System.out.print(" | ");
System.out.println("Password is: "+ password);
}
}Let’s say we have the public Object[][] dataProviderArr() method defined in another class (dataProviderArray.class), then we can write:
From another class
public class dataProviderArray{
@DataProvider(name = "data-provider")
public Object[][] dataProviderArr() {
//Create 2 diemensional array
//can even take the data from an excel sheet or from a Map
//and put it into this array variable
Object[][] obj= { { "user1", "1234" }, { "user2", "5678" } };
return obj;
}package annotationpkg;
import org.testng.annotations.DataProvider;
import org.testng.annotations.Test;
public class dataprovider {
@Test(dataProvider = "data-provider", dataProviderClass = dataProviderArray.class)
public void fn_Credentials(String userName, String password) {
System.out.print("UserName is: " + userName);
System.out.print(" | ");
System.out.println("Password is: "+ password);
}
}The TestNG.xml looks like (for from same and another class)
<xml version="1.0" encoding="utf-8"?>
<Suite name="MySuite" parallel="none">
<test name="Test1">
<CLasses>
<class name="annotationpkg.dataprovider"/>
</classes>
</test>
</suite>
If you are good with the above feature, then look for the implementation with selenium, refer below –
Use dataProvider in selenium test
Pass excel data to testNG dataProvider and run selenium tests
Let’s see some more details about the testNG, @Test annotation attributes
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