# Copyright 2019 The TensorFlow Authors. All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
# ==============================================================================
"""Tests for error_utils module."""

import re
import unittest

from nvidia.dali._autograph.pyct import error_utils
from nvidia.dali._autograph.pyct import origin_info


class ErrorMetadataBaseTest(unittest.TestCase):

  def test_create_exception_default_constructor(self):

    class CustomError(Exception):
      pass

    em = error_utils.ErrorMetadataBase(
        callsite_tb=(),
        cause_metadata=None,
        cause_message='test message',
        source_map={},
        converter_filename=None)
    exc = em.create_exception(CustomError())
    self.assertIsInstance(exc, CustomError)
    self.assertIn('test message', str(exc))

  def test_create_exception_custom_constructor(self):

    class CustomError(Exception):

      def __init__(self):
        super(CustomError, self).__init__('test_message')

    em = error_utils.ErrorMetadataBase(
        callsite_tb=(),
        cause_metadata=None,
        cause_message='test message',
        source_map={},
        converter_filename=None)
    exc = em.create_exception(CustomError())
    self.assertIsNone(exc)

  def test_get_message_no_code(self):
    callsite_tb = [
        ('/path/one.py', 11, 'test_fn_1', None),
        ('/path/two.py', 171, 'test_fn_2', 'test code'),
    ]
    cause_message = 'Test message'
    em = error_utils.ErrorMetadataBase(
        callsite_tb=callsite_tb,
        cause_metadata=None,
        cause_message=cause_message,
        source_map={},
        converter_filename=None)
    self.assertRegex(
        em.get_message(),
        re.compile(('"/path/one.py", line 11, in test_fn_1.*'
                    '"/path/two.py", line 171, in test_fn_2.*'
                    'Test message'), re.DOTALL))

  def test_get_message_converted_code(self):
    callsite_tb = [
        ('/path/one.py', 11, 'test_fn_1', 'test code 1'),
        ('/path/two.py', 171, 'test_fn_2', 'test code 2'),
        ('/path/three.py', 171, 'test_fn_3', 'test code 3'),
    ]
    cause_message = 'Test message'
    loc = origin_info.LineLocation(filename='/path/other_two.py', lineno=13)
    origin_info_value = origin_info.OriginInfo(
        loc=loc,
        function_name='converted_fn',
        source_code_line='converted test code',
        comment=None)
    em = error_utils.ErrorMetadataBase(
        callsite_tb=callsite_tb,
        cause_metadata=None,
        cause_message=cause_message,
        source_map={
            origin_info.LineLocation(filename='/path/two.py', lineno=171): origin_info_value
        },
        converter_filename=None)
    result = em.get_message()
    self.assertRegex(
        result,
        re.compile((r'converted_fn  \*.*'
                    r'"/path/three.py", line 171, in test_fn_3.*'
                    r'Test message'), re.DOTALL))
    self.assertNotRegex(result, re.compile('test_fn_1'))

  def test_get_message_call_overload(self):

    callsite_tb = [
        ('/path/one.py', 11, 'test_fn_1', 'test code 1'),
        ('/path/two.py', 0, 'test_fn_2', 'test code 2'),
        ('/path/three.py', 171, 'test_fn_3', 'test code 3'),
    ]
    cause_message = 'Test message'
    em = error_utils.ErrorMetadataBase(
        callsite_tb=callsite_tb,
        cause_metadata=None,
        cause_message=cause_message,
        source_map={},
        converter_filename='/path/two.py')
    self.assertRegex(
        em.get_message(),
        re.compile((r'"/path/one.py", line 11, in test_fn_1.*'
                    r'"/path/three.py", line 171, in test_fn_3  \*\*.*'
                    r'Test message'), re.DOTALL))
