from __future__ import absolute_import
from __future__ import print_function

import unittest

from mercurial import (
    mdiff,
)
from mercurial.context import (
    _annotatepair,
)

class AnnotateTests(unittest.TestCase):
    """Unit tests for annotate code."""

    def testannotatepair(self):
        self.maxDiff = None # camelcase-required

        oldfctx = b'old'
        p1fctx, p2fctx, childfctx = b'p1', b'p2', b'c'
        olddata = b'a\nb\n'
        p1data = b'a\nb\nc\n'
        p2data = b'a\nc\nd\n'
        childdata = b'a\nb2\nc\nc2\nd\n'
        diffopts = mdiff.diffopts()

        def decorate(text, rev):
            return ([(rev, i) for i in xrange(1, text.count(b'\n') + 1)], text)

        # Basic usage

        oldann = decorate(olddata, oldfctx)
        p1ann = decorate(p1data, p1fctx)
        p1ann = _annotatepair([oldann], p1fctx, p1ann, False, diffopts)
        self.assertEqual(p1ann[0], [('old', 1), ('old', 2), ('p1', 3)])

        p2ann = decorate(p2data, p2fctx)
        p2ann = _annotatepair([oldann], p2fctx, p2ann, False, diffopts)
        self.assertEqual(p2ann[0], [('old', 1), ('p2', 2), ('p2', 3)])

        # Test with multiple parents (note the difference caused by ordering)

        childann = decorate(childdata, childfctx)
        childann = _annotatepair([p1ann, p2ann], childfctx, childann, False,
                                 diffopts)
        self.assertEqual(childann[0],
            [('old', 1), ('c', 2), ('p2', 2), ('c', 4), ('p2', 3)]
        )

        childann = decorate(childdata, childfctx)
        childann = _annotatepair([p2ann, p1ann], childfctx, childann, False,
                                 diffopts)
        self.assertEqual(childann[0],
            [('old', 1), ('c', 2), ('p1', 3), ('c', 4), ('p2', 3)]
        )

        # Test with skipchild (note the difference caused by ordering)

        childann = decorate(childdata, childfctx)
        childann = _annotatepair([p1ann, p2ann], childfctx, childann, True,
                                 diffopts)
        self.assertEqual(childann[0],
            [('old', 1), ('old', 2), ('p2', 2), ('p2', 2), ('p2', 3)]
        )

        childann = decorate(childdata, childfctx)
        childann = _annotatepair([p2ann, p1ann], childfctx, childann, True,
                                 diffopts)
        self.assertEqual(childann[0],
            [('old', 1), ('old', 2), ('p1', 3), ('p1', 3), ('p2', 3)]
        )

if __name__ == '__main__':
    import silenttestrunner
    silenttestrunner.main(__name__)