# HG changeset patch
# User Pierre-Yves David <pierre-yves.david@octobus.net>
# Date 1570463578 14400
# Node ID fb41ea2ea076be26354586abc78c7cda42c267df
# Parent  e8cf9ad52a785a3fd1efdad04b5ce591dc2cc4e1
formatting: introduce a `test-check-format-black.t` that enforce formatting

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

diff -r e8cf9ad52a78 -r fb41ea2ea076 tests/hghave.py
--- a/tests/hghave.py	Mon Oct 07 10:58:51 2019 -0400
+++ b/tests/hghave.py	Mon Oct 07 11:52:58 2019 -0400
@@ -1,4 +1,4 @@
-from __future__ import absolute_import
+from __future__ import absolute_import, print_function
 
 import os
 import re
@@ -972,3 +972,14 @@
     # 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 -r e8cf9ad52a78 -r fb41ea2ea076 tests/test-check-format.t
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/tests/test-check-format.t	Mon Oct 07 11:52:58 2019 -0400
@@ -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'`
+