text: from unittest import TestCase
  
  from musurgia.timing import Clock, Timing
  
  
  class Test(TestCase):
      def test_1(self):
          seconds = 180
          self.assertEqual(Timing.get_clock(seconds), '''0:3':00"''')
  
      def test_2(self):
          t = Timing(quarter_duration=1, duration=0.65)
          result = 92.3076923076923
          self.assertEqual(result, t.tempo)
  
      def test_3(self):
          clock = Clock()
          clock.duration = 37
          result = (0, 0, 37)
          self.assertEqual(result, clock.clock)
  
      def test_4(self):
          clock1 = Clock(clock=(0, 2, 31))
          clock2 = Clock(clock=(0, 3, 11))
          clock3 = clock2.subtract(clock1)
          result = (0, 0, 40)
          self.assertEqual(result, clock3.clock)
  