luau/tools/test_dcr.py

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# This file is part of the Luau programming language and is licensed under MIT License; see LICENSE.txt for details
import argparse
import os.path
import subprocess as sp
import sys
import xml.sax as x
SCRIPT_PATH = os.path.split(sys.argv[0])[0]
FAIL_LIST_PATH = os.path.join(SCRIPT_PATH, "faillist.txt")
def loadFailList():
with open(FAIL_LIST_PATH) as f:
return set(map(str.strip, f.readlines()))
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def safeParseInt(i, default=0):
try:
return int(i)
except ValueError:
return default
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class Handler(x.ContentHandler):
def __init__(self, failList):
self.currentTest = []
self.failList = failList # Set of dotted test names that are expected to fail
self.results = {} # {DottedName: TrueIfTheTestPassed}
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self.numSkippedTests = 0
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def startElement(self, name, attrs):
if name == "TestSuite":
self.currentTest.append(attrs["name"])
elif name == "TestCase":
self.currentTest.append(attrs["name"])
elif name == "OverallResultsAsserts":
if self.currentTest:
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passed = 0 == safeParseInt(attrs["failures"])
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dottedName = ".".join(self.currentTest)
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# Sometimes we get multiple XML trees for the same test. All of
# them must report a pass in order for us to consider the test
# to have passed.
r = self.results.get(dottedName, True)
self.results[dottedName] = r and passed
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elif name == "OverallResultsTestCases":
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self.numSkippedTests = safeParseInt(attrs.get("skipped", 0))
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def endElement(self, name):
if name == "TestCase":
self.currentTest.pop()
elif name == "TestSuite":
self.currentTest.pop()
def main():
parser = argparse.ArgumentParser(
description="Run Luau.UnitTest with deferred constraint resolution enabled"
)
parser.add_argument(
"path", action="store", help="Path to the Luau.UnitTest executable"
)
parser.add_argument(
"--dump",
dest="dump",
action="store_true",
help="Instead of doing any processing, dump the raw output of the test run. Useful for debugging this tool.",
)
parser.add_argument(
"--write",
dest="write",
action="store_true",
help="Write a new faillist.txt after running tests.",
)
args = parser.parse_args()
failList = loadFailList()
p = sp.Popen(
[
args.path,
"--reporters=xml",
"--fflags=true,DebugLuauDeferredConstraintResolution=true",
],
stdout=sp.PIPE,
)
handler = Handler(failList)
if args.dump:
for line in p.stdout:
sys.stdout.buffer.write(line)
return
else:
x.parse(p.stdout, handler)
p.wait()
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for testName, passed in handler.results.items():
if passed and testName in failList:
print("UNEXPECTED: {} should have failed".format(testName))
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elif not passed and testName not in failList:
print("UNEXPECTED: {} should have passed".format(testName))
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if args.write:
newFailList = sorted(
(
dottedName
for dottedName, passed in handler.results.items()
if not passed
),
key=str.lower,
)
with open(FAIL_LIST_PATH, "w", newline="\n") as f:
for name in newFailList:
print(name, file=f)
print("Updated faillist.txt")
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if handler.numSkippedTests > 0:
print(
"{} test(s) were skipped! That probably means that a test segfaulted!".format(
handler.numSkippedTests
),
file=sys.stderr,
)
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sys.exit(1)
ok = all(
not passed == (dottedName in failList)
for dottedName, passed in handler.results.items()
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)
if ok:
print("Everything in order!", file=sys.stderr)
sys.exit(0 if ok else 1)
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if __name__ == "__main__":
main()