added test cases

app.py

@@ -14,5 +14,8 @@ def detect_hotspots(image):
         return Image.fromarray(im_array[..., ::-1])
 
 
-demo = gr.Interface(fn=detect_hotspots, inputs=gr.Image(type='pil'), outputs="image", title="YOLO Object Detection")
+demo = gr.Interface(fn=detect_hotspots, inputs=gr.Image(type='pil'), outputs="image", title="YOLO Object Detection",
+                    examples=[['Test Case 1', 'images/test_image_1.jpg'], ['Test Case 2', 'images/test_image_2.jpg'],
+                              ['Test Case 3', 'images/test_image_3.jpg'], ['Test Case 4', 'images/test_image_4.jpg']],
+             cache_examples= False,)
 demo.launch()