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# -*- coding: utf-8 -*-
import os
from shutil import rmtree
import signal
from subprocess import run, call, PIPE, Popen
from sys import stderr
from tempfile import mkdtemp
from typing import List
class Alarm(Exception):
pass
class BasicTest:
def alarmHandler(self, signum, frame):
raise Alarm
def withTimeout(self, seconds, cmd, *args, **kwds):
# Windows doesn't have SIGALRM
try:
signal.signal(signal.SIGALRM, self.alarmHandler)
signal.alarm(seconds)
ret = cmd(*args, **kwds)
signal.alarm(0) # reset the alarm
except AttributeError:
ret = cmd(*args, **kwds)
return ret
def communicateFlush(self, string, process):
if string:
process.stdin.write(string.encode('utf-8'))
process.stdin.write(b'\0')
process.stdin.flush()
output = []
char = None
try:
char = self.withTimeout(10, process.stdout.read, 1)
except Alarm:
print("Timeout before reading a single character!", file=stderr)
while char and char != b'\0':
output.append(char)
try:
char = self.withTimeout(10, process.stdout.read, 1)
except Alarm:
print("Timeout before reading %s chars" % len(output),
file=stderr)
break # send what we got up till now
return b"".join(output).decode('utf-8').replace('\r\n', '\n')
def openPipe(self, procName, args):
return Popen([os.environ['LTTOOLBOX_PATH']+'/'+procName] + args,
stdin=PIPE, stdout=PIPE, stderr=PIPE)
def closePipe(self, proc, expectFail=False):
proc.communicate() # let it terminate
proc.stdin.close()
proc.stdout.close()
proc.stderr.close()
retCode = proc.poll()
if expectFail:
self.assertNotEqual(retCode, 0)
else:
self.assertEqual(retCode, 0)
def compileDix(self, dir, dix, flags=None, binName='compiled.bin',
expectFail=False):
return self.callProc('lt-comp',
[dir, dix, binName],
flags,
expectFail)
def callProc(self, name, bins, flags=None, expectFail=False):
cmd = [os.environ['LTTOOLBOX_PATH']+'/'+name] + (flags or []) + bins
res = run(cmd, capture_output=True)
if (res.returncode == 0) == expectFail:
print("\nFAILED CMD: " + " ".join(cmd))
print("\nSTDOUT:", res.stdout)
print("STDERR:", res.stderr)
if expectFail:
self.assertNotEqual(res.returncode, 0)
return False
else:
self.assertEqual(res.returncode, 0)
return True
class TempDir:
def __enter__(self):
self.tmpd = mkdtemp()
return self.tmpd
def __exit__(self, *args):
rmtree(self.tmpd)
class PrintTest(BasicTest):
"""See lt_print test for how to use this. Override runTest if you don't
want to use NUL flushing."""
printdix = "data/minimal-mono.dix"
printdir = "lr"
expectedOutput = ""
expectedRetCodeFail = False
printflags = []
def compileTest(self, tmpd):
return self.compileDix(self.printdir, self.printdix,
binName=tmpd+'/compiled.bin')
def runTest(self):
with TempDir() as tmpd:
self.compileTest(tmpd)
self.printresult = self.openPipe('lt-print',
self.printflags
+ [tmpd+'/compiled.bin'])
self.assertEqual(self.communicateFlush(None, self.printresult),
self.expectedOutput)
self.closePipe(self.printresult, self.expectedRetCodeFail)
class ProcTest(BasicTest):
"""See lt_proc test for how to use this. Override runTest if you don't
want to use NUL flushing."""
procdix = "data/minimal-mono.dix"
procdir = "lr"
compflags = [] # type: List[str]
procflags = ["-z"]
inputs = [""]
expectedOutputs = [""]
expectedRetCodeFail = False
expectedCompRetCodeFail = False
flushing = True
def compileTest(self, tmpd):
return self.compileDix(self.procdir, self.procdix,
flags=self.compflags,
binName=tmpd+'/compiled.bin',
expectFail=self.expectedCompRetCodeFail)
def runTest(self):
with TempDir() as tmpd:
if not self.compileTest(tmpd):
return
if self.flushing:
self.runTestFlush(tmpd)
else:
self.runTestNoFlush(tmpd)
def openProc(self, tmpd):
return self.openPipe('lt-proc', self.procflags+[tmpd+'/compiled.bin'])
def runTestFlush(self, tmpd):
proc = self.openProc(tmpd)
self.assertEqual(len(self.inputs),
len(self.expectedOutputs))
for inp, exp in zip(self.inputs, self.expectedOutputs):
self.assertEqual(self.communicateFlush(inp+"[][\n]", proc),
exp+"[][\n]")
self.closePipe(proc, self.expectedRetCodeFail)
def runTestNoFlush(self, tmpd):
for inp, exp in zip(self.inputs, self.expectedOutputs):
proc = self.openProc(tmpd)
self.assertEqual(proc.communicate(input=inp.encode('utf-8'))[0],
exp.encode('utf-8'))
retCode = proc.poll()
if self.expectedRetCodeFail:
self.assertNotEqual(retCode, 0)
else:
self.assertEqual(retCode, 0)
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