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From 675af6905b424f2a927e4737a53f9b844e0cd9cc Mon Sep 17 00:00:00 2001
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From: Michal Sekletar <msekleta@redhat.com>
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Date: Wed, 15 Feb 2017 12:40:52 +0100
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Subject: [PATCH] tests: add new test for issue #518
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(cherry picked from commit 123d672e85d0c52ff7cf81997d4910990da409c1)
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Related: #1404657, #1471230
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---
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 Makefile.am                       |   3 +-
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 test/test-exec-deserialization.py | 192 ++++++++++++++++++++++++++++++
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 2 files changed, 194 insertions(+), 1 deletion(-)
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 create mode 100755 test/test-exec-deserialization.py
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diff --git a/Makefile.am b/Makefile.am
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index f06bc29c2..c4a96e1fd 100644
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--- a/Makefile.am
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+++ b/Makefile.am
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@@ -5711,7 +5711,8 @@ EXTRA_DIST += \
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 	src/network/networkd-network-gperf.gperf \
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 	src/network/networkd-netdev-gperf.gperf \
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 	units/systemd-networkd.service.in \
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-	units/systemd-networkd-wait-online.service.in
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+	units/systemd-networkd-wait-online.service.in \
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+	test/test-exec-deserialization.py
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 CLEANFILES += \
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 	src/network/networkd-network-gperf.c \
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diff --git a/test/test-exec-deserialization.py b/test/test-exec-deserialization.py
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new file mode 100755
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index 000000000..b974b1c13
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--- /dev/null
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+++ b/test/test-exec-deserialization.py
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@@ -0,0 +1,192 @@
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+#!/usr/bin/python3
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+
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+#
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+#  Copyright 2017 Michal Sekletar <msekleta@redhat.com>
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+#
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+#  systemd is free software; you can redistribute it and/or modify it
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+#  under the terms of the GNU Lesser General Public License as published by
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+#  the Free Software Foundation; either version 2.1 of the License, or
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+#  (at your option) any later version.
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+#
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+#  systemd is distributed in the hope that it will be useful, but
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+#  WITHOUT ANY WARRANTY; without even the implied warranty of
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+#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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+#  Lesser General Public License for more details.
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+#
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+#  You should have received a copy of the GNU Lesser General Public License
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+#  along with systemd; If not, see <http://www.gnu.org/licenses/>.
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+
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+# ATTENTION: This uses the *installed* systemd, not the one from the built
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+# source tree.
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+
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+import unittest
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+import time
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+import os
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+import tempfile
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+import subprocess
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+
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+from enum import Enum
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+
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+class UnitFileChange(Enum):
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+    NO_CHANGE = 0
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+    LINES_SWAPPED = 1
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+    COMMAND_ADDED_BEFORE = 2
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+    COMMAND_ADDED_AFTER = 3
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+    COMMAND_INTERLEAVED = 4
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+    REMOVAL = 5
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+
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+class ExecutionResumeTest(unittest.TestCase):
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+    def setUp(self):
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+        self.unit = 'test-issue-518.service'
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+        self.unitfile_path = '/run/systemd/system/{0}'.format(self.unit)
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+        self.output_file = tempfile.mktemp()
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+        self.unit_files = {}
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+
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+        unit_file_content = '''
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+        [Service]
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+        Type=oneshot
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+        ExecStart=/bin/sleep 2
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+        ExecStart=/bin/bash -c "echo foo >> {0}"
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+        '''.format(self.output_file)
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+        self.unit_files[UnitFileChange.NO_CHANGE] = unit_file_content
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+
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+        unit_file_content = '''
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+        [Service]
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+        Type=oneshot
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+        ExecStart=/bin/bash -c "echo foo >> {0}"
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+        ExecStart=/bin/sleep 2
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+        '''.format(self.output_file)
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+        self.unit_files[UnitFileChange.LINES_SWAPPED] = unit_file_content
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+
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+        unit_file_content = '''
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+        [Service]
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+        Type=oneshot
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+        ExecStart=/bin/bash -c "echo bar >> {0}"
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+        ExecStart=/bin/sleep 2
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+        ExecStart=/bin/bash -c "echo foo >> {0}"
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+        '''.format(self.output_file)
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+        self.unit_files[UnitFileChange.COMMAND_ADDED_BEFORE] = unit_file_content
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+
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+        unit_file_content = '''
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+        [Service]
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+        Type=oneshot
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+        ExecStart=/bin/sleep 2
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+        ExecStart=/bin/bash -c "echo foo >> {0}"
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+        ExecStart=/bin/bash -c "echo bar >> {0}"
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+        '''.format(self.output_file)
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+        self.unit_files[UnitFileChange.COMMAND_ADDED_AFTER] = unit_file_content
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+
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+        unit_file_content = '''
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+        [Service]
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+        Type=oneshot
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+        ExecStart=/bin/bash -c "echo baz >> {0}"
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+        ExecStart=/bin/sleep 2
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+        ExecStart=/bin/bash -c "echo foo >> {0}"
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+        ExecStart=/bin/bash -c "echo bar >> {0}"
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+        '''.format(self.output_file)
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+        self.unit_files[UnitFileChange.COMMAND_INTERLEAVED] = unit_file_content
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+
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+        unit_file_content = '''
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+        [Service]
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+        Type=oneshot
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+        ExecStart=/bin/bash -c "echo bar >> {0}"
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+        ExecStart=/bin/bash -c "echo baz >> {0}"
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+        '''.format(self.output_file)
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+        self.unit_files[UnitFileChange.REMOVAL] = unit_file_content
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+
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+    def reload(self):
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+        subprocess.check_call(['systemctl', 'daemon-reload'])
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+
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+    def write_unit_file(self, unit_file_change):
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+        if not isinstance(unit_file_change, UnitFileChange):
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+            raise ValueError('Unknown unit file change')
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+
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+        content = self.unit_files[unit_file_change]
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+
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+        with open(self.unitfile_path, 'w') as f:
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+            f.write(content)
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+
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+        self.reload()
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+
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+    def check_output(self, expected_output):
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+        try:
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+            with open(self.output_file, 'r') as log:
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+                output = log.read()
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+        except IOError:
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+            self.fail()
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+
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+        self.assertEqual(output, expected_output)
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+
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+    def setup_unit(self):
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+        self.write_unit_file(UnitFileChange.NO_CHANGE)
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+        subprocess.check_call(['systemctl', '--job-mode=replace', '--no-block', 'start', self.unit])
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+
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+    def test_no_change(self):
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+        expected_output = 'foo\n'
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+
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+        self.setup_unit()
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+        self.reload()
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+        time.sleep(4)
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+
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+        self.check_output(expected_output)
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+
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+    def test_swapped(self):
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+        expected_output = ''
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+
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+        self.setup_unit()
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+        self.write_unit_file(UnitFileChange.LINES_SWAPPED)
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+        self.reload()
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+        time.sleep(4)
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+
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+        self.assertTrue(not os.path.exists(self.output_file))
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+
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+    def test_added_before(self):
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+        expected_output = 'foo\n'
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+
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+        self.setup_unit()
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+        self.write_unit_file(UnitFileChange.COMMAND_ADDED_BEFORE)
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+        self.reload()
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+        time.sleep(4)
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+
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+        self.check_output(expected_output)
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+
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+    def test_added_after(self):
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+        expected_output = 'foo\nbar\n'
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+
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+        self.setup_unit()
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+        self.write_unit_file(UnitFileChange.COMMAND_ADDED_AFTER)
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+        self.reload()
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+        time.sleep(4)
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+
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+        self.check_output(expected_output)
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+
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+    def test_interleaved(self):
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+        expected_output = 'foo\nbar\n'
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+
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+        self.setup_unit()
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+        self.write_unit_file(UnitFileChange.COMMAND_INTERLEAVED)
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+        self.reload()
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+        time.sleep(4)
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+
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+        self.check_output(expected_output)
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+
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+    def test_removal(self):
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+        self.setup_unit()
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+        self.write_unit_file(UnitFileChange.REMOVAL)
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+        self.reload()
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+        time.sleep(4)
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+
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+        self.assertTrue(not os.path.exists(self.output_file))
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+
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+    def tearDown(self):
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+        for f in [self.output_file, self.unitfile_path]:
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+            try:
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+                os.remove(f)
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+            except OSError:
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+                # ignore error if log file doesn't exist
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+                pass
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+
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+        self.reload()
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+
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+if __name__ == '__main__':
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+    unittest.main()