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import unittest
import io
import os
import sys
from commontest import iter_equal, abs_output_dir, Myrm
from rdiff_backup import rpath, Globals
from rdiff_backup.iterfile import IterWrappingFile, FileWrappingIter, \
FileToMiscIter, MiscIterToFile, MiscIterFlush, MiscIterFlushRepeat
class FileException:
"""Like a file, but raise exception after certain # bytes read"""
def __init__(self, max):
self.count = 0
self.max = max
def read(self, chars):
self.count += chars
if self.count > self.max:
raise OSError(13, "Permission Denied")
return b"a" * chars
def close(self):
return None
class testIterFile(unittest.TestCase):
def setUp(self):
self.iter1maker = lambda: iter(list(range(50)))
self.iter2maker = lambda: iter(map(str, list(range(50))))
def testConversion(self):
"""Test iter to file conversion"""
for itm in [self.iter1maker, self.iter2maker]:
self.assertTrue(
iter_equal(itm(), IterWrappingFile(FileWrappingIter(itm()))))
def testFile(self):
"""Test sending files through iters"""
buf1 = b"hello" * 10000
file1 = io.BytesIO(buf1)
buf2 = b"goodbye" * 10000
file2 = io.BytesIO(buf2)
file_iter = FileWrappingIter(iter([file1, file2]))
new_iter = IterWrappingFile(file_iter)
self.assertEqual(next(new_iter).read(), buf1)
self.assertEqual(next(new_iter).read(), buf2)
self.assertRaises(StopIteration, new_iter.__next__)
def testFileException(self):
"""Test encoding a file which raises an exception"""
f = FileException(200 * 1024) # size depends on buffer size
new_iter = IterWrappingFile(FileWrappingIter(iter([f, b"foo"])))
f_out = next(new_iter)
self.assertEqual(f_out.read(50000), b"a" * 50000)
with self.assertRaises(OSError):
buf = f_out.read(190 * 1024) # noqa: F841
self.assertEqual(next(new_iter), b"foo")
self.assertRaises(StopIteration, new_iter.__next__)
class testMiscIters(unittest.TestCase):
"""Test sending rorpiter back and forth"""
def setUp(self):
"""Make testfiles/output directory and a few files"""
Myrm(abs_output_dir)
self.outputrp = rpath.RPath(Globals.local_connection, abs_output_dir)
self.regfile1 = self.outputrp.append("reg1")
self.regfile2 = self.outputrp.append("reg2")
self.regfile3 = self.outputrp.append("reg3")
self.outputrp.mkdir()
with self.regfile1.open("wb") as fp:
fp.write(b"hello")
self.regfile1.setfile(self.regfile1.open("rb"))
self.regfile2.touch()
self.regfile2.setfile(self.regfile2.open("rb"))
with self.regfile3.open("wb") as fp:
fp.write(b"goodbye")
self.regfile3.setfile(self.regfile3.open("rb"))
self.regfile1.setdata()
self.regfile2.setdata()
self.regfile3.setdata()
def print_MiscIterFile(self, rpiter_file):
"""Print the given rorpiter file"""
while 1:
buf = rpiter_file.read()
sys.stdout.write(buf)
if buf[0] == b"z":
break
def testBasic(self):
"""Test basic conversion"""
rplist = [self.outputrp, self.regfile1, self.regfile2, self.regfile3]
i_out = FileToMiscIter(MiscIterToFile(iter(rplist)))
out1 = next(i_out)
self.assertEqual(out1, self.outputrp)
out2 = next(i_out)
self.assertEqual(out2, self.regfile1)
fp = out2.open("rb")
self.assertEqual(fp.read(), b"hello")
self.assertFalse(fp.close())
out3 = next(i_out)
self.assertEqual(out3, self.regfile2)
fp = out3.open("rb")
self.assertEqual(fp.read(), b"")
self.assertFalse(fp.close())
next(i_out)
self.assertRaises(StopIteration, i_out.__next__)
@unittest.skipIf(os.name == "nt", "FIXME fails under Windows")
def testMix(self):
"""Test a mix of RPs and ordinary objects"""
filelist = [5, self.regfile3, "hello"]
s = MiscIterToFile(iter(filelist)).read()
i_out = FileToMiscIter(io.BytesIO(s))
out1 = next(i_out)
self.assertEqual(out1, 5)
out2 = next(i_out)
self.assertEqual(out2, self.regfile3)
fp = out2.open("rb")
self.assertEqual(fp.read(), b"goodbye")
self.assertFalse(fp.close())
out3 = next(i_out)
self.assertEqual(out3, "hello")
self.assertRaises(StopIteration, i_out.__next__)
def testFlush(self):
"""Test flushing property of MiscIterToFile"""
rplist = [self.outputrp, MiscIterFlush, self.outputrp]
filelike = MiscIterToFile(iter(rplist))
new_filelike = io.BytesIO(
(filelike.read() + b"z" + filelike._i2b(0, 7)))
i_out = FileToMiscIter(new_filelike)
self.assertEqual(next(i_out), self.outputrp)
self.assertRaises(StopIteration, i_out.__next__)
i_out2 = FileToMiscIter(filelike)
self.assertEqual(next(i_out2), self.outputrp)
self.assertRaises(StopIteration, i_out2.__next__)
@unittest.skipIf(os.name == "nt", "FIXME fails under Windows")
def testFlushRepeat(self):
"""Test flushing like above, but have Flush obj emerge from iter"""
rplist = [self.outputrp, MiscIterFlushRepeat, self.outputrp]
filelike = MiscIterToFile(iter(rplist))
new_filelike = io.BytesIO(
(filelike.read() + b"z" + filelike._i2b(0, 7)))
i_out = FileToMiscIter(new_filelike)
self.assertEqual(next(i_out), self.outputrp)
self.assertIs(next(i_out), MiscIterFlushRepeat)
self.assertRaises(StopIteration, i_out.__next__)
i_out2 = FileToMiscIter(filelike)
self.assertEqual(next(i_out2), self.outputrp)
self.assertRaises(StopIteration, i_out2.__next__)
if __name__ == "__main__":
unittest.main()
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