feat: migrate music (#107)

Author: Shinigami92

src/index.ts

@@ -10,6 +10,7 @@ import { Helpers } from './helpers';
 import { Image } from './image';
 import { Internet } from './internet';
 import { Mersenne } from './mersenne';
+import { Music } from './music';
 import { Name } from './name';
 import { Phone } from './phone_number';
 import { Random } from './random';
@@ -190,7 +191,7 @@ export class Faker {
   readonly image: Image = new Image(this);
   readonly internet: Internet = new Internet(this);
   readonly lorem = new (require('./lorem'))(this);
-  readonly music = new (require('./music'))(this);
+  readonly music: Music = new Music(this);
   readonly name: Name = new Name(this);
   readonly phone: Phone = new Phone(this);
   readonly system: System = new System(this);

src/music.ts

@@ -0,0 +1,29 @@
+import type { Faker } from '.';
+
+export class Music {
+  constructor(private readonly faker: Faker) {
+    // Bind `this` so namespaced is working correctly
+    for (const name of Object.getOwnPropertyNames(Music.prototype)) {
+      if (name === 'constructor' || typeof this[name] !== 'function') {
+        continue;
+      }
+      this[name] = this[name].bind(this);
+    }
+
+    // TODO @Shinigami92 2022-01-12: We should find a better strategy as assigning this property to a function
+    // @ts-expect-error
+    this.genre.schema = {
+      description: 'Generates a genre.',
+      sampleResults: ['Rock', 'Metal', 'Pop'],
+    };
+  }
+
+  /**
+   * genre
+   *
+   * @method faker.music.genre
+   */
+  genre(): string {
+    return this.faker.random.arrayElement(this.faker.definitions.music.genre);
+  }
+}