#!/usr/bin/python
#

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"""Script for testing ganeti.backend"""

import os
import sys
import unittest

from ganeti import errors

import testutils


class TestErrors(testutils.GanetiTestCase):
  def testGetErrorClass(self):
    tdata = {
      "": None,
      ".": None,
      "-": None,
      "ECODE_INVAL": None,
      "NoErrorClassName": None,
      "GenericError": errors.GenericError,
      "ProgrammerError": errors.ProgrammerError,
      }

    for name, cls in tdata.items():
      self.assert_(errors.GetErrorClass(name) is cls)

  def testEncodeException(self):
    self.assertEqualValues(errors.EncodeException(Exception("Foobar")),
                           ("Exception", ("Foobar", )))
    err = errors.GenericError(True, 100, "foo", ["x", "y"])
    self.assertEqualValues(errors.EncodeException(err),
                           ("GenericError", (True, 100, "foo", ["x", "y"])))

  def testMaybeRaise(self):
    testvals = [None, 1, 2, 3, "Hello World", (1, ), (1, 2, 3),
                ("NoErrorClassName", []), ("NoErrorClassName", None),
                ("GenericError", [1, 2, 3], None), ("GenericError", 1)]
    # These shouldn't raise
    for i in testvals:
      errors.MaybeRaise(i)

    self.assertRaises(errors.GenericError, errors.MaybeRaise,
                      ("GenericError", ["Hello"]))
    # Check error encoding
    for i in testvals:
      src = errors.GenericError(i)
      try:
        errors.MaybeRaise(errors.EncodeException(src))
      except errors.GenericError, dst:
        self.assertEqual(src.args, dst.args)
        self.assertEqual(src.__class__, dst.__class__)
      else:
        self.fail("Exception %s not raised" % repr(src))

  def testGetEncodedError(self):
    self.assertEqualValues(errors.GetEncodedError(["GenericError",
                                                   ("Hello", 123, "World")]),
                           (errors.GenericError, ("Hello", 123, "World")))
    self.assertEqualValues(errors.GetEncodedError(["GenericError", []]),
                           (errors.GenericError, ()))
    self.assertFalse(errors.GetEncodedError(["NoErrorClass",
                                             ("Hello", 123, "World")]))


if __name__ == "__main__":
  testutils.GanetiTestProgram()