TST: Add a test for device property in array_api namespace (numpy#20271)

Author: aktech

numpy/array_api/tests/test_array_object.py

@@ -285,3 +285,14 @@ def test_python_scalar_construtors():
 
     assert_raises(TypeError, lambda: operator.index(b))
     assert_raises(TypeError, lambda: operator.index(f))
+
+
+def test_device_property():
+    a = ones((3, 4))
+    assert a.device == 'cpu'
+
+    assert np.array_equal(a.to_device('cpu'), a)
+    assert_raises(ValueError, lambda: a.to_device('gpu'))
+
+    assert np.array_equal(asarray(a, device='cpu'), a)
+    assert_raises(ValueError, lambda: asarray(a, device='gpu'))