Add submodule import tests (#18)

Signed-off-by: Glenn Jocher <glenn.jocher@ultralytics.com>

Author: glenn-jocher

tests/test_autoimport.py

@@ -10,32 +10,30 @@ class TestLazyImports(unittest.TestCase):
     def test_simple_imports(self):
         """Test basic import statements."""
         with lazy():
-            import json
-        self.assertIsInstance(json, LazyLoader)
-
+            import numpy as np
+        random_number = np.random.rand()
+        self.assertIsInstance(np, LazyLoader)
+        self.assertLess(random_number, 1.0)
+        
     def test_attribute_access(self):
         """Test accessing attributes triggers actual import."""
         with lazy():
             import json
-        t0 = time.perf_counter()
         result = json.dumps({"test": 123})
         self.assertIsInstance(result, str)
-        self.assertLess(time.perf_counter() - t0, 1.0)
 
-    def test_nested_imports(self):
+    def test_submodule_imports(self):
         """Test nested module imports and functionality."""
         with lazy():
-            import numpy as np
-        random_number = np.random.rand()
+            import numpy.random
+        random_number = numpy.random.rand()
         self.assertLess(random_number, 1.0)
 
     def test_direct_lazyloader(self):
         """Test direct LazyLoader instantiation."""
         base64_lazy = LazyLoader("base64")
-        t0 = time.perf_counter()
         result = base64_lazy.b64encode(b'test')
         self.assertEqual(result, b'dGVzdA==')
-        self.assertLess(time.perf_counter() - t0, 1.0)
 
 if __name__ == '__main__':
     unittest.main(verbosity=2)