From patchwork Mon Oct  7 18:14:55 2019
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Subject: [2, of, 2,
 BLACKGNAROCK-V2] formatting: introduce a `test-check-format-black.t`
 that enforce formatting
From: Pierre-Yves David <pierre-yves.david@ens-lyon.org>
X-Patchwork-Id: 42069
Message-Id: <c5294d305666f3b5de9a.1570472095@nodosa.octobus.net>
To: mercurial-devel@mercurial-scm.org
Cc: raf@durin42.com
Date: Mon, 07 Oct 2019 14:14:55 -0400

# HG changeset patch
# User Pierre-Yves David <pierre-yves.david@octobus.net>
# Date 1570463578 14400
#      Mon Oct 07 11:52:58 2019 -0400
# Node ID c5294d305666f3b5de9a001c9327ec8eab97eee5
# Parent  3c5fc04c5cbc3b146105b0e6764634c77067dbd5
# EXP-Topic blackgnarok-bytemageddon
# Available At https://bitbucket.org/octobus/mercurial-devel/
#              hg pull https://bitbucket.org/octobus/mercurial-devel/ -r c5294d305666
formatting: introduce a `test-check-format-black.t` that enforce formatting

This should prevent use to drift away from the expect format.

diff --git a/tests/hghave.py b/tests/hghave.py
--- a/tests/hghave.py
+++ b/tests/hghave.py
@@ -1,4 +1,4 @@
-from __future__ import absolute_import
+from __future__ import absolute_import, print_function
 
 import os
 import re
@@ -972,3 +972,14 @@ def has_emacs():
     # 24.4, so we allow emacs 24.4, 24.5, and 25+ (24.5 was the last
     # 24 release)
     return matchoutput('emacs --version', b'GNU Emacs 2(4.4|4.5|5|6|7|8|9)')
+
+
+# @check('black', 'the black formatter for python')
+@check('grey', 'grey, the fork of the black formatter for python')
+def has_black():
+    # use that to actual black as soon as possible
+    # blackcmd = b'black --version'
+    blackcmd = b'python3 $RUNTESTDIR/../contrib/grey.py --version'
+    # version_regex = b'black, version \d'
+    version_regex = b'grey.py, version \d'
+    return matchoutput(blackcmd, version_regex)
diff --git a/tests/test-check-format.t b/tests/test-check-format.t
new file mode 100644
--- /dev/null
+++ b/tests/test-check-format.t
@@ -0,0 +1,7 @@
+#require grey
+
+(this should use the actual black as soon as possible)
+
+  $ cd $RUNTESTDIR/..
+  $ python3 contrib/grey.py -S --quiet --check --diff `hg files 'set:**.py - hgext/fsmonitor/pywatchman/** - mercurial/thirdparty/** - "contrib/python-zstandard/**" - contrib/grey.py'`
+