TECH KNOW STUDY

Difference between Regression and Re-testing

Print JMETER "HTTP Request" Parameters Value into a CSV File

• Some time we have a requirement like to geneterate a Value like "CID167" where "CID" is fixed and "167" is random number. Also pass that value into a parameter name(Ex. Here customerID and system_customerID ) and write that value to csv file.
  
  So here i am suggesting some solution may be this is use full for you guys.
• Now fallow these Steps to complete your requirement.


• Add Random variable inside that Transaction where you need to generate that variable

• Open HTTP Request of that Transaction where you have to substitute parameter value with Random Variable "Variable Name".
• Substitute that parameter value. Ex.

• Now to write that parameter value into CSV file add a BanShell PostProcessor  inside that HTTP Request. And the code of BeanShell PostProcessor is:-

• Open the path given in BeanShell PostProcessor (Ex./my/file/path/).
• Open the generated CSV file (Ex.output.csv) and see desired result.

Reading a file through Bean Shell in Jmeter

We can read a file in JMeter using different Classes and These are below.

       1.FileReader class

       2.FileInputStream class

Now if we try to dig little deep about these classes,First we need to know when to use "InputStream" and when to go for "Reader". Main difference between them is, InputStream is used to read binary data, while Reader is used to read text data.

An InputStream is the method of getting information from resource. It observe the data byte by byte without performing any kind of translation. If you are reading image data, or any binary file, this method is used.

A Reader is used for character streams. If the information you are reading is all text, then the Reader will take care of the character decoding for you and give you unicode characters from the raw input stream. If you are reading any type of text, this method is used.

Now other thing is we can read the file in two ways,

            1. char by char.

            2. line by line.

1. File Reader - Read Char by char:
import java.io.FileReader;

FileReader fileReader=new FileReader("Path/Example.txt");
int i =fileReader.read();
while(i!=-1)

{
  System.out.print((char)i);
  i=fileReader.read();
}

2. File Reader - Read line by line:
import java.io.FileReader;
FileReader fileReader=new FileReader("Path/Example.txt");
BufferedReader bufferReader= new BufferedReader(fileReader);
String line=bufferReader.readLine();
while(line!=null)

{
    System.out.println(line);
    line=bufferReader.readLine();
}
   fileReader.close();
   bufferReader.close();

3. File Input Stream- Read Char by char :
import java.io.FileInputStream;System.out.println("Method");

FileInputStream fileInputStream=new FileInputStream("Path/Example.txt");

int i=fileInputStream.read();

while (i!=-1)

{

System.out.print((char)i);

i=fileInputStream.read();

}

fileInputStream.close();

4. File Input Stream -Read line by line:
import java.io.FileInputStream;
FileInputStream fileInputStream= new FileInputStream("Path/Example.txt");
InputStreamReader inputStreamReader=new InputStreamReader(fileInputStream);//An InputStreamReader is a bridge from byte streams to character streams
BufferedReader br = new BufferedReader(inputStreamReader);
String line=br.readLine();
while(line!= null)
{
  System.out.println(line);
      line=br.readLine();
}
  inputStreamReader.close(); 
  fileInputStream.close();

Notes:-
1.path:- It is the location where your resource file is present.

• A login user control is best example for this having username and password fields and button. With the help of web user control we can create one single login control and then put it into numbers of pages of your website.
• That reduce your work for again and again creation of login fields in every page.
• We can call user control created into .ASCX page in every .ASPX page through some sort of lines.