In Python data visualization, how do I write integration tests?

        import unittest
        import matplotlib.pyplot as plt

        class TestDataVisualization(unittest.TestCase):
            def test_plot_creation(self):
                # Create sample data
                data = [1, 2, 3, 4, 5]
                
                # Create a plot
                plt.figure()
                plt.plot(data)
                
                # Check if the plot was created
                self.assertIsNotNone(plt.gcf())
            
            def test_plot_title(self):
                # Create sample data
                data = [1, 2, 3, 4, 5]
                
                # Create a plot and set a title
                plt.figure()
                plt.plot(data)
                plt.title("Sample Plot")
                
                # Check if the title is set correctly
                self.assertEqual(plt.gca().get_title(), "Sample Plot")
        
        if __name__ == "__main__":
            unittest.main()