#!/usr/bin/env python

import sys, glob
sys.path.insert(0, './gen-py')
sys.path.insert(0, glob.glob('../../lib/py/build/lib.*')[0])

from ThriftTest import ThriftTest
from ThriftTest.ttypes import *
from thrift.transport import TTransport
from thrift.transport import TSocket
from thrift.protocol import TBinaryProtocol
import unittest
import time

class TestEof(unittest.TestCase):

  def setUp(self):
    trans = TTransport.TMemoryBuffer()
    prot = TBinaryProtocol.TBinaryProtocol(trans)

    x = Xtruct()
    x.string_thing = "Zero"
    x.byte_thing = 0

    x.write(prot)

    x = Xtruct()
    x.string_thing = "One"
    x.byte_thing = 1

    x.write(prot)

    self.data = trans.getvalue()

  def testTransportReadAll(self):
    """Test that readAll on any type of transport throws an EOFError"""
    trans = TTransport.TMemoryBuffer(self.data)
    trans.readAll(1)

    try:
      trans.readAll(10000)
    except EOFError:
      return

    self.fail("Should have gotten EOFError")

  def eofTestHelper(self, pfactory):
    trans = TTransport.TMemoryBuffer(self.data)
    prot = pfactory.getProtocol(trans)

    x = Xtruct()
    x.read(prot)
    self.assertEqual(x.string_thing, "Zero")
    self.assertEqual(x.byte_thing, 0)

    x = Xtruct()
    x.read(prot)
    self.assertEqual(x.string_thing, "One")
    self.assertEqual(x.byte_thing, 1)

    try:
      x = Xtruct()
      x.read(prot)
    except EOFError:
      return

    self.fail("Should have gotten EOFError")

  def eofTestHelperStress(self, pfactory):
    """Teest the ability of TBinaryProtocol to deal with the removal of every byte in the file"""
    # TODO: we should make sure this covers more of the code paths

    for i in xrange(0, len(self.data) + 1):
      trans = TTransport.TMemoryBuffer(self.data[0:i])
      prot = pfactory.getProtocol(trans)
      try:
        x = Xtruct()
        x.read(prot)
        x.read(prot)
        x.read(prot)
      except EOFError:
        continue
      self.fail("Should have gotten an EOFError")

  def testBinaryProtocolEof(self):
    """Test that TBinaryProtocol throws an EOFError when it reaches the end of the stream"""
    self.eofTestHelper(TBinaryProtocol.TBinaryProtocolFactory())
    self.eofTestHelperStress(TBinaryProtocol.TBinaryProtocolFactory())

  def testBinaryProtocolAcceleratedEof(self):
    """Test that TBinaryProtocolAccelerated throws an EOFError when it reaches the end of the stream"""
    self.eofTestHelper(TBinaryProtocol.TBinaryProtocolAcceleratedFactory())
    self.eofTestHelperStress(TBinaryProtocol.TBinaryProtocolAcceleratedFactory())

def suite():
  suite = unittest.TestSuite()
  loader = unittest.TestLoader()
  suite.addTest(loader.loadTestsFromTestCase(TestEof))
  return suite

if __name__ == "__main__":
  unittest.main(defaultTest="suite", testRunner=unittest.TextTestRunner(verbosity=2))