import os

def get_name(name):
    if os.path.exists(name):
        return name
    rel = os.path.join("testdata", name)
    if os.path.exists(rel):
        return rel
    this = os.path.dirname(__file__)
    data = os.path.join(this, "..", "testdata")
    res = os.path.join(data, name)
    if os.path.exists(res):
        return res
    raise FileNotFoundError("Unable to find '{0}' or '{1}' or '{2}'".format(name, rel, res))