#!/usr/bin/env python3
# Copyright 2021 The Chromium Authors
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.

from io import StringIO
import os
import sys
from typing import Dict
import unittest
import tempfile

from generate_framework_tests_and_coverage import (
    generate_framework_tests_and_coverage,
)
from models import TestPartitionDescription
from models import TestPlatform

TEST_DATA_DIR = os.path.join(
    os.path.dirname(os.path.abspath(__file__)), "test_data"
)


class GenerateFrameworkTestsAndCoverageTest(unittest.TestCase):
    def test_coverage(self):
        actions_filename = os.path.join(TEST_DATA_DIR, "test_actions.md")
        enums_filename = os.path.join(TEST_DATA_DIR, "test_enums.md")
        supported_actions_filename = os.path.join(
            TEST_DATA_DIR, "framework_supported_actions.csv"
        )

        coverage_filename = os.path.join(
            TEST_DATA_DIR, "test_unprocessed_coverage.md"
        )

        custom_partitions = [
            TestPartitionDescription(
                action_name_prefixes={"state_change_b"},
                browsertest_dir=TEST_DATA_DIR,
                test_file_prefix="tests_change_b",
                test_fixture="TwoClientWebAppsIntegrationSyncTest",
            )
        ]
        default_partition = TestPartitionDescription(
            action_name_prefixes=set(),
            browsertest_dir=TEST_DATA_DIR,
            test_file_prefix="tests_default",
            test_fixture="WebAppIntegrationTest",
        )

        with (
            open(actions_filename, "r", encoding="utf-8") as actions_file,
            open(
                supported_actions_filename, "r", encoding="utf-8"
            ) as supported_actions_file,
            open(coverage_filename, "r", encoding="utf-8") as coverage_file,
            open(enums_filename, "r", encoding="utf-8") as enums,
            tempfile.TemporaryDirectory() as output_dir,
        ):
            capturedOutput = StringIO()
            sys.stdout = capturedOutput
            generate_framework_tests_and_coverage(
                supported_actions_file,
                enums,
                actions_file,
                coverage_file,
                custom_partitions,
                default_partition,
                output_dir,
                None,
            )
            # The framework uses stdout to inform the developer of tests that
            # need to be added or removed. Since there should be no tests
            # changes required, nothing should be printed to stdout.
            self.assertFalse(capturedOutput.read())
            sys.stdout = sys.__stdout__

            for platform in TestPlatform:
                file_title = "coverage_" + platform.suffix + ".tsv"
                gen_coverage_filename = os.path.join(output_dir, file_title)
                expected_coverage_filename = os.path.join(
                    TEST_DATA_DIR, "expected_" + file_title
                )
                with (
                    open(
                        gen_coverage_filename, "r", encoding="utf-8"
                    ) as coverage_file,
                    open(
                        expected_coverage_filename, "r", encoding="utf-8"
                    ) as expected_file,
                ):
                    self.assertListEqual(
                        list(expected_file.readlines()),
                        list(coverage_file.readlines()),
                        f"file: {expected_coverage_filename}",
                    )


if __name__ == '__main__':
    unittest.main()