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#!/usr/bin/env python3
# Copyright 2022-2025 David Robillard <d@drobilla.net>
# SPDX-License-Identifier: ISC
"""Utilities for data-driven tests."""
# pylint: disable=consider-using-f-string
# pylint: disable=invalid-name
import argparse
import datetime
import difflib
import os
import re
import shlex
import subprocess
import sys
import urllib.parse
class Results:
"""Counts of test executions and failures."""
def __init__(self):
self.n_tests = 0
self.n_failures = 0
def test_passed(self):
"""Record a successful test."""
self.n_tests += 1
def test_failed(self):
"""Record a failed test."""
self.n_tests += 1
self.n_failures += 1
def check(self, condition, message=None):
"""Check a test condition and update counts accordingly."""
if not condition:
self.test_failed()
if message is not None:
error(message)
else:
self.test_passed()
def error(message):
"""Log an error message to stderr."""
sys.stderr.write("error: ")
sys.stderr.write(message)
sys.stderr.write("\n")
def wrapper_args(description, with_input=False):
"""Return the command line arguments for a wrapped test."""
parser = argparse.ArgumentParser(description)
parser.add_argument("--serdi", default="./serdi", help="serdi executable")
parser.add_argument("--wrapper", default="", help="executable wrapper")
if with_input:
parser.add_argument("input", help="input file")
return parser.parse_args(sys.argv[1:])
def command_output(wrapper, command, stdin=None):
"""Run a command and check that stdout matches the expected output."""
proc = subprocess.run(
shlex.split(wrapper) + command,
capture_output=True,
check=True,
encoding="utf-8",
input=stdin,
)
assert wrapper or not proc.stderr
return proc.stdout
def print_result_summary(results):
"""Print test result summary to stdout or stderr as appropriate."""
if results.n_tests <= 0:
error("No tests found")
return -1
failed, total = (results.n_failures, results.n_tests)
if failed == 0:
sys.stdout.write("All {} tests passed\n".format(total))
else:
error("{}/{} tests failed".format(failed, total))
return failed
def uri_path(uri):
"""Return the path component of a URI."""
path = urllib.parse.urlparse(uri).path
drive = os.path.splitdrive(path[1:])[0]
return path if not drive else path[1:]
def file_path(suite_dir, uri):
"""Return a relative path to a file in a test suite."""
return os.path.relpath(os.path.join(suite_dir, os.path.basename(uri)))
def syntax_from_path(path):
"""Return the serd syntax name corresponding to a file path."""
extensions = {
".ttl": "turtle",
".nt": "ntriples",
".trig": "trig",
".nq": "nquads",
}
return extensions[os.path.splitext(path)[1]]
def earl_assertion(test, passed, asserter):
"""Return a Turtle description of an assertion for the test report."""
asserter_str = ""
if asserter is not None:
asserter_str = "\n\tearl:assertedBy <%s> ;" % asserter
return """
[]
\ta earl:Assertion ;%s
\tearl:subject <http://drobilla.net/sw/serd> ;
\tearl:test <%s> ;
\tearl:result [
\t\ta earl:TestResult ;
\t\tearl:outcome %s ;
\t\tdc:date "%s"^^xsd:dateTime
\t] .
""" % (
asserter_str,
test,
"earl:passed" if passed else "earl:failed",
datetime.datetime.now().replace(microsecond=0).isoformat(),
)
def load_rdf(filename, base_uri, command_prefix):
"""Load an RDF file as dictionaries via serdi (only supports URIs)."""
rdf_type = "http://www.w3.org/1999/02/22-rdf-syntax-ns#type"
model = {}
instances = {}
cmd = command_prefix + [filename, base_uri]
proc = subprocess.run(
cmd,
encoding="utf-8",
stdout=subprocess.PIPE,
stderr=subprocess.PIPE,
check=True,
)
for line in proc.stdout.splitlines():
matches = re.match(r"<([^ ]*)> <([^ ]*)> <([^ ]*)> \.", line)
if matches:
s, p, o = (matches.group(1), matches.group(2), matches.group(3))
if s not in model:
model[s] = {p: [o]}
elif p not in model[s]:
model[s][p] = [o]
else:
model[s][p].append(o)
if p == rdf_type:
if o not in instances:
instances[o] = set([s])
else:
instances[o].update([s])
return model, instances
def lines_equal(from_lines, to_lines, from_filename, to_filename):
"""Return true if from_lines equals to_lines, or print a diff."""
same = True
for line in difflib.unified_diff(
from_lines,
to_lines,
fromfile=os.path.abspath(from_filename),
tofile=os.path.abspath(to_filename),
):
sys.stderr.write(line)
same = False
return same
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