randomFloatInRange

1/**
2 * Generates a random floating-point number between min (inclusive) and max (exclusive).
3 *
4 * @param min - Minimum value (inclusive).
5 * @param max - Maximum value (exclusive).
6 * @returns A random float between min and max.
7 */
8export function randomFloatInRange(min: number, max: number): number {
9  return Math.random() * (max - min) + min;
10}

1test('randomFloatInRange - basic range', () => {
2  const value = randomFloatInRange(1, 5);
3  expect(value).toBeGreaterThanOrEqual(1);
4  expect(value).toBeLessThan(5);
5});
6
7test('randomFloatInRange - negative range', () => {
8  const value = randomFloatInRange(-10, -5);
9  expect(value).toBeGreaterThanOrEqual(-10);
10  expect(value).toBeLessThan(-5);
11});
12
13test('randomFloatInRange - min and max very close', () => {
14  const value = randomFloatInRange(0.999, 1);
15  expect(value).toBeGreaterThanOrEqual(0.999);
16  expect(value).toBeLessThan(1);
17});
18
19test('randomFloatInRange - edge case: min == max', () => {
20  const result = () => randomFloatInRange(2, 2);
21  expect(result).not.toThrow(); // it will return NaN, which is acceptable in undefined case
22  expect(Number.isNaN(result())).toBe(true);
23});