def test_multimaths(create_files_in_directory_plus_output_type):
files, testdir, out_ext = create_files_in_directory_plus_output_type
# Get the command
maths = fsl.MultiImageMaths(in_file="a.nii", out_file="c.nii")
# Test the underlying command
assert maths.cmd == "fslmaths"
# Test that it fails without an operation an
with pytest.raises(ValueError):
maths.run()
# Test a few operations
maths.inputs.operand_files = ["a.nii", "b.nii"]
opstrings = [
"-add %s -div %s", "-max 1 -sub %s -min %s", "-mas %s -add %s"
]
for ostr in opstrings:
maths.inputs.op_string = ostr
assert maths.cmdline == "fslmaths a.nii %s c.nii" % ostr % ("a.nii",
"b.nii")
# Test that we don't need to ask for an out file
maths = fsl.MultiImageMaths(in_file="a.nii",
op_string="-add %s -mul 5",
operand_files=["b.nii"])
assert maths.cmdline == "fslmaths a.nii -add b.nii -mul 5 %s" % os.path.join(
testdir, "a_maths%s" % out_ext)
def test_multimaths(fsl_output_type=None):
prev_type = set_output_type(fsl_output_type)
files, testdir, origdir, out_ext = create_files_in_directory()
# Get the command
maths = fsl.MultiImageMaths(in_file="a.nii", out_file="c.nii")
# Test the underlying command
yield assert_equal, maths.cmd, "fslmaths"
# Test that it fails without an operation an
yield assert_raises, ValueError, maths.run
# Test a few operations
maths.inputs.operand_files = ["a.nii", "b.nii"]
opstrings = ["-add %s -div %s",
"-max 1 -sub %s -min %s",
"-mas %s -add %s"]
for ostr in opstrings:
maths.inputs.op_string = ostr
yield assert_equal, maths.cmdline, "fslmaths a.nii %s c.nii" % ostr % ("a.nii", "b.nii")
# Test that we don't need to ask for an out file
maths = fsl.MultiImageMaths(in_file="a.nii", op_string="-add %s -mul 5", operand_files=["b.nii"])
yield assert_equal, maths.cmdline, \
"fslmaths a.nii -add b.nii -mul 5 %s" % os.path.join(testdir, "a_maths%s" % out_ext)
# Clean up our mess
clean_directory(testdir, origdir)
set_output_type(prev_type)