test: rewrite music tests (#383)

test/music.spec.ts

@@ -1,14 +1,70 @@
-import { describe, expect, it } from 'vitest';
+import { beforeEach, describe, expect, it } from 'vitest';
 import { faker } from '../dist/cjs';
 
-faker.seed(1234);
+const seededRuns = [
+  {
+    seed: 42,
+    expectations: {
+      genre: {
+        noArgs: 'Country',
+      },
+    },
+  },
+  {
+    seed: 1337,
+    expectations: {
+      genre: {
+        noArgs: 'Folk',
+      },
+    },
+  },
+  {
+    seed: 1211,
+    expectations: {
+      genre: {
+        noArgs: 'Non Music',
+      },
+    },
+  },
+];
+
+const functionNames = ['genre'];
+
+const NON_SEEDED_BASED_RUN = 5;
 
 describe('music', () => {
-  describe('genre()', () => {
-    it('returns a genre', () => {
-      const genre = faker.music.genre();
+  beforeEach(() => {
+    faker.locale = 'en';
+  });
+
+  for (const { seed, expectations } of seededRuns) {
+    describe(`seed: ${seed}`, () => {
+      for (const functionName of functionNames) {
+        it(`${functionName}()`, () => {
+          faker.seed(seed);
 
-      expect(genre).toBe('Electronic');
+          const actual = faker.music[functionName]();
+
+          expect(actual).toEqual(expectations[functionName].noArgs);
+        });
+      }
     });
+  }
+
+  // Create and log-back the seed for debug purposes
+  faker.seed(Math.ceil(Math.random() * 1_000_000_000));
+
+  describe(`random seeded tests for seed ${faker.seedValue}`, () => {
+    for (let i = 1; i <= NON_SEEDED_BASED_RUN; i++) {
+      describe('genre()', () => {
+        it('should return a genre', () => {
+          const genre = faker.music.genre();
+
+          expect(genre).toBeTruthy();
+          expect(typeof genre).toBe('string');
+          expect(faker.definitions.music.genre).toContain(genre);
+        });
+      });
+    }
   });
 });