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import unittest

from webkitpy.common.system.outputcapture import OutputCapture
from webkitpy.thirdparty.mock import Mock
from webkitpy.tool.mocktool import MockOptions, MockTool
from webkitpy.tool.steps.validatechangelogs import ValidateChangeLogs


class ValidateChangeLogsTest(unittest.TestCase):

    def _assert_start_line_produces_output(self, start_line, should_fail=False, non_interactive=False):
        tool = MockTool()
        tool._checkout.is_path_to_changelog = lambda path: True
        step = ValidateChangeLogs(tool, MockOptions(git_commit=None, non_interactive=non_interactive))
        diff_file = Mock()
        diff_file.filename = "mock/ChangeLog"
        diff_file.lines = [(start_line, start_line, "foo")]
        expected_stdout = expected_stderr = ""
        if should_fail and not non_interactive:
            expected_stderr = "The diff to mock/ChangeLog looks wrong.  Are you sure your ChangeLog entry is at the top of the file?\nOK to continue?\n"
        result = OutputCapture().assert_outputs(self, step._check_changelog_diff, [diff_file], expected_stderr=expected_stderr)
        self.assertEqual(not result, should_fail)

    def test_check_changelog_diff(self):
        self._assert_start_line_produces_output(1)
        self._assert_start_line_produces_output(7)
        self._assert_start_line_produces_output(8, should_fail=True)

        self._assert_start_line_produces_output(1, non_interactive=False)
        self._assert_start_line_produces_output(8, non_interactive=True, should_fail=True)