124 lines
3.4 KiB
Python
124 lines
3.4 KiB
Python
import sys
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import pytest
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import numpy as np
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from numpy.testing import assert_array_equal, IS_PYPY
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class TestDLPack:
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@pytest.mark.skipif(IS_PYPY, reason="PyPy can't get refcounts.")
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def test_dunder_dlpack_refcount(self):
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x = np.arange(5)
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y = x.__dlpack__()
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assert sys.getrefcount(x) == 3
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del y
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assert sys.getrefcount(x) == 2
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def test_dunder_dlpack_stream(self):
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x = np.arange(5)
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x.__dlpack__(stream=None)
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with pytest.raises(RuntimeError):
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x.__dlpack__(stream=1)
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def test_strides_not_multiple_of_itemsize(self):
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dt = np.dtype([('int', np.int32), ('char', np.int8)])
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y = np.zeros((5,), dtype=dt)
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z = y['int']
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with pytest.raises(RuntimeError):
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np.from_dlpack(z)
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@pytest.mark.skipif(IS_PYPY, reason="PyPy can't get refcounts.")
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def test_from_dlpack_refcount(self):
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x = np.arange(5)
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y = np.from_dlpack(x)
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assert sys.getrefcount(x) == 3
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del y
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assert sys.getrefcount(x) == 2
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@pytest.mark.parametrize("dtype", [
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np.int8, np.int16, np.int32, np.int64,
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np.uint8, np.uint16, np.uint32, np.uint64,
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np.float16, np.float32, np.float64,
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np.complex64, np.complex128
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])
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def test_dtype_passthrough(self, dtype):
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x = np.arange(5, dtype=dtype)
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y = np.from_dlpack(x)
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assert y.dtype == x.dtype
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assert_array_equal(x, y)
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def test_invalid_dtype(self):
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x = np.asarray(np.datetime64('2021-05-27'))
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with pytest.raises(TypeError):
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np.from_dlpack(x)
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def test_invalid_byte_swapping(self):
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dt = np.dtype('=i8').newbyteorder()
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x = np.arange(5, dtype=dt)
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with pytest.raises(TypeError):
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np.from_dlpack(x)
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def test_non_contiguous(self):
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x = np.arange(25).reshape((5, 5))
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y1 = x[0]
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assert_array_equal(y1, np.from_dlpack(y1))
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y2 = x[:, 0]
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assert_array_equal(y2, np.from_dlpack(y2))
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y3 = x[1, :]
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assert_array_equal(y3, np.from_dlpack(y3))
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y4 = x[1]
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assert_array_equal(y4, np.from_dlpack(y4))
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y5 = np.diagonal(x).copy()
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assert_array_equal(y5, np.from_dlpack(y5))
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@pytest.mark.parametrize("ndim", range(33))
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def test_higher_dims(self, ndim):
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shape = (1,) * ndim
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x = np.zeros(shape, dtype=np.float64)
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assert shape == np.from_dlpack(x).shape
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def test_dlpack_device(self):
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x = np.arange(5)
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assert x.__dlpack_device__() == (1, 0)
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y = np.from_dlpack(x)
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assert y.__dlpack_device__() == (1, 0)
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z = y[::2]
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assert z.__dlpack_device__() == (1, 0)
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def dlpack_deleter_exception(self):
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x = np.arange(5)
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_ = x.__dlpack__()
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raise RuntimeError
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def test_dlpack_destructor_exception(self):
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with pytest.raises(RuntimeError):
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self.dlpack_deleter_exception()
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def test_readonly(self):
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x = np.arange(5)
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x.flags.writeable = False
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with pytest.raises(TypeError):
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x.__dlpack__()
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def test_ndim0(self):
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x = np.array(1.0)
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y = np.from_dlpack(x)
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assert_array_equal(x, y)
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def test_size1dims_arrays(self):
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x = np.ndarray(dtype='f8', shape=(10, 5, 1), strides=(8, 80, 4),
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buffer=np.ones(1000, dtype=np.uint8), order='F')
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y = np.from_dlpack(x)
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assert_array_equal(x, y)
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