Transform a file an check the result

Transform an file and check whether it is identical to a reference.

transform_and_check(in_item, out_item, in_name = in_item,
  out_name = out_item, transformer, write_back, write_tree = FALSE,
  out_tree = "_tree", ...)

Arguments

in_item	An path to an file to transform.
out_item	The path to a file that contains the expected result.
in_name	The label of the in_item, defaults to in_item.
out_name	The label of the out_item, defaults to out_item.
transformer	A function to apply to the content of in_item.
write_back	Whether the results of the transformation should be written to the output file.
write_tree	Whether or not the tree structure of the test should be computed and written to a file.
out_tree	Name of tree file if written out.
...	Parameters passed to transformer function.