Function test_dask_layers

dask/array/tests/test_array_core.py:5788–5796

()

def test_dask_layers():
    a = da.ones(1)
    assert a.dask.layers.keys() == {a.name}
    assert a.dask.dependencies == {a.name: set()}
    assert a.__dask_layers__() == (a.name,)
    b = a + 1
    assert b.dask.layers.keys() == {a.name, b.name}
    assert b.dask.dependencies == {a.name: set(), b.name: {a.name}}
    assert b.__dask_layers__() == (b.name,)


def test_len_object_with_unknown_size():