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from __future__ import with_statement

import codecs
import os
import tempfile
import unittest

from StringIO import StringIO

from webkitpy.common.checkout.changelog import *


class ChangeLogTest(unittest.TestCase):

    _example_entry = u'''2009-08-17  Peter Kasting  <pkasting@google.com>

        Reviewed by Tor Arne Vestb\xf8.

        https://bugs.webkit.org/show_bug.cgi?id=27323
        Only add Cygwin to the path when it isn't already there.  This avoids
        causing problems for people who purposefully have non-Cygwin versions of
        executables like svn in front of the Cygwin ones in their paths.

        * DumpRenderTree/win/DumpRenderTree.vcproj:
        * DumpRenderTree/win/ImageDiff.vcproj:
        * DumpRenderTree/win/TestNetscapePlugin/TestNetscapePlugin.vcproj:
'''

    _rolled_over_footer = '== Rolled over to ChangeLog-2009-06-16 =='

    # More example text than we need.  Eventually we need to support parsing this all and write tests for the parsing.
    _example_changelog = u"""2009-08-17  Tor Arne Vestb\xf8  <vestbo@webkit.org>

        <http://webkit.org/b/28393> check-webkit-style: add check for use of std::max()/std::min() instead of MAX()/MIN()

        Reviewed by David Levin.

        * Scripts/modules/cpp_style.py:
        (_ERROR_CATEGORIES): Added 'runtime/max_min_macros'.
        (check_max_min_macros): Added.  Returns level 4 error when MAX()
        and MIN() macros are used in header files and C++ source files.
        (check_style): Added call to check_max_min_macros().
        * Scripts/modules/cpp_style_unittest.py: Added unit tests.
        (test_max_macro): Added.
        (test_min_macro): Added.

2009-08-16  David Kilzer  <ddkilzer@apple.com>

        Backed out r47343 which was mistakenly committed

        * Scripts/bugzilla-tool:
        * Scripts/modules/scm.py:

2009-06-18  Darin Adler  <darin@apple.com>

        Rubber stamped by Mark Rowe.

        * DumpRenderTree/mac/DumpRenderTreeWindow.mm:
        (-[DumpRenderTreeWindow close]): Resolved crashes seen during regression
        tests. The close method can be called on a window that's already closed
        so we can't assert here.

== Rolled over to ChangeLog-2009-06-16 ==
"""

    def test_latest_entry_parse(self):
        changelog_contents = u"%s\n%s" % (self._example_entry, self._example_changelog)
        changelog_file = StringIO(changelog_contents)
        latest_entry = ChangeLog.parse_latest_entry_from_file(changelog_file)
        self.assertEquals(latest_entry.contents(), self._example_entry)
        self.assertEquals(latest_entry.author_name(), "Peter Kasting")
        self.assertEquals(latest_entry.author_email(), "pkasting@google.com")
        self.assertEquals(latest_entry.reviewer_text(), u"Tor Arne Vestb\xf8")
        self.assertTrue(latest_entry.reviewer())  # Make sure that our UTF8-based lookup of Tor works.

    def test_latest_entry_parse_single_entry(self):
        changelog_contents = u"%s\n%s" % (self._example_entry, self._rolled_over_footer)
        changelog_file = StringIO(changelog_contents)
        latest_entry = ChangeLog.parse_latest_entry_from_file(changelog_file)
        self.assertEquals(latest_entry.contents(), self._example_entry)
        self.assertEquals(latest_entry.author_name(), "Peter Kasting")

    @staticmethod
    def _write_tmp_file_with_contents(byte_array):
        assert(isinstance(byte_array, str))
        (file_descriptor, file_path) = tempfile.mkstemp() # NamedTemporaryFile always deletes the file on close in python < 2.6
        with os.fdopen(file_descriptor, "w") as file:
            file.write(byte_array)
        return file_path

    @staticmethod
    def _read_file_contents(file_path, encoding):
        with codecs.open(file_path, "r", encoding) as file:
            return file.read()

    _new_entry_boilerplate = '''2009-08-19  Eric Seidel  <eric@webkit.org>

        Reviewed by NOBODY (OOPS!).

        Need a short description and bug URL (OOPS!)

        * Scripts/bugzilla-tool:
'''

    def test_set_reviewer(self):
        changelog_contents = u"%s\n%s" % (self._new_entry_boilerplate, self._example_changelog)
        changelog_path = self._write_tmp_file_with_contents(changelog_contents.encode("utf-8"))
        reviewer_name = 'Test Reviewer'
        ChangeLog(changelog_path).set_reviewer(reviewer_name)
        actual_contents = self._read_file_contents(changelog_path, "utf-8")
        expected_contents = changelog_contents.replace('NOBODY (OOPS!)', reviewer_name)
        os.remove(changelog_path)
        self.assertEquals(actual_contents, expected_contents)

    def test_set_short_description_and_bug_url(self):
        changelog_contents = u"%s\n%s" % (self._new_entry_boilerplate, self._example_changelog)
        changelog_path = self._write_tmp_file_with_contents(changelog_contents.encode("utf-8"))
        short_description = "A short description"
        bug_url = "http://example.com/b/2344"
        ChangeLog(changelog_path).set_short_description_and_bug_url(short_description, bug_url)
        actual_contents = self._read_file_contents(changelog_path, "utf-8")
        expected_message = "%s\n        %s" % (short_description, bug_url)
        expected_contents = changelog_contents.replace("Need a short description and bug URL (OOPS!)", expected_message)
        os.remove(changelog_path)
        self.assertEquals(actual_contents, expected_contents)