From patchwork Tue Mar 14 07:03:52 2017
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Subject: [1, of,
 2] tests: duplicate test for pager for old extension and for in-core
 pager
From: via Mercurial-devel <mercurial-devel@mercurial-scm.org>
X-Patchwork-Id: 19329
Message-Id: <d17402c07698443c13b0.1489475032@martinvonz.mtv.corp.google.com>
To: mercurial-devel@mercurial-scm.org
Date: Tue, 14 Mar 2017 00:03:52 -0700

# HG changeset patch
# User Martin von Zweigbergk <martinvonz@google.com>
# Date 1489466579 25200
#      Mon Mar 13 21:42:59 2017 -0700
# Node ID d17402c07698443c13b082df8a8635a82b83d097
# Parent  3d3109339b57341b333c1112beb41dd281fa944a
tests: duplicate test for pager for old extension and for in-core pager

When the old pager extension is enabled, I think we should try to be
as BC as reasonable. To help with that, this patch brings back
test-pager.t as of 65a3b4d67a65 (pager: add a test of --pager=no
functionality, 2017-02-06), but under the name test-pager-legacy.t
However, since the behavior has changed in a few cases (notably by no
longer respecting pager.attend), the file is modified to work with the
current version. We will recover some lost BC in coming patches.

Also, to make sure the in-core pager does not depend on the pager
extension being enabled, this patch disables the extension in
test-pager.t. It turns out that pager.attend-$cmd was only supported
when the pager extension was enabled, so the tests are updated to
reflect that. We will need to decide what to do with these.

diff -r 3d3109339b57 -r d17402c07698 tests/test-pager-legacy.t
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/tests/test-pager-legacy.t	Mon Mar 13 21:42:59 2017 -0700
@@ -0,0 +1,234 @@
+  $ cat >> fakepager.py <<EOF
+  > import sys
+  > for line in sys.stdin:
+  >     sys.stdout.write('paged! %r\n' % line)
+  > EOF
+
+Enable ui.formatted because pager won't fire without it, and set up
+pager and tell it to use our fake pager that lets us see when the
+pager was running.
+  $ cat >> $HGRCPATH <<EOF
+  > [ui]
+  > formatted = yes
+  > [extensions]
+  > pager=
+  > [pager]
+  > pager = python $TESTTMP/fakepager.py
+  > EOF
+
+  $ hg init repo
+  $ cd repo
+  $ echo a >> a
+  $ hg add a
+  $ hg ci -m 'add a'
+  $ for x in `python $TESTDIR/seq.py 1 10`; do
+  >   echo a $x >> a
+  >   hg ci -m "modify a $x"
+  > done
+
+By default diff and log are paged, but summary is not:
+
+  $ hg diff -c 2 --pager=yes
+  paged! 'diff -r f4be7687d414 -r bce265549556 a\n'
+  paged! '--- a/a\tThu Jan 01 00:00:00 1970 +0000\n'
+  paged! '+++ b/a\tThu Jan 01 00:00:00 1970 +0000\n'
+  paged! '@@ -1,2 +1,3 @@\n'
+  paged! ' a\n'
+  paged! ' a 1\n'
+  paged! '+a 2\n'
+
+  $ hg log --limit 2
+  paged! 'changeset:   10:46106edeeb38\n'
+  paged! 'tag:         tip\n'
+  paged! 'user:        test\n'
+  paged! 'date:        Thu Jan 01 00:00:00 1970 +0000\n'
+  paged! 'summary:     modify a 10\n'
+  paged! '\n'
+  paged! 'changeset:   9:6dd8ea7dd621\n'
+  paged! 'user:        test\n'
+  paged! 'date:        Thu Jan 01 00:00:00 1970 +0000\n'
+  paged! 'summary:     modify a 9\n'
+  paged! '\n'
+
+BROKEN: should not be paged by default
+  $ hg summary
+  paged! 'parent: 10:46106edeeb38 tip\n'
+  paged! ' modify a 10\n'
+  paged! 'branch: default\n'
+  paged! 'commit: (clean)\n'
+  paged! 'update: (current)\n'
+  paged! 'phases: 11 draft\n'
+
+We can enable the pager on summary:
+
+  $ hg --config pager.attend-summary=yes summary
+  paged! 'parent: 10:46106edeeb38 tip\n'
+  paged! ' modify a 10\n'
+  paged! 'branch: default\n'
+  paged! 'commit: (clean)\n'
+  paged! 'update: (current)\n'
+  paged! 'phases: 11 draft\n'
+
+  $ hg --config pager.attend-diff=no diff -c 2
+  diff -r f4be7687d414 -r bce265549556 a
+  --- a/a	Thu Jan 01 00:00:00 1970 +0000
+  +++ b/a	Thu Jan 01 00:00:00 1970 +0000
+  @@ -1,2 +1,3 @@
+   a
+   a 1
+  +a 2
+
+If we completely change the attend list that's respected:
+BROKEN: diff should not be paged
+  $ hg --config pager.attend=summary diff -c 2
+  paged! 'diff -r f4be7687d414 -r bce265549556 a\n'
+  paged! '--- a/a\tThu Jan 01 00:00:00 1970 +0000\n'
+  paged! '+++ b/a\tThu Jan 01 00:00:00 1970 +0000\n'
+  paged! '@@ -1,2 +1,3 @@\n'
+  paged! ' a\n'
+  paged! ' a 1\n'
+  paged! '+a 2\n'
+
+If 'log' is in attend, then 'history' should also be paged:
+  $ hg history --limit 2 --config pager.attend=log
+  paged! 'changeset:   10:46106edeeb38\n'
+  paged! 'tag:         tip\n'
+  paged! 'user:        test\n'
+  paged! 'date:        Thu Jan 01 00:00:00 1970 +0000\n'
+  paged! 'summary:     modify a 10\n'
+  paged! '\n'
+  paged! 'changeset:   9:6dd8ea7dd621\n'
+  paged! 'user:        test\n'
+  paged! 'date:        Thu Jan 01 00:00:00 1970 +0000\n'
+  paged! 'summary:     modify a 9\n'
+  paged! '\n'
+
+Possible bug: history is explicitly ignored in pager config, but
+because log is in the attend list it still gets pager treatment.
+
+  $ hg history --limit 2 --config pager.attend=log \
+  >   --config pager.ignore=history
+  paged! 'changeset:   10:46106edeeb38\n'
+  paged! 'tag:         tip\n'
+  paged! 'user:        test\n'
+  paged! 'date:        Thu Jan 01 00:00:00 1970 +0000\n'
+  paged! 'summary:     modify a 10\n'
+  paged! '\n'
+  paged! 'changeset:   9:6dd8ea7dd621\n'
+  paged! 'user:        test\n'
+  paged! 'date:        Thu Jan 01 00:00:00 1970 +0000\n'
+  paged! 'summary:     modify a 9\n'
+  paged! '\n'
+
+Possible bug: history is explicitly marked as attend-history=no, but
+it doesn't fail to get paged because log is still in the attend list.
+
+  $ hg history --limit 2 --config pager.attend-history=no
+  paged! 'changeset:   10:46106edeeb38\n'
+  paged! 'tag:         tip\n'
+  paged! 'user:        test\n'
+  paged! 'date:        Thu Jan 01 00:00:00 1970 +0000\n'
+  paged! 'summary:     modify a 10\n'
+  paged! '\n'
+  paged! 'changeset:   9:6dd8ea7dd621\n'
+  paged! 'user:        test\n'
+  paged! 'date:        Thu Jan 01 00:00:00 1970 +0000\n'
+  paged! 'summary:     modify a 9\n'
+  paged! '\n'
+
+Possible bug: disabling pager for log but enabling it for history
+doesn't result in history being paged.
+
+  $ hg history --limit 2 --config pager.attend-log=no \
+  > --config pager.attend-history=yes
+  changeset:   10:46106edeeb38
+  tag:         tip
+  user:        test
+  date:        Thu Jan 01 00:00:00 1970 +0000
+  summary:     modify a 10
+  
+  changeset:   9:6dd8ea7dd621
+  user:        test
+  date:        Thu Jan 01 00:00:00 1970 +0000
+  summary:     modify a 9
+  
+Pager should not start if stdout is not a tty.
+
+  $ hg log -l1 -q --config ui.formatted=False
+  10:46106edeeb38
+
+Pager with color enabled allows colors to come through by default,
+even though stdout is no longer a tty.
+  $ cat >> $HGRCPATH <<EOF
+  > [extensions]
+  > color=
+  > [color]
+  > mode = ansi
+  > EOF
+  $ hg log --limit 3
+  paged! '\x1b[0;33mchangeset:   10:46106edeeb38\x1b[0m\n'
+  paged! 'tag:         tip\n'
+  paged! 'user:        test\n'
+  paged! 'date:        Thu Jan 01 00:00:00 1970 +0000\n'
+  paged! 'summary:     modify a 10\n'
+  paged! '\n'
+  paged! '\x1b[0;33mchangeset:   9:6dd8ea7dd621\x1b[0m\n'
+  paged! 'user:        test\n'
+  paged! 'date:        Thu Jan 01 00:00:00 1970 +0000\n'
+  paged! 'summary:     modify a 9\n'
+  paged! '\n'
+  paged! '\x1b[0;33mchangeset:   8:cff05a6312fe\x1b[0m\n'
+  paged! 'user:        test\n'
+  paged! 'date:        Thu Jan 01 00:00:00 1970 +0000\n'
+  paged! 'summary:     modify a 8\n'
+  paged! '\n'
+
+Pager works with shell aliases.
+
+  $ cat >> $HGRCPATH <<EOF
+  > [alias]
+  > echoa = !echo a
+  > EOF
+
+  $ hg echoa
+  a
+  $ hg --config pager.attend-echoa=yes echoa
+  paged! 'a\n'
+
+Pager works with hg aliases including environment variables.
+
+  $ cat >> $HGRCPATH <<'EOF'
+  > [alias]
+  > printa = log -T "$A\n" -r 0
+  > EOF
+
+  $ A=1 hg --config pager.attend-printa=yes printa
+  paged! '1\n'
+  $ A=2 hg --config pager.attend-printa=yes printa
+  paged! '2\n'
+
+Something that's explicitly attended is still not paginated if the
+pager is globally set to off using a flag:
+  $ A=2 hg --config pager.attend-printa=yes printa --pager=no
+  2
+
+Pager should not override the exit code of other commands
+
+  $ cat >> $TESTTMP/fortytwo.py <<'EOF'
+  > from mercurial import cmdutil, commands
+  > cmdtable = {}
+  > command = cmdutil.command(cmdtable)
+  > @command('fortytwo', [], 'fortytwo', norepo=True)
+  > def fortytwo(ui, *opts):
+  >     ui.write('42\n')
+  >     return 42
+  > EOF
+
+  $ cat >> $HGRCPATH <<'EOF'
+  > [extensions]
+  > fortytwo = $TESTTMP/fortytwo.py
+  > EOF
+
+  $ hg fortytwo --pager=on
+  paged! '42\n'
+  [42]
diff -r 3d3109339b57 -r d17402c07698 tests/test-pager.t
--- a/tests/test-pager.t	Mon Mar 13 11:19:24 2017 -0700
+++ b/tests/test-pager.t	Mon Mar 13 21:42:59 2017 -0700
@@ -10,8 +10,6 @@
   $ cat >> $HGRCPATH <<EOF
   > [ui]
   > formatted = yes
-  > [extensions]
-  > pager=
   > [pager]
   > pager = python $TESTTMP/fakepager.py
   > EOF
@@ -55,12 +53,12 @@
 
 We can enable the pager on id:
 
+BROKEN: should be paged
   $ hg --config pager.attend-id=yes id
-  paged! '46106edeeb38 tip\n'
+  46106edeeb38 tip
 
 Setting attend-$COMMAND to a false value works, even with pager in
 core:
-
   $ hg --config pager.attend-diff=no diff -c 2
   diff -r f4be7687d414 -r bce265549556 a
   --- a/a	Thu Jan 01 00:00:00 1970 +0000
@@ -130,8 +128,9 @@
 
   $ hg echoa
   a
+BROKEN: should be paged
   $ hg --config pager.attend-echoa=yes echoa
-  paged! 'a\n'
+  a
 
 Pager works with hg aliases including environment variables.