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import unittest, StringIO
from commontest import *
from rdiff_backup.iterfile import *
from rdiff_backup import lazy
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, l):
self.count += l
if self.count > self.max: raise IOError(13, "Permission Denied")
return "a"*l
def close(self): return None
class testIterFile(unittest.TestCase):
def setUp(self):
self.iter1maker = lambda: iter(range(50))
self.iter2maker = lambda: iter(map(str, range(50)))
def testConversion(self):
"""Test iter to file conversion"""
for itm in [self.iter1maker, self.iter2maker]:
assert lazy.Iter.equal(itm(),
IterWrappingFile(FileWrappingIter(itm())))
def testFile(self):
"""Test sending files through iters"""
buf1 = "hello"*10000
file1 = StringIO.StringIO(buf1)
buf2 = "goodbye"*10000
file2 = StringIO.StringIO(buf2)
file_iter = FileWrappingIter(iter([file1, file2]))
new_iter = IterWrappingFile(file_iter)
assert new_iter.next().read() == buf1
assert new_iter.next().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, "foo"])))
f_out = new_iter.next()
assert f_out.read(50000) == "a"*50000
try: buf = f_out.read(190*1024)
except IOError: pass
else: assert 0, len(buf)
assert new_iter.next() == "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("testfiles/output")
self.outputrp = rpath.RPath(Globals.local_connection,
"testfiles/output")
self.regfile1 = self.outputrp.append("reg1")
self.regfile2 = self.outputrp.append("reg2")
self.regfile3 = self.outputrp.append("reg3")
self.outputrp.mkdir()
fp = self.regfile1.open("wb")
fp.write("hello")
fp.close()
self.regfile1.setfile(self.regfile1.open("rb"))
self.regfile2.touch()
self.regfile2.setfile(self.regfile2.open("rb"))
fp = self.regfile3.open("wb")
fp.write("goodbye")
fp.close()
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] == "z": break
def testBasic(self):
"""Test basic conversion"""
l = [self.outputrp, self.regfile1, self.regfile2, self.regfile3]
i_out = FileToMiscIter(MiscIterToFile(iter(l)))
out1 = i_out.next()
assert out1 == self.outputrp
out2 = i_out.next()
assert out2 == self.regfile1
fp = out2.open("rb")
assert fp.read() == "hello"
assert not fp.close()
out3 = i_out.next()
assert out3 == self.regfile2
fp = out3.open("rb")
assert fp.read() == ""
assert not fp.close()
i_out.next()
self.assertRaises(StopIteration, i_out.next)
def testMix(self):
"""Test a mix of RPs and ordinary objects"""
l = [5, self.regfile3, "hello"]
s = MiscIterToFile(iter(l)).read()
i_out = FileToMiscIter(StringIO.StringIO(s))
out1 = i_out.next()
assert out1 == 5, out1
out2 = i_out.next()
assert out2 == self.regfile3
fp = out2.open("rb")
assert fp.read() == "goodbye"
assert not fp.close()
out3 = i_out.next()
assert out3 == "hello", out3
self.assertRaises(StopIteration, i_out.next)
def testFlush(self):
"""Test flushing property of MiscIterToFile"""
l = [self.outputrp, MiscIterFlush, self.outputrp]
filelike = MiscIterToFile(iter(l))
new_filelike = StringIO.StringIO((filelike.read() + "z" +
C.long2str(0L)))
i_out = FileToMiscIter(new_filelike)
assert i_out.next() == self.outputrp
self.assertRaises(StopIteration, i_out.next)
i_out2 = FileToMiscIter(filelike)
assert i_out2.next() == self.outputrp
self.assertRaises(StopIteration, i_out2.next)
def testFlushRepeat(self):
"""Test flushing like above, but have Flush obj emerge from iter"""
l = [self.outputrp, MiscIterFlushRepeat, self.outputrp]
filelike = MiscIterToFile(iter(l))
new_filelike = StringIO.StringIO((filelike.read() + "z" +
C.long2str(0L)))
i_out = FileToMiscIter(new_filelike)
assert i_out.next() == self.outputrp
assert i_out.next() is MiscIterFlushRepeat
self.assertRaises(StopIteration, i_out.next)
i_out2 = FileToMiscIter(filelike)
assert i_out2.next() == self.outputrp
self.assertRaises(StopIteration, i_out2.next)
if __name__ == "__main__": unittest.main()
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