view tests/test-issue1877.t @ 43781:b65bd4b61d78

dateutil: correct default for Ymd in parsedate

The code uses `0` for the default value of Ymd (year, month, and day), which
seems suboptimal. For example, these will fail to parse:

  dateutil.parsedate('2000', formats=dateutil.extendeddateformats)
  dateutil.parsedate('Jan 2000', formats=dateutil.extendeddateformats)

Fix it by providing sane defaults (1 instead of 0) for year, month, and day.

The suboptimal behavior was introduced by 91bc001a592 (2010-12-29,
"date: fix matching of underspecified date ranges"), which does not seem to
justify the current behavior.

Note end-users should not notice the subtle issue, because there are no formats
in `defaultdateformats` that allow an explicit year with omitted month, or an
explicit month with omitted day.

Differential Revision: https://phab.mercurial-scm.org/D7520

https://bz.mercurial-scm.org/1877

  $ hg init a
  $ cd a
  $ echo a > a
  $ hg add a
  $ hg ci -m 'a'
  $ echo b > a
  $ hg ci -m'b'
  $ hg up 0
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ hg book main
  $ hg book
   * main                      0:cb9a9f314b8b
  $ echo c > c
  $ hg add c
  $ hg ci -m'c'
  created new head
  $ hg book
   * main                      2:d36c0562f908
  $ hg heads
  changeset:   2:d36c0562f908
  bookmark:    main
  tag:         tip
  parent:      0:cb9a9f314b8b
  user:        test
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     c
  
  changeset:   1:1e6c11564562
  user:        test
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     b
  
  $ hg up 1e6c11564562
  1 files updated, 0 files merged, 1 files removed, 0 files unresolved
  (leaving bookmark main)
  $ hg merge main
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  (branch merge, don't forget to commit)
  $ hg book
     main                      2:d36c0562f908
  $ hg ci -m'merge'
  $ hg book
     main                      2:d36c0562f908

  $ cd ..