test: rewrite time tests (faker-js#421)

Author: Shinigami92

test/time.spec.ts

@@ -1,23 +1,78 @@
 import { describe, expect, it } from 'vitest';
 import { faker } from '../src';
 
-faker.seed(1234);
+const seededRuns = [
+  {
+    seed: 42,
+    expectations: {
+      recent: {
+        noArgs: 'number',
+      },
+    },
+  },
+  {
+    seed: 1337,
+    expectations: {
+      recent: {
+        noArgs: 'number',
+      },
+    },
+  },
+  {
+    seed: 1211,
+    expectations: {
+      recent: {
+        noArgs: 'number',
+      },
+    },
+  },
+];
+
+const NON_SEEDED_BASED_RUN = 5;
+
+const functionNames = ['recent'];
 
 describe('time', () => {
-  describe('recent()', () => {
-    it('returns the recent timestamp in Unix time format', () => {
-      const date = faker.time.recent();
-      expect(typeof date).toBe('number');
-    });
+  // TODO @Shinigami92 2022-02-04: Results are not seeded yet
+  for (const { seed, expectations } of seededRuns) {
+    describe(`seed: ${seed}`, () => {
+      for (const functionName of functionNames) {
+        it(`${functionName}()`, () => {
+          faker.seed(seed);
 
-    it('returns the recent timestamp in full time string format', () => {
-      const date = faker.time.recent('wide');
-      expect(typeof date).toBe('string');
+          const actual = faker.time[functionName]();
+          expect(typeof actual).toEqual(expectations[functionName].noArgs);
+        });
+      }
     });
+  }
 
-    it('returns the recent timestamp in abbreviated string format', () => {
-      const date = faker.time.recent('abbr');
-      expect(typeof date).toBe('string');
-    });
+  // 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('recent()', () => {
+        it('should return the recent timestamp in unix time format by default', () => {
+          const date = faker.time.recent();
+          expect(typeof date).toBe('number');
+        });
+
+        it('should return the recent timestamp in full time string format', () => {
+          const date = faker.time.recent('wide');
+          expect(typeof date).toBe('string');
+        });
+
+        it('should return the recent timestamp in abbreviated string format', () => {
+          const date = faker.time.recent('abbr');
+          expect(typeof date).toBe('string');
+        });
+
+        it('should return the recent timestamp in unix time format', () => {
+          const date = faker.time.recent('unix');
+          expect(typeof date).toBe('number');
+        });
+      });
+    }
   });
 });