cumsum array method (#1030)

Author: Alexander-Makaryev

dpnp/dpnp_array.py

@@ -414,7 +414,19 @@ def conjugate(self):
  # 'copy',
  # 'ctypes',
  # 'cumprod',
- # 'cumsum',
+
+    def cumsum(self, axis=None, dtype=None, out=None):
+        """
+        Return the cumulative sum of the elements along the given axis.
+
+        See Also
+        --------
+        :obj:`dpnp.cumsum`
+
+        """
+
+        return dpnp.cumsum(self, axis=axis, dtype=dtype, out=out)
+
  # 'data',
 
     def diagonal(input, offset=0, axis1=0, axis2=1):

tests/skipped_tests_gpu.tbl

@@ -1091,9 +1091,6 @@ tests/third_party/cupy/math_tests/test_sumprod.py::TestCumprod::test_ndarray_cum
 tests/third_party/cupy/math_tests/test_sumprod.py::TestDiff::test_diff_1dim
 tests/third_party/cupy/math_tests/test_sumprod.py::TestDiff::test_diff_1dim_with_n
 tests/third_party/cupy/math_tests/test_sumprod.py::TestDiff::test_diff_2dim_without_axis
-tests/third_party/cupy/math_tests/test_sumprod.py::TestCumsum_param_0_{axis=0}::test_ndarray_cumsum_axis
-tests/third_party/cupy/math_tests/test_sumprod.py::TestCumsum_param_1_{axis=1}::test_ndarray_cumsum_axis
-tests/third_party/cupy/math_tests/test_sumprod.py::TestCumsum_param_2_{axis=2}::test_ndarray_cumsum_axis
 tests/third_party/cupy/math_tests/test_sumprod.py::TestCumprod::test_cumprod_arraylike
 tests/third_party/cupy/math_tests/test_sumprod.py::TestCumprod::test_cumprod_huge_array
 tests/third_party/cupy/math_tests/test_sumprod.py::TestCumprod::test_cumprod_numpy_array