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Test repository filtering avoidance

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This test file is a bit special as he does not check feature, but performance related internal code path.

Right now, filtering a repository comes with a cost that might be significant.

Until this get better, ther are various operation that try hard not to trigger

a filtering computation. This test file make sure we don't reintroduce code that trigger the filtering for these operation:

Setup

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  $ hg init test-repo

  $ cd test-repo

  $ echo "some line" > z

  $ echo a > a

  $ hg commit -Am a

  adding a

  adding z

  $ echo "in a" >> z

  $ echo b > b

  $ hg commit -Am b

  adding b

  $ echo "file" >> z

  $ echo c > c

  $ hg commit -Am c

  adding c

  $ hg rm a

  $ echo c1 > c

  $ hg add c

  c already tracked!

  $ echo d > d

  $ hg add d

  $ rm b

  $ cat << EOF >> $HGRCPATH

  > [devel]

  > debug.repo-filters = yes

  > [ui]

  > debug = yes

  > EOF

tests

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Getting the node of `null`

  $ hg init test-repo

  $ cd test-repo

  $ hg log -r null -T "{node}\n"

  0000000000000000000000000000000000000000