Add tests for dpctl.SyclPlatform.get_composite_devices

Author: ndgrigorian

dpctl/tests/test_sycl_device.py

@@ -337,4 +337,5 @@ def test_get_component_devices_from_composite():
     for Cd in composite_devices:
         component_devices = Cd.component_devices
         for d in component_devices:
+            # component devices are root devices
             assert d in devices

dpctl/tests/test_sycl_platform.py

@@ -259,3 +259,20 @@ def test_platform_get_devices_enum_device_type():
                 devices = p.get_devices(device_type=dty)
                 if len(devices):
                     assert (d.device_type == dty for d in devices)
+
+
+def test_platform_get_composite_devices():
+    platforms = dpctl.get_platforms()
+    if platforms:
+        for p in platforms:
+            composite_devices = p.get_composite_devices()
+            if not composite_devices:
+                pytest.skip("No composite devices available")
+            devices = p.get_devices()
+            for Cd in composite_devices:
+                assert Cd.has_aspect_is_composite
+                component_devices = Cd.component_devices
+                # all component devices are root devices
+                assert all(d in devices for d in component_devices)
+    else:
+        pytest.skip("No platforms available")