Test Case Generation | Set 2 ( Random Characters, Strings and Arrays of Random Strings)

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Set 1 (Random Numbers, Arrays and Matrices)

Generating Random Characters

CPP

// A C++ Program to generate test cases for
// random characters
#include<bits/stdc++.h>
using namespace std;
 
// Define the number of runs for the test data
// generated
#define RUN 5
 
// Define the range of the test data generated
// Here it is 'a' to 'z'
#define MAX 25
 
int main()
{
    // Uncomment the below line to store
    // the test data in a file
    // freopen ("Test_Cases_Random_Character.in", "w", stdout);
 
    // For random values every time
    srand(time(NULL));
 
    for (int i=1; i<=RUN; i++)
        printf("%c\n", 'a' + rand() % MAX);
 
    // Uncomment the below line to store
    // the test data in a file
    // fclose(stdout);
    return(0);
}

Java

import java.util.Random;
 
class GeneratingRandomCharacters {
// Define the number of runs for the test data generated
static final int RUN = 5;
 
// Define the range of the test data generated
// Here it is 'a' to 'z'
static final int MAX = 25;
 
public static void main(String[] args) {
    Random rand = new Random();
    for (int i = 0; i < RUN; i++) {
        char randomChar = (char) ('a' + rand.nextInt(MAX));
        System.out.println(randomChar);
    }
}
}

Python3

import random
 
# Define the number of runs for the test data generated
RUN = 5
 
# Define the range of the test data generated
# Here it is 'a' to 'z'
MAX = 25
 
for i in range(RUN):
    random_char = chr(ord('a') + random.randint(0, MAX))
    print(random_char)

C#

using System;
 
namespace RandomCharacterTestCases
{
    class Program
    {
        // Define the number of runs for the test data
        // generated
        const int RUN = 5;
 
        // Define the range of the test data generated
        // Here it is 'a' to 'z'
        const int MAX = 25;
 
        static void Main(string[] args)
        {
            // Uncomment the below line to store
            // the test data in a file
            // Console.SetOut(new System.IO.StreamWriter("Test_Cases_Random_Character.in"));
 
            // For random values every time
            Random rnd = new Random();
 
            for (int i = 1; i <= RUN; i++)
            {
                Console.WriteLine((char)('a' + rnd.Next(MAX)));
            }
 
            // Uncomment the below line to store
            // the test data in a file
            // Console.Out.Close();
        }
    }
}
// This code is contributed by divyansh2212

Javascript

let requiredNumbers = 5;
let lowerBound = 0;
let upperBound = 25;
 
for(let i = 0; i < requiredNumbers; i++)
{
    let a = String.fromCharCode(97 + Math.floor(Math.random() * 
    (upperBound - lowerBound)) + lowerBound);
    console.log(a);
}
 
// This code is contributed by Shubham Singh

Generating Random Strings

CPP

// A C++ Program to generate test cases for
// random strings
#include<bits/stdc++.h>
using namespace std;
 
// Define the number of runs for the test data
// generated
#define RUN 100000
 
// Define the range of the test data generated
// Here it is 'a' to 'z'
#define MAX 25
 
// Define the maximum length of string
#define MAXLEN 100
 
int main()
{
    // Uncomment the below line to store
    // the test data in a file
    // freopen ("Test_Cases_Random_String.in", "w", stdout);
 
    //For random values every time
    srand(time(NULL));
 
    int LEN; // Length of string
 
    for (int i=1; i<=RUN; i++)
    {
        LEN = 1 + rand() % MAXLEN;
 
        // First print the length of string
        printf("%d\n", LEN);
 
        // Then print the characters of the string
        for (int j=1; j<=LEN; j++)
            printf("%c", 'a' + rand() % MAX);
 
        printf("\n");
    }
 
    // Uncomment the below line to store
    // the test data in a file
    // fclose(stdout);
    return(0);
}

Javascript

// Define the number of runs for the test data generated
const RUN = 100000;
 
// Define the range of the test data generated
// Here it is 'a' to 'z'
const MAX = 25;
 
// Define the maximum length of string
const MAXLEN = 100;
 
// driver program
// For random values every time
let LEN; // Length of string
 
for (let i = 1; i <= RUN; i++) {
  LEN = 1 + Math.floor(Math.random() * MAXLEN);
 
  // First print the length of string
  console.log(LEN);
 
  // Then print the characters of the string
  let str = "";
  for (let j = 1; j <= LEN; j++)
      str += String.fromCharCode(97 + Math.floor(Math.random() * MAX));
  console.log(str);
}

Generating Array of Random Strings

CPP

// A C++ Program to generate test cases for
// random strings
#include<bits/stdc++.h>
using namespace std;
 
// Define the number of runs for the test data
// generated
#define RUN 1000
 
// Define the range of the test data generated
// Here it is 'a' to 'z'
#define MAX 25
 
// Define the range of number of strings in the array
#define MAXNUM 20
 
// Define the maximum length of string
#define MAXLEN 20
 
int main()
{
    // Uncomment the below line to store
    // the test data in a file
    // freopen ("Test_Cases_Array_of_Strings.in", "w", stdout);
 
    //For random values every time
    srand(time(NULL));
 
    int NUM; // Number of strings in array
 
    int LEN; // Length of string
 
    for (int i=1; i<=RUN; i++)
    {
        NUM = 1 + rand() % MAXNUM;
        printf("%d\n", NUM);
 
        for (int k=1; k<=NUM; k++)
        {
            LEN = 1 + rand() % MAXLEN;
 
            // Then print the characters of the string
            for (int j=1; j<=LEN; j++)
                printf("%c", 'a' + rand() % MAX);
 
            printf(" ");
        }
        printf("\n");
    }
    // Uncomment the below line to store
    // the test data in a file
    // fclose(stdout);
    return(0);
}

Java

import java.util.Random;
 
public class Main {
 
    // Define the number of runs for the test data generated
    private static final int RUN = 1000;
 
    // Define the range of the test data generated
    // Here it is 'a' to 'z'
    private static final int MAX = 25;
 
    // Define the range of number of strings in the array
    private static final int MAXNUM = 20;
 
    // Define the maximum length of string
    private static final int MAXLEN = 20;
 
    public static void main(String[] args)
    {
 
        // Uncomment the below line to store
        // the test data in a file
        // System.setOut(new PrintStream(new
        // File("Test_Cases_Array_of_Strings.in")));
 
        // For random values every time
        Random rand = new Random();
 
        int NUM; // Number of strings in array
 
        int LEN; // Length of string
 
        for (int i = 1; i <= RUN; i++) {
            NUM = 1 + rand.nextInt(MAXNUM);
            System.out.println(NUM);
 
            for (int k = 1; k <= NUM; k++) {
                LEN = 1 + rand.nextInt(MAXLEN);
 
                // Then print the characters of the string
                for (int j = 1; j <= LEN; j++)
                    System.out.print(
                        (char)('a' + rand.nextInt(MAX)));
 
                System.out.print(" ");
            }
            System.out.println();
        }
 
        // Uncomment the below line to store
        // the test data in a file
        // System.out.close();
    }
}

Python3

# A Python3 program to generate test cases for random strings
import random
import string
 
# Define the number of runs for the test data generated
RUN = 1000
 
# Define the range of the test data generated
# Here it is 'a' to 'z'
MAX = 25
 
# Define the range of number of strings in the array
MAXNUM = 20
 
# Define the maximum length of string
MAXLEN = 20
 
# Uncomment the below line to store
# the test data in a file
# sys.stdout = open("Test_Cases_Array_of_Strings.in", "w")
 
for i in range(RUN):
    NUM = random.randint(1, MAXNUM)
    print(NUM)
 
    for k in range(NUM):
        LEN = random.randint(1, MAXLEN)
 
        # Then print the characters of the string
        s = ''.join(random.choices(string.ascii_lowercase, k=LEN))
        print(s, end=' ')
 
    print()
# Uncomment the below line to store
# the test data in a file
# sys.stdout.close()

C#

// A C# Program to generate test cases for
// random strings
using System;
using System.IO;
 
class Program {
    // Define the number of runs for the test data generated
    const int RUN = 1000;
 
    // Define the range of the test data generated
    // Here it is 'a' to 'z'
    const int MAX = 25;
 
    // Define the range of number of strings in the array
    const int MAXNUM = 20;
 
    // Define the maximum length of string
    const int MAXLEN = 20;
 
    static void Main()
    {
        // Uncomment the below line to store
        // the test data in a file
        // Console.SetOut(new
        // StreamWriter("Test_Cases_Array_of_Strings.in"));
 
        // For random values every time
        Random random = new Random();
 
        int NUM; // Number of strings in array
        int LEN; // Length of string
 
        for (int i = 1; i <= RUN; i++) {
            NUM = 1 + random.Next(MAXNUM);
            Console.WriteLine(NUM);
 
            for (int k = 1; k <= NUM; k++) {
                LEN = 1 + random.Next(MAXLEN);
 
                // Then print the characters of the string
                for (int j = 1; j <= LEN; j++) {
                    Console.Write(
                        (char)('a' + random.Next(MAX)));
                }
 
                Console.Write(" ");
            }
 
            Console.WriteLine();
        }
 
        // Uncomment the below line to store
        // the test data in a file
        // Console.Out.Close();
    }
}

Javascript

// Define the number of runs for the test data generated
const RUN = 1000;
 
// Define the range of the test data generated
// Here it is 'a' to 'z'
const MAX = 25;
 
// Define the range of number of strings in the array
const MAXNUM = 20;
 
// Define the maximum length of string
const MAXLEN = 20;
 
function generateTestData() {
let result = "";
 
// For random values every time
const rand = new Math.seedrandom();
 
let NUM; // Number of strings in array
 
let LEN; // Length of string
 
for (let i = 1; i <= RUN; i++) {
NUM = 1 + Math.floor(rand() * MAXNUM);
result += NUM + "\n";
for (let k = 1; k <= NUM; k++) {
  LEN = 1 + Math.floor(rand() * MAXLEN);
 
  // Then print the characters of the string
  let str = "";
  for (let j = 1; j <= LEN; j++) {
    str += String.fromCharCode(97 + Math.floor(rand() * MAX));
  }
 
  result += str + " ";
}
result += "\n";
}
 
return result;
}
 
// Uncomment the below line to store
// the test data in a file
// fs.writeFileSync('Test_Cases_Array_of_Strings.in', generateTestData());

This article is contributed by Rachit Belweriar. If you like zambiatek and would like to contribute, you can also write an article using write.zambiatek.com or mail your article to review-team@zambiatek.com. See your article appearing on the zambiatek main page and help other Geeks.
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