"""Unit tests for buildscripts.patch_builds.change_data.py."""

from __future__ import absolute_import

import os
import unittest

from mock import patch, MagicMock

import buildscripts.patch_builds.change_data as under_test

# pylint: disable=missing-docstring

NS = "buildscripts.patch_builds.change_data"


def ns(relative_name):  # pylint: disable=invalid-name
    """Return a full name from a name relative to the test module"s name space."""
    return NS + "." + relative_name


class TestFindChangedFilesInRepos(unittest.TestCase):
    @patch(ns("find_changed_files"))
    def test_nothing_found(self, changed_files_mock):
        repos_mock = [MagicMock()]
        changed_files_mock.return_value = set()

        self.assertEqual(0, len(under_test.find_changed_files_in_repos(repos_mock)))

    @patch(ns("find_changed_files"))
    def test_changed_files_in_multiple_repos(self, changed_files_mock):
        repos_mock = [MagicMock(), MagicMock()]
        first_repo_file_changes = [
            os.path.join("jstests", "test1.js"),
            os.path.join("jstests", "test1.cpp"),
        ]
        second_repo_file_changes = [
            os.path.join("jstests", "test2.js"),
        ]
        changed_files_mock.side_effect = [first_repo_file_changes, second_repo_file_changes]

        self.assertEqual(3, len(under_test.find_changed_files_in_repos(repos_mock)))