testlib: adjust wait-on-file timeout according to the global test timeout

Lets assume that if test timeout have been set to be twice as long, it means
local timeout should be twice as long too.

I am not aware of any case were extending timeout for file based synchronisation
was necessary, but the safety seems simple to implements.

Differential Revision: https://phab.mercurial-scm.org/D8316

tests/run-tests.py

@@ -321,7 +321,7 b" IMPL_PATH = b'PYTHONPATH'"
 if 'java' in sys.platform:
     IMPL_PATH = b'JYTHONPATH'
 
-defaults = {
+default_defaults = {
     'jobs': ('HGTEST_JOBS', multiprocessing.cpu_count()),
     'timeout': ('HGTEST_TIMEOUT', 180),
     'slowtimeout': ('HGTEST_SLOWTIMEOUT', 1500),
@@ -329,6 +329,8 b' defaults = {'
     'shell': ('HGTEST_SHELL', 'sh'),
 }
 
+defaults = default_defaults.copy()
+
 
 def canonpath(path):
     return os.path.realpath(os.path.expanduser(path))
@@ -1327,6 +1329,9 b' class Test(unittest.TestCase):'
         env['TESTTMP'] = _bytes2sys(self._testtmp)
         env['TESTNAME'] = self.name
         env['HOME'] = _bytes2sys(self._testtmp)
+        formated_timeout = _bytes2sys(b"%d" % default_defaults['timeout'][1])
+        env['HGTEST_TIMEOUT_DEFAULT'] = formated_timeout
+        env['HGTEST_TIMEOUT'] = _bytes2sys(b"%d" % self._timeout)
         # This number should match portneeded in _getport
         for port in xrange(3):
             # This list should be parallel to _portmap in _getreplacements

tests/testlib/wait-on-file

@@ -10,6 +10,12 b' if [ $# -lt 2 ] || [ $# -gt 3 ]; then'
 fi
 
 timer="$1"
+
+# if the test timeout have been extended, explicitly extend the provided timer
+if [ "$HGTEST_TIMEOUT_DEFAULT" -lt "$HGTEST_TIMEOUT" ]; then
+    timer=$(( ("$timer" * "$HGTEST_TIMEOUT") / $HGTEST_TIMEOUT_DEFAULT ))
+fi
+
 wait_on="$2"
 create=""
 if [ $# -eq 3 ]; then