fix: mersenne rand invalid input argument (#577)

1 files changed, 6 insertions, 7 deletions

diff --git a/src/mersenne.ts b/src/mersenne.ts
index 6539d738..521456a1 100644
--- a/src/mersenne.ts
+++ b/src/mersenne.ts
@@ -22,18 +22,17 @@ export class Mersenne {
    * Generates a random number between `[min, max)`.
    *
    * @param max The maximum number. Defaults to `0`.
-   * @param min The minimum number. Defaults to `32768`. Required if `max` is set.
+   * @param min The minimum number. Defaults to `32768`.
    *
    * @example
    * faker.mersenne.rand() // 15515
    * faker.mersenne.rand(500, 1000) // 578
    */
-  rand(max?: number, min?: number): number {
-    // TODO @Shinigami92 2022-01-11: This is buggy, cause if min is not passed but only max,
-    // then min will be undefined and this result in NaN for the whole function
-    if (max === undefined) {
-      min = 0;
-      max = 32768;
+  rand(max = 32768, min = 0): number {
+    if (min > max) {
+      const temp = min;
+      min = max;
+      max = temp;
     }
 
     return Math.floor(this.gen.genrandReal2() * (max - min) + min);