feat: add sample JavaScript script with 7 functions

tests/fixtures/sample-code-base/sample.js

@@ -0,0 +1,50 @@
+// Sample JavaScript script with 7 functions
+
+// 1. A simple greeting function
+function greet(name) {
+    return `Hello, ${name}!`;
+}
+
+// 2. A function to calculate the area of a circle
+function calculateCircleArea(radius) {
+    return Math.PI * radius * radius;
+}
+
+// 3. A function to check if a number is prime
+function isPrime(number) {
+    if (number <= 1) return false;
+    for (let i = 2; i <= Math.sqrt(number); i++) {
+        if (number % i === 0) return false;
+    }
+    return true;
+}
+
+// 4. A function to reverse a string
+function reverseString(str) {
+    return str.split('').reverse().join('');
+}
+
+// 5. A function to generate a random number within a range
+function getRandomNumber(min, max) {
+    return Math.floor(Math.random() * (max - min + 1)) + min;
+}
+
+// 6. A function to filter out even numbers from an array
+function filterEvenNumbers(numbers) {
+    return numbers.filter(num => num % 2 !== 0);
+}
+
+// 7. A function to calculate the factorial of a number
+function factorial(n) {
+    if (n === 0 || n === 1) return 1;
+    return n * factorial(n - 1);
+}
+
+// Example usage
+console.log(greet("Alice"));
+console.log(calculateCircleArea(5));
+console.log(isPrime(17));
+console.log(reverseString("JavaScript"));
+console.log(getRandomNumber(1, 100));
+console.log(filterEvenNumbers([1, 2, 3, 4, 5, 6, 7, 8, 9, 10]));
+console.log(factorial(5));