content: import unittest
  
  from pyecharts.faker import Faker, Collector
  
  
  class TestFaker(unittest.TestCase):
  
      def test_rand_color(self):
          rand_color = Faker.rand_color()
          assert rand_color is not None
  
      def test_img_path(self):
          self.assertEqual(Faker.img_path(path="/usr/local"), "/usr/local")
  
      def test_collector(self):
          def _add(x, y):
              return x + y
  
          c = Collector()
          c.funcs(_add)
          self.assertEqual(c.charts[0][1], "_add")
  