Support testing of USMArray (#894)

* Add patching of 2 numpy asserts
* Add assert_equal to assert usm_ndarray
* Add converting tuple(usm_ndarray) to tuple(ndarray) for testing

Author: densmirn

dpnp/dpnp_utils/dpnp_algo_utils.pyx

@@ -55,6 +55,7 @@ __all__ = [
     "checker_throw_type_error",
     "checker_throw_value_error",
     "create_output_descriptor_py",
+    "convert_item",
     "dpnp_descriptor",
     "get_axis_indeces",
     "get_axis_offsets",

tests/__init__.py

@@ -0,0 +1,9 @@
+import dpnp
+import numpy
+
+from tests import testing
+
+
+numpy.testing.assert_allclose = testing.assert_allclose
+numpy.testing.assert_array_equal = testing.assert_array_equal
+numpy.testing.assert_equal = testing.assert_equal

tests/testing/__init__.py

@@ -0,0 +1,3 @@
+from tests.testing.array import assert_allclose
+from tests.testing.array import assert_array_equal
+from tests.testing.array import assert_equal

tests/testing/array.py

@@ -0,0 +1,52 @@
+# -*- coding: utf-8 -*-
+# *****************************************************************************
+# Copyright (c) 2016-2020, Intel Corporation
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are met:
+# - Redistributions of source code must retain the above copyright notice,
+#   this list of conditions and the following disclaimer.
+# - Redistributions in binary form must reproduce the above copyright notice,
+#   this list of conditions and the following disclaimer in the documentation
+#   and/or other materials provided with the distribution.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+# THE POSSIBILITY OF SUCH DAMAGE.
+# *****************************************************************************
+
+import numpy
+from dpnp.dpnp_utils import convert_item
+
+
+assert_allclose_orig = numpy.testing.assert_allclose
+assert_array_equal_orig = numpy.testing.assert_array_equal
+assert_equal_orig = numpy.testing.assert_equal
+
+
+def _assert(assert_func, result, expected, *args, **kwargs):
+    result = convert_item(result)
+    expected = convert_item(expected)
+
+    assert_func(result, expected, *args, **kwargs)
+
+
+def assert_allclose(result, expected, *args, **kwargs):
+    _assert(assert_allclose_orig, result, expected, *args, **kwargs)
+
+
+def assert_array_equal(result, expected, *args, **kwargs):
+    _assert(assert_array_equal_orig, result, expected, *args, **kwargs)
+
+
+def assert_equal(result, expected, *args, **kwargs):
+    _assert(assert_equal_orig, result, expected, *args, **kwargs)