refactor!: make mersenne internal (#1444)

4 files changed, 14 insertions, 9 deletions

diff --git a/src/faker.ts b/src/faker.ts
index c42c313e..62a3bf6f 100644
--- a/src/faker.ts
+++ b/src/faker.ts
@@ -1,5 +1,6 @@
 import type { LocaleDefinition } from './definitions';
 import { FakerError } from './errors/faker-error';
+import { MersenneModule } from './internal/mersenne/mersenne';
 import type { KnownLocale } from './locales';
 import { AddressModule } from './modules/address';
 import { AnimalModule } from './modules/animal';
@@ -16,7 +17,6 @@ import { HelpersModule } from './modules/helpers';
 import { ImageModule } from './modules/image';
 import { InternetModule } from './modules/internet';
 import { LoremModule } from './modules/lorem';
-import { MersenneModule } from './modules/mersenne';
 import { MusicModule } from './modules/music';
 import { NameModule } from './modules/name';
 import { PhoneModule } from './modules/phone';
@@ -74,10 +74,9 @@ export class Faker {
 
   readonly definitions: LocaleDefinition = this.initDefinitions();
 
-  /**
-   * @internal
-   */
-  readonly mersenne: MersenneModule = new MersenneModule();
+  /** @internal */
+  private readonly _mersenne: MersenneModule = new MersenneModule();
+
   readonly random: RandomModule = new RandomModule(this);
 
   readonly helpers: HelpersModule = new HelpersModule(this);
@@ -241,9 +240,9 @@ export class Faker {
     seed: number | number[] = Math.ceil(Math.random() * Number.MAX_SAFE_INTEGER)
   ): number | number[] {
     if (Array.isArray(seed) && seed.length) {
-      this.mersenne.seed_array(seed);
+      this._mersenne.seed_array(seed);
     } else if (!Array.isArray(seed) && !isNaN(seed)) {
-      this.mersenne.seed(seed);
+      this._mersenne.seed(seed);
     }
 
     return seed;
diff --git a/src/modules/mersenne/index.ts b/src/internal/mersenne/mersenne.ts
index 16019e29..16019e29 100644
--- a/src/modules/mersenne/index.ts
+++ b/src/internal/mersenne/mersenne.ts
diff --git a/src/modules/mersenne/twister.ts b/src/internal/mersenne/twister.ts
index 5859f3ae..f7757842 100644
--- a/src/modules/mersenne/twister.ts
+++ b/src/internal/mersenne/twister.ts
@@ -68,8 +68,9 @@
  * Any feedback is very welcome.
  *   http://www.math.sci.hiroshima-u.ac.jp/~m-mat/MT/emt.html
  *   email: m-mat @ math.sci.hiroshima-u.ac.jp (remove space)
+ *
+ * @internal
  */
-
 export default class MersenneTwister19937 {
   private readonly N = 624;
   private readonly M = 397;
diff --git a/src/modules/datatype/index.ts b/src/modules/datatype/index.ts
index 336f8f9f..4c522d53 100644
--- a/src/modules/datatype/index.ts
+++ b/src/modules/datatype/index.ts
@@ -1,5 +1,6 @@
 import type { Faker } from '../..';
 import { FakerError } from '../../errors/faker-error';
+import type { MersenneModule } from '../../internal/mersenne/mersenne';
 
 /**
  * Module to generate various primitive values and data types.
@@ -54,8 +55,12 @@ export class DatatypeModule {
       throw new FakerError(`Max ${max} should be greater than min ${min}.`);
     }
 
+    const mersenne: MersenneModule =
+      // @ts-expect-error: access private member field
+      this.faker._mersenne;
+
     const randomNumber = Math.floor(
-      this.faker.mersenne.rand(max / precision + 1, min / precision)
+      mersenne.rand(max / precision + 1, min / precision)
     );
 
     // Workaround problem in float point arithmetics for e.g. 6681493 / 0.01