handle split comparison results in parse_xml_report.py

from collections import Counter

SPLIT_STRING = "_split"

WHOLE_STRING = "_whole"

class TestcaseParser(dict):

    def __init__(self, testcases: list):

        super().__init__()

        properties = {

            p.get("name"): p.get("value") for p in testcase.findall(".//property")

        }

        ### handle split comparison results

        split_props = {k: v for k, v in properties.items() if SPLIT_STRING in k}

        whole_props = {k: v for k, v in properties.items() if WHOLE_STRING in k}

        if len(split_props) > 0 and len(whole_props) > 0:

            measures_from_split = set(

                [m.split(SPLIT_STRING)[0] for m in split_props.keys()]

            )

            measures_from_whole = set(

                [m.split(WHOLE_STRING)[0] for m in whole_props.keys()]

            )

            assert measures_from_split == measures_from_whole

            measures = measures_from_whole

            # collect existing split suffixes by evaluating one of the measures only

            m_tmp = measures.pop()

            splits = sorted(

                [

                    k.split(SPLIT_STRING)[-1]

                    for k in split_props.keys()

                    if k.startswith(m_tmp)

                ]

            )

            # record each split under a separate key

            # the dict per key has the same fulltestname and an additional key "split"

            # this way, the resulting DataFrame in the end can be split by testnames

            for s in splits:

                split_key = f"{fulltestname} - {s}"

                ret_split = {"testcase": fulltestname, "split": s}

                for m in measures:

                    ret_split.update({m: split_props[m + SPLIT_STRING + f"{s}"]})

                self[split_key] = ret_split

        # it can be the case that there are no splits defined in the pytest suite, e.g. for the renderer

        # then, there are only "_whole" values recorded where we only need to remove the suffix

        # this if also handles the split case - if there are splits, there was also a "_whole" comparison done

        if len(whole_props) > 0:

            properties = {

                k.replace(WHOLE_STRING, ""): v for k, v in whole_props.items()

            }

            properties["split"] = "whole"

        ret.update(properties)

        self[fulltestname] = ret