#!/usr/bin/env python3
# DESCRIPTION: Verilator: FSM coverage no-reset lowering test
#
# This program is free software; you can redistribute it and/or modify it
# under the terms of either the GNU Lesser General Public License Version 3
# or the Perl Artistic License Version 2.0.
# SPDX-FileCopyrightText: 2026 Wilson Snyder
# SPDX-License-Identifier: LGPL-3.0-only OR Artistic-2.0

import os

import vltest_bootstrap

test.scenarios('simulator')

# This test deliberately uses a clocked FSM with no outer reset branch. It
# keeps coverage extraction in the supported subset, but forces lowering down
# the "hasResetCond() == false" path so we validate the no-reset machinery
# rather than only reset-wrapped FSMs.
test.compile(verilator_flags2=['--cc --coverage-fsm'])

test.execute()

# Use annotated-source output so the expected file captures the no-reset shape
# directly, including the absence of reset pseudo-arcs.
test.run(cmd=[
    os.environ["VERILATOR_ROOT"] + "/bin/verilator_coverage",
    "--annotate",
    test.obj_dir + "/annotated",
    test.obj_dir + "/coverage.dat",
],
         verilator_run=True)

test.files_identical(test.obj_dir + "/annotated/" + test.name + ".v", test.golden_filename)

test.passes()