# Copyright 2017, The Android Open Source Project
#
# 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.

"""Utility functions for unit tests."""

# pylint: disable=line-too-long

import os

import constants
import unittest_constants as uc

def assert_strict_equal(test_class, first, second):
    """Check for strict equality and strict equality of nametuple elements.

    assertEqual considers types equal to their subtypes, but we want to
    not consider set() and frozenset() equal for testing.
    """
    # Allow 2 lists with different order but the same content equal.
    if isinstance(first, list) and isinstance(second, list):
        first.sort()
        second.sort()
    test_class.assertEqual(first, second)
    # allow byte and unicode string equality.
    if not (isinstance(first, str) and
            isinstance(second, str)):
        test_class.assertIsInstance(first, type(second))
        test_class.assertIsInstance(second, type(first))
    # Recursively check elements of namedtuples for strict equals.
    if isinstance(first, tuple) and hasattr(first, '_fields'):
        # pylint: disable=invalid-name
        for f in first._fields:
            assert_strict_equal(test_class, getattr(first, f),
                                getattr(second, f))

def assert_equal_testinfos(test_class, test_info_a, test_info_b):
    """Check that the passed in TestInfos are equal."""
    # Use unittest.assertEqual to do checks when None is involved.
    if test_info_a is None or test_info_b is None:
        test_class.assertEqual(test_info_a, test_info_b)
        return

    for attr in test_info_a.__dict__:
        test_info_a_attr = getattr(test_info_a, attr)
        test_info_b_attr = getattr(test_info_b, attr)
        test_class.assertEqual(test_info_a_attr, test_info_b_attr,
                               msg=('TestInfo.%s mismatch: %s != %s' %
                                    (attr, test_info_a_attr, test_info_b_attr)))

def assert_equal_testinfo_sets(test_class, test_info_set_a, test_info_set_b):
    """Check that the sets of TestInfos are equal."""
    test_class.assertEqual(len(test_info_set_a), len(test_info_set_b),
                           msg=('mismatch # of TestInfos: %d != %d' %
                                (len(test_info_set_a), len(test_info_set_b))))
    # Iterate over a set and pop them out as you compare them.
    while test_info_set_a:
        test_info_a = test_info_set_a.pop()
        test_info_b_to_remove = None
        for test_info_b in test_info_set_b:
            try:
                assert_equal_testinfos(test_class, test_info_a, test_info_b)
                test_info_b_to_remove = test_info_b
                break
            except AssertionError:
                pass
        if test_info_b_to_remove:
            test_info_set_b.remove(test_info_b_to_remove)
        else:
            # We haven't found a match, raise an assertion error.
            raise AssertionError('No matching TestInfo (%s) in [%s]' %
                                 (test_info_a, ';'.join([str(t) for t in test_info_set_b])))


def isfile_side_effect(value):
    """Mock return values for os.path.isfile."""
    if value == '/%s/%s' % (uc.CC_MODULE_DIR, constants.MODULE_CONFIG):
        return True
    if value == '/%s/%s' % (uc.MODULE_DIR, constants.MODULE_CONFIG):
        return True
    if value.endswith('.cc'):
        return True
    if value.endswith('.cpp'):
        return True
    if value.endswith('.java'):
        return True
    if value.endswith('.kt'):
        return True
    if value.endswith(uc.INT_NAME + '.xml'):
        return True
    if value.endswith(uc.GTF_INT_NAME + '.xml'):
        return True
    return False


def realpath_side_effect(path):
    """Mock return values for os.path.realpath."""
    return os.path.join(uc.ROOT, path)