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Testing single head enforcement: Case A-2

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A repository is set to only accept a single head per name (typically named

branch). However, obsolete changesets can make this enforcement more

complicated, because they can be kept visible by other changeset on other

branch.

This case is part of a series of tests checking this behavior.

Category A: Involving obsolescence

TestCase 2: A branch is split in two, effectively creating two heads

.. old-state:

..

.. * 2 changeset changeset on branch default

.. * 2 changeset changeset on branch Z on top of them.

..

.. new-state:

..

.. * 2 changeset changeset on branch Z at the same location

.. * 1 changeset changeset on branch default unchanged

.. * 1 changeset changeset on branch default superceeding the other ones

..

.. expected-result:

..

.. * two heads detected

..

.. graph-summary:

..

..   D ●      (branch Z)

..     |

..   C ●      (branch Z)

..     |

..   B ø⇠◔ B'

..     | |

..   A ● |

..     |/

..     ●

  $ . $TESTDIR/testlib/topic_setup.sh

  $ . $TESTDIR/testlib/push-checkheads-util.sh

Test setup

----------

  $ mkdir A2

  $ cd A2

  $ setuprepos single-head

  creating basic server and client repo

  updating to branch default

  2 files updated, 0 files merged, 0 files removed, 0 files unresolved

  $ cd client

  $ mkcommit B0

  $ hg branch Z

  marked working directory as branch Z

  (branches are permanent and global, did you want a bookmark?)

  $ mkcommit C0

  $ mkcommit D0

  $ hg push --new-branch

  pushing to $TESTTMP/A2/server

  searching for changes

  adding changesets

  adding manifests

  adding file changes

  added 3 changesets with 3 changes to 3 files

  $ hg up 0

  0 files updated, 0 files merged, 4 files removed, 0 files unresolved

  $ mkcommit B1

  created new head

  (consider using topic for lightweight branches. See 'hg help topic')

  $ hg debugobsolete `getid "desc(B0)" ` `getid "desc(B1)"`

  obsoleted 1 changesets

  2 new orphan changesets

  $ hg log -G --hidden

  @  25c56d33e4c4 [default] (draft): B1

  |

  | *  cdf1dbb37a67 [Z] (draft): D0

  | |

  | *  3213e3e16c67 [Z] (draft): C0

  | |

  | x  d73caddc5533 [default] (draft): B0

  | |

  | o  8aaa48160adc [default] (draft): A0

  |/

  o  1e4be0697311 [default] (public): root

Actual testing

--------------

(force push to make sure we get the changeset on the remote)

  $ hg push -r 'desc("B1")' --force

  pushing to $TESTTMP/A2/server

  searching for changes

  adding changesets

  adding manifests

  adding file changes

  added 1 changesets with 1 changes to 1 files (+1 heads)

  1 new obsolescence markers

  transaction abort!

  rollback completed

  abort: rejecting multiple heads on branch "default"

  (2 heads: 8aaa48160adc 25c56d33e4c4)

  [255]