Adding upstream version 2:4.20.0+dfsg.upstream/2%4.20.0+dfsg

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 108 insertions, 0 deletions

diff --git a/python/samba/tests/blackbox/check_output.py b/python/samba/tests/blackbox/check_output.py
new file mode 100644
index 0000000..7f1e4d1
--- /dev/null
+++ b/python/samba/tests/blackbox/check_output.py
@@ -0,0 +1,108 @@
+# Copyright (C) Catalyst IT Ltd. 2017
+
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+"""
+Blackbox tests for blackboxtest check output methods.
+"""
+
+import signal
+from samba.tests import BlackboxTestCase
+
+
+class TimeoutHelper():
+    """
+    Timeout class using alarm signal.
+
+    Raise a Timeout exception if a function timeout.
+    Usage:
+
+        try:
+            with Timeout(3):
+                foobar("Request 1")
+        except TimeoutHelper.Timeout:
+            print("Timeout")
+    """
+
+    class Timeout(Exception):
+        pass
+
+    def __init__(self, sec):
+        self.sec = sec
+
+    def __enter__(self):
+        signal.signal(signal.SIGALRM, self.raise_timeout)
+        signal.alarm(self.sec)
+
+    def __exit__(self, *args):
+        signal.alarm(0)    # disable alarm
+
+    def raise_timeout(self, *args):
+        raise TimeoutHelper.Timeout()
+
+
+def _make_cmdline(data='$', repeat=(5 * 1024 * 1024), retcode=0):
+    """Build a command to call gen_output.py to generate large output"""
+    return 'gen_output.py --data {0} --repeat {1} --retcode {2}'.format(data,
+                                                                        repeat,
+                                                                        retcode)
+
+
+class CheckOutputTests(BlackboxTestCase):
+    """
+    Blackbox tests for check_xxx methods.
+
+    The check_xxx methods in BlackboxTestCase will deadlock
+    on large output from command which caused by Popen.wait().
+
+    This is a test case to show the deadlock issue,
+    will fix in another commit.
+    """
+
+    def test_check_run_timeout(self):
+        """Call check_run with large output."""
+        try:
+            with TimeoutHelper(10):
+                self.check_run(_make_cmdline())
+        except TimeoutHelper.Timeout:
+            self.fail(msg='Timeout!')
+
+    def test_check_exit_code_with_large_output_success(self):
+        try:
+            with TimeoutHelper(10):
+                self.check_exit_code(_make_cmdline(retcode=0), 0)
+        except TimeoutHelper.Timeout:
+            self.fail(msg='Timeout!')
+
+    def test_check_exit_code_with_large_output_failure(self):
+        try:
+            with TimeoutHelper(10):
+                self.check_exit_code(_make_cmdline(retcode=1), 1)
+        except TimeoutHelper.Timeout:
+            self.fail(msg='Timeout!')
+
+    def test_check_output_with_large_output(self):
+        data = '@'
+        repeat = 5 * 1024 * 1024  # 5M
+        expected = data * repeat
+        cmdline = _make_cmdline(data=data, repeat=repeat)
+
+        try:
+            with TimeoutHelper(10):
+                actual = self.check_output(cmdline)
+                # check_output will return bytes
+                # convert expected to bytes for python 3
+                self.assertEqual(actual, expected.encode('utf-8'))
+        except TimeoutHelper.Timeout:
+            self.fail(msg='Timeout!')