new_contents: from unittest import TestCase
  
  import phi
  
  
  class TestCIInstallation(TestCase):
  
      def test_detect_tf_torch_jax(self):
          backends = phi.detect_backends()
          names = [b.name for b in backends]
          self.assertIn('PyTorch', names)
          self.assertIn('Jax', names)
          self.assertIn('TensorFlow', names)
  
subject: Test that all backends detected on GitHub Actions