test: add a test

Thanks to @jordydhoker for contributing this test: sodiray/radash#343

src/tests/array.test.ts

@@ -388,6 +388,26 @@ describe('array module', () => {
       expect(c.id).toBe('c')
       expect(c.word).toBe('yolo')
     })
+    test('correctly handles non string, number or symbol values', () => {
+      const list: any[] = [
+        null,
+        null,
+        true,
+        true,
+        'true',
+        false,
+        { id: 'a', word: 'hello' },
+        { id: 'a', word: 'hello' }
+      ]
+      const result = _.unique(list, val => (val && val.id) ?? val)
+      assert.deepEqual(result, [
+        null,
+        true,
+        'true',
+        false,
+        { id: 'a', word: 'hello' }
+      ])
+    })
   })
 
   describe('range function', () => {