def test_stencil_depth_args():
'''Check that invalid index values for the depth method in an instance
of the GOStencil class cause an exception to be raised.
'''
stencil = GOStencil()
stencil_string = "go_stencil(010,111,010)"
parsed_stencil = expr.FORT_EXPRESSION.parseString(stencil_string)[0]
stencil.load(parsed_stencil, "kernel_stencil")
for i, j in [(-2, 0), (2, 0), (0, -2), (0, 2)]:
with pytest.raises(GenerationError) as excinfo:
stencil.depth(i, j)
assert "must be between -1 and 1 but found ({0},{1})".format(i, j) \
in str(excinfo.value)
def test_stencil_case_1():
'''test that the metadata name 'go_stencil' can be provided in lower, or
upper case.
'''
stencil = GOStencil()
stencil_string = "go_StEnCiL(234,915,876)"
parsed_stencil = expr.FORT_EXPRESSION.parseString(stencil_string)[0]
stencil.load(parsed_stencil, "kernel_stencil")
assert stencil.has_stencil
expected = [8, 7, 6, 9, 1, 5, 2, 3, 4]
exp_index = 0
for idx2 in range(-1, 2):
for idx1 in range(-1, 2):
assert stencil.depth(idx1, idx2) == expected[exp_index]
exp_index += 1
def test_stencil_case_1():
'''test that the metadata name 'go_stencil' can be provided in lower, or
upper case.
'''
stencil = GOStencil()
stencil_string = "go_StEnCiL(000,011,000)"
parsed_stencil = expr.FORT_EXPRESSION.parseString(stencil_string)[0]
stencil.load(parsed_stencil, "kernel_stencil")
assert stencil.has_stencil
for idx2 in range(-1, 2):
for idx1 in range(-1, 2):
if idx1 in [0, 1] and idx2 == 0:
expected_depth = 1
else:
expected_depth = 0
assert stencil.depth(idx1, idx2) == expected_depth
def test_not_initialised():
'''A GOStencil object can be created in isolation and then have its
stencil information initialised using the load() method. If a
GOStencil object's stencil information has not been initialised
then asking for stencil information using the has_stencil, name
and depth methods should return an exception. This test checks
that an exception is raised as expected.
'''
stencil = GOStencil()
with pytest.raises(GenerationError) as excinfo:
_ = stencil.has_stencil
assert "ensure the load() method is called" in str(excinfo.value)
with pytest.raises(GenerationError) as excinfo:
_ = stencil.name
assert "ensure the load() method is called" in str(excinfo.value)
with pytest.raises(GenerationError) as excinfo:
_ = stencil.depth(0, 0)
assert "ensure the load() method is called" in str(excinfo.value)
