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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 B: Involving obsolescence with topic

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

.. old-state:

..

.. * 2 changeset changeset on topic X

.. * 2 changeset changeset on topic Y on top of them.

..

.. new-state:

..

.. * 2 changeset changeset on topic Y at the same location

.. * 1 changeset changeset on topic X unchanged

.. * 1 changeset changeset on topic X superceeding the other ones

..

.. expected-result:

..

.. * two heads detected

..

.. graph-summary:

..

..   D ●      (topic-Y)

..     |

..   C ●      (topic-Y)

..     |

..   B ø⇠◔ B' (topic-X)

..     | |

..   A ● |    (topic-X)

..     |/

..     ●

  $ . $TESTDIR/testlib/topic_setup.sh

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

Test setup

----------

  $ mkdir B2

  $ cd B2

  $ 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

  $ hg topic -r . topic-X

  switching to topic topic-X

  changed topic on 1 changesets to "topic-X"

  $ hg strip --config extensions.strip= --hidden 'hidden()' --no-backup # clean old A0

  $ mkcommit B0

  $ hg branch Z

  marked working directory as branch Z

  $ hg topic topic-Y

  $ mkcommit C0

  active topic 'topic-Y' grew its first changeset

  (see 'hg help topics' for more information)

  $ mkcommit D0

  $ hg push --new-branch

  pushing to $TESTTMP/B2/server

  searching for changes

  adding changesets

  adding manifests

  adding file changes

  added 4 changesets with 3 changes to 4 files (+1 heads)

  1 new obsolescence markers

  obsoleted 1 changesets

  $ hg up 0

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

  $ hg topic topic-X

  marked working directory as topic: topic-X

  $ mkcommit B1

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

  1 new obsolescence markers

  obsoleted 1 changesets

  2 new orphan changesets

  $ hg log -G --hidden

  @  5a4735b75167 [default:topic-X] (draft): B1

  |

  | *  02490b2dd1c5 [Z:topic-Y] (draft): D0

  | |

  | *  447ad8382abc [Z:topic-Y] (draft): C0

  | |

  | x  1c1f62b56685 [default:topic-X] (draft): B0

  | |

  | o  5a47a98cd8e5 [default:topic-X] (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/B2/server

  searching for changes

  adding changesets

  adding manifests

  adding file changes

  transaction abort!

  rollback completed

  abort: rejecting multiple heads on branch "default:topic-X"

  (2 heads: 5a47a98cd8e5 5a4735b75167)

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