Added new test file to test indexing

Author: oleksandr-pavlyk

dpctl/tests/test_usm_ndarray_indexing.py

@@ -0,0 +1,60 @@
+#                      Data Parallel Control (dpctl)
+#
+# Copyright 2020-2022 Intel Corporation
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+
+# import numpy as np
+# import pytest
+from helper import get_queue_or_skip
+
+# import dpctl
+import dpctl.tensor as dpt
+
+# from helper import skip_if_dtype_not_supported
+
+
+def test_basic_slice1():
+    q = get_queue_or_skip()
+    x = dpt.empty(10, dtype="u2", sycl_queue=q)
+    y = x[0]
+    assert isinstance(y, dpt.usm_ndarray)
+    assert y.ndim == 0
+    assert y.shape == tuple()
+    assert y.strides == tuple()
+
+
+def test_basic_slice2():
+    q = get_queue_or_skip()
+    x = dpt.empty(10, dtype="i2", sycl_queue=q)
+    y = x[(0,)]
+    assert isinstance(y, dpt.usm_ndarray)
+    assert y.ndim == 0
+    assert y.shape == tuple()
+    assert y.strides == tuple()
+
+
+def test_basic_slice3():
+    q = get_queue_or_skip()
+    x = dpt.empty(10, dtype="i2", sycl_queue=q)
+    y = x[:]
+    assert isinstance(y, dpt.usm_ndarray)
+    assert y.ndim == x.ndim
+    assert y.shape == x.shape
+    assert y.strides == x.strides
+    y = x[(slice(None, None, None),)]
+    assert isinstance(y, dpt.usm_ndarray)
+    assert y.ndim == x.ndim
+    assert y.shape == x.shape
+    assert y.strides == x.strides