Test Case Generation | Set 2 ( Random Characters, Strings and Arrays of Random Strings)
Last Updated :
31 Jan, 2024
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);
}
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);
}
}
}
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)
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
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);
}
import java.util.Random;
public class RandomStringGenerator {
private static final int RUN = 100000;
private static final int MAX = 25;
private static final int MAXLEN = 100;
public static void main(String[] args) {
Random random = new Random();
StringBuilder stringBuilder = new StringBuilder();
for (int i = 1; i <= RUN; i++) {
int length = 1 + random.nextInt(MAXLEN);
// Append the length of the string to StringBuilder
stringBuilder.append(length).append('\n');
// Append the characters of the string to StringBuilder
for (int j = 1; j <= length; j++) {
char randomChar = (char) ('a' + random.nextInt(MAX));
stringBuilder.append(randomChar);
}
// Print the complete string at once
System.out.print(stringBuilder.toString());
stringBuilder.setLength(0); // Clear StringBuilder
}
}
}
# Python program to generate test cases for random strings
import random
import string
# Define the number of runs for the test data generated
RUN = 100000
# Define the range of the test data generated
# Here it is 'a' to 'z'
MAX = 25
# Define the maximum length of the string
MAXLEN = 100
def generate_random_string(length):
"""Generate a random string of given length."""
return ''.join(random.choice(string.ascii_lowercase) for _ in range(length))
def main():
# Uncomment the below line to store
# the test data in a file
# with open("Test_Cases_Random_String.in", "w") as f:
for i in range(1, RUN + 1):
# Generate a random length for the string
length = 1 + random.randint(0, MAXLEN)
# First print the length of the string
print(length)
# Then print the characters of the string
random_str = generate_random_string(length)
print(random_str)
# Uncomment the below line to store
# the test data in a file
# f.close()
if __name__ == "__main__":
# For random values every time
random.seed()
# Call the main function
main()
using System;
using System.Text;
class Program
{
const int RUN = 100000;
const int MAX = 25;
const int MAXLEN = 100;
static void Main()
{
// Uncomment the below line to store the test data in a file
// using (System.IO.StreamWriter file = new System.IO.StreamWriter("Test_Cases_Random_String.txt"))
{
Random random = new Random();
StringBuilder stringBuilder = new StringBuilder();
for (int i = 1; i <= RUN; i++)
{
int length = 1 + random.Next(MAXLEN);
// First append the length of the string to StringBuilder
stringBuilder.AppendLine(length.ToString());
// Then append the characters of the string to StringBuilder
for (int j = 1; j <= length; j++)
{
char randomChar = (char)('a' + random.Next(MAX));
stringBuilder.Append(randomChar);
}
// Print the complete string at once
Console.Write(stringBuilder.ToString());
stringBuilder.Clear();
}
// Uncomment the below line to store the test data in a file
// file.Close();
}
}
}
// 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);
}
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();
}
}
# 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()
// 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();
}
}
// 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());
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