How to read csv data one by one and pass it in multiple testNG tests - csv

Question

I need to insert a data multiple times in an web application. I am using selenium with testNG along with data driven framework.
I am using CSV file for reading the the input values.
Please find the sample code below.
public class TestData
{
private static String firstName;
public static String lastName;
#BeforeClass
public void beforeClass() throws IOException
{
reader = new CSVReader(new FileReader(fileName));
while((record = reader.readNext()) != null)
{
firstName = record[0];
lastName = record[1];
}
}
#Test
public void test1()
{
driver.findElement(By.id(id)).sendKeys(firstName);
driver.findElement(By.id(id)).click();
and so on....
}
#Test
public void test2()
{
driver.findElement(By.id(id)).sendKeys(lastName);
driver.findElement(By.id(id)).click();
and so on....
}
}
Here, I need to insert 3 records, but when I use the above code, only the 3rd record gets inserted.
Kindly help me to fix this issue.
Sample Input File

Answer 1

What you need here is a Factory powered by a DataProvider. The Factory would produce test class instances (A test class here is basically a regular class that contains one or more #Test methods housed in it). The data provider would basically feed the factory method with the data required to instantiate the test class.
Now your #Test methods would basically work with the data members in the instances to run its logic.
Here's a simple sample that shows this in action.
import org.assertj.core.api.Assertions;
import org.testng.annotations.DataProvider;
import org.testng.annotations.Factory;
import org.testng.annotations.Test;
public class TestClassSample {
private String firstName;
private String lastName;
#Factory(dataProvider = "dp")
public TestClassSample(String firstName, String lastName) {
this.firstName = firstName;
this.lastName = lastName;
}
#DataProvider(name = "dp")
public static Object[][] getData() {
//feel free to replace this with the logic that reads up a csv file (using CSVReader)
// and then translates it to a 2D array.
return new Object[][]{
{"Mohan", "Kumar"},
{"Kane", "Williams"},
{"Mark", "Henry"}
};
}
#Test
public void test1() {
Assertions.assertThat(this.firstName).isNotEmpty();
}
#Test
public void test2() {
Assertions.assertThat(this.lastName).isNotEmpty();
}
}

Answer 2

As per the data given by you , the while loop ends at the third record of CSV file. In each iteration your variables "firstName" and "lastName" are overwritten.
When the loop breaks , the variables store the lastly written values. So , use a better data structure for storing all values. I recommend map.
You can further club all the test cases in a single method , use invocationcount attribute in #Test annotation to repeat the execution for each entry from map. Add one more method with #BeforeTest for increment to next keyset in map.