test_gifft.py - mozsearch

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# This Source Code Form is subject to the terms of the Mozilla Public

# License, v. 2.0. If a copy of the MPL was not distributed with this

# file, You can obtain one at http://mozilla.org/MPL/2.0/.

import io

import sys

from os import path

from pathlib import Path

import mozunit

from expect_helper import expect

# Shenanigans to import the FOG glean_parser runner

FOG_ROOT_PATH = path.abspath(

    path.join(path.dirname(__file__), path.pardir, path.pardir)

sys.path.append(path.join(FOG_ROOT_PATH, "build_scripts", "glean_parser_ext"))

import run_glean_parser

def test_gifft_codegen():

"""

    A regression test. Very fragile.

    It generates C++ for GIFFT for metrics_test.yaml and compares it

    byte-for-byte with expected output C++ files.

    To generate new expected output files, set `UPDATE_EXPECT=1` when running the test suite:

    UPDATE_EXPECT=1 mach test toolkit/components/glean/pytest

"""

    options = {"allow_reserved": False}

    here_path = Path(path.dirname(__file__))

    input_files = [here_path / "metrics_test.yaml"]

    all_objs, options = run_glean_parser.parse_with_options(input_files, options)

    for probe_type in ("Event", "Histogram", "Scalar"):

        output_fd = io.StringIO()

        cpp_fd = io.StringIO()

        run_glean_parser.output_gifft_map(output_fd, probe_type, all_objs, cpp_fd)

        expect(here_path / f"gifft_output_{probe_type}", output_fd.getvalue())

if __name__ == "__main__":

    mozunit.main()