tests/test-mq-qdiff.t

templater: handle None returned from templatedir()

My recent 91aa9bba3dc9 (templater: make templatepaths() return a
single path, or None, 2020-07-21) didn't account for the fact that
`templatedir()` returns `None` in frozen binaries. That is ironic,
since the reason I'm working on this is to add support for built-in
mapfiles in frozen binaries. This patch updates the callers to handle
the `None` case. It's somewhat ugly, but I will have to revisit this
soon anyway, since my goal is to make all callers handle that case by
trying to read the map file using the resources API instead.

Differential Revision: https://phab.mercurial-scm.org/D8810

  $ cat <<EOF >> $HGRCPATH
  > [extensions]
  > mq =
  > [mq]
  > git = keep
  > EOF

  $ hg init a
  $ cd a

  $ echo 'base' > base
  $ hg ci -Ambase
  adding base

  $ hg qnew -mmqbase mqbase

  $ echo 'patched' > base
  $ hg qrefresh

qdiff:

  $ hg qdiff
  diff -r d20a80d4def3 base
  --- a/base	Thu Jan 01 00:00:00 1970 +0000
  +++ b/base* (glob)
  @@ -1,1 +1,1 @@
  -base
  +patched

qdiff dirname:

  $ hg qdiff --nodates .
  diff -r d20a80d4def3 base
  --- a/base
  +++ b/base
  @@ -1,1 +1,1 @@
  -base
  +patched

qdiff filename:

  $ hg qdiff --nodates base
  diff -r d20a80d4def3 base
  --- a/base
  +++ b/base
  @@ -1,1 +1,1 @@
  -base
  +patched

  $ hg revert -a

  $ hg qpop
  popping mqbase
  patch queue now empty

  $ hg qdelete mqbase

  $ printf '1\n2\n3\n4\nhello world\ngoodbye world\n7\n8\n9\n' > lines
  $ hg ci -Amlines -d '2 0'
  adding lines

  $ hg qnew -mmqbase2 mqbase2
  $ printf '\n\n1\n2\n3\n4\nhello  world\n     goodbye world\n7\n8\n9\n' > lines

  $ hg qdiff --nodates -U 1
  diff -r b0c220e1cf43 lines
  --- a/lines
  +++ b/lines
  @@ -1,1 +1,3 @@
  +
  +
   1
  @@ -4,4 +6,4 @@
   4
  -hello world
  -goodbye world
  +hello  world
  +     goodbye world
   7

  $ hg qdiff --nodates -b
  diff -r b0c220e1cf43 lines
  --- a/lines
  +++ b/lines
  @@ -1,9 +1,11 @@
  +
  +
   1
   2
   3
   4
   hello world
  -goodbye world
  +     goodbye world
   7
   8
   9

  $ hg qdiff --nodates -U 1 -B
  diff -r b0c220e1cf43 lines
  --- a/lines
  +++ b/lines
  @@ -4,4 +4,4 @@
   4
  -hello world
  -goodbye world
  +hello  world
  +     goodbye world
   7

  $ hg qdiff --nodates -w
  diff -r b0c220e1cf43 lines
  --- a/lines
  +++ b/lines
  @@ -1,3 +1,5 @@
  +
  +
   1
   2
   3

  $ hg qdiff --nodates --reverse
  diff -r b0c220e1cf43 lines
  --- a/lines
  +++ b/lines
  @@ -1,11 +1,9 @@
  -
  -
   1
   2
   3
   4
  -hello  world
  -     goodbye world
  +hello world
  +goodbye world
   7
   8
   9

qdiff preserve existing git flag:

  $ hg qrefresh --git
  $ echo a >> lines
  $ hg qdiff
  diff --git a/lines b/lines
  --- a/lines
  +++ b/lines
  @@ -1,9 +1,12 @@
  +
  +
   1
   2
   3
   4
  -hello world
  -goodbye world
  +hello  world
  +     goodbye world
   7
   8
   9
  +a

  $ hg qdiff --stat
   lines |  7 +++++--
   1 files changed, 5 insertions(+), 2 deletions(-)
  $ hg qrefresh

qdiff when file deleted (but not removed) in working dir:

  $ hg qnew deleted-file
  $ echo a > newfile
  $ hg add newfile
  $ hg qrefresh
  $ rm newfile
  $ hg qdiff

  $ cd ..