return crypto.randomBytes(4).readUInt32LE() / 0x100000000
}
+/**
+ * Generate a cryptographically secure random number in the [0,1[ range
+ *
+ * @returns
+ */
+function secureRandomWithRandomValues () {
+ return crypto.getRandomValues(new Uint32Array(1))[0] / 0x100000000
+}
+
/**
* @param max
* @param min
* @returns
*/
function generateRandomInteger (max = Number.MAX_SAFE_INTEGER, min = 0) {
- if (max < 0) {
+ if (max < min || max < 0 || min < 0) {
throw new RangeError('Invalid interval')
}
max = Math.floor(max)
- if (min) {
- if (max < min || min < 0) {
- throw new RangeError('Invalid interval')
- }
+ if (min != null && min !== 0) {
min = Math.ceil(min)
return Math.floor(secureRandom() * (max - min + 1)) + min
}
return Math.floor(secureRandom() * (max + 1))
}
+/**
+ *
+ * @param max
+ * @param min
+ * @returns
+ */
+function generateRandomFloat (max = Number.MAX_VALUE, min = 0) {
+ if (max < min) {
+ throw new RangeError('Invalid interval')
+ }
+ if (max - min === Infinity) {
+ throw new RangeError('Invalid interval')
+ }
+ return (crypto.randomBytes(4).readUInt32LE() / 0xffffffff) * (max - min) + min
+}
+
/**
*
* @param size
* @param max
+ * @param numberGenerator
+ * @returns
+ */
+function generateRandomNumberArray (
+ size,
+ max = Number.MAX_VALUE,
+ numberGenerator = generateRandomFloat
+) {
+ const array = []
+ for (let i = 0; i < size; i++) {
+ array.push(numberGenerator(max))
+ }
+ return array
+}
+
+/**
+ *
+ * @param sizeMax
+ * @param numberMax
+ * @param numberGenerator
+ * @returns
*/
-function generateRandomIntegerArray (size, max = Number.MAX_SAFE_INTEGER) {
- const integerArray = []
+function generateRandomObject (
+ sizeMax = 500,
+ numberMax = Number.MAX_VALUE,
+ numberGenerator = generateRandomFloat
+) {
+ const size = generateRandomInteger(sizeMax)
+ const object = {}
for (let i = 0; i < size; i++) {
- integerArray.push(generateRandomInteger(max))
+ object[i.toString()] = numberGenerator(numberMax)
}
- return integerArray
+ return object
}
/**
return new Promise(resolve => setTimeout(resolve, ms))
}
-const LIST_FORMATTER = new Intl.ListFormat('en-US', {
- style: 'long',
- type: 'conjunction'
-})
-
module.exports = {
generateRandomInteger,
- generateRandomIntegerArray,
+ generateRandomFloat,
+ generateRandomNumberArray,
+ generateRandomObject,
sleep,
secureRandom,
- LIST_FORMATTER
+ secureRandomWithRandomValues
}