[diffoscope] 01/01: Add (failing) test for comparing a device with a regular file fails (re. #850055)

Chris Lamb chris at chris-lamb.co.uk
Tue Jan 31 22:44:10 CET 2017


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lamby pushed a commit to branch lamby/wip/850055-comparing-device-with-file
in repository diffoscope.

commit c478d1342fca461309451f0799b45b297230cab3
Author: Chris Lamb <lamby at debian.org>
Date:   Wed Feb 1 10:43:50 2017 +1300

    Add (failing) test for comparing a device with a regular file fails (re. #850055)
    
    Signed-off-by: Chris Lamb <lamby at debian.org>
---
 tests/comparators/test_device.py | 53 ++++++++++++++++++++++++++++++++++++++++
 tests/data/device_expected_diff  |  0
 2 files changed, 53 insertions(+)

diff --git a/tests/comparators/test_device.py b/tests/comparators/test_device.py
new file mode 100644
index 0000000..af2ae1c
--- /dev/null
+++ b/tests/comparators/test_device.py
@@ -0,0 +1,53 @@
+# -*- coding: utf-8 -*-
+#
+# diffoscope: in-depth comparison of files, archives, and directories
+#
+# Copyright © 2017 Chris Lamb <lamby at debian.org>
+#
+# diffoscope 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.
+#
+# diffoscope 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 diffoscope.  If not, see <https://www.gnu.org/licenses/>.
+
+import pytest
+
+from diffoscope.comparators.binary import FilesystemFile
+from diffoscope.comparators.device import Device
+from diffoscope.comparators.utils.specialize import specialize
+
+from utils.data import load_fixture, data
+
+text_ascii1 = load_fixture('text_ascii1')
+
+ at pytest.fixture
+def devnull():
+    return specialize(FilesystemFile('/dev/null'))
+
+ at pytest.fixture
+def differences(devnull, text_ascii1):
+    return devnull.compare(text_ascii1).details
+
+ at pytest.fixture
+def differences_reverse(devnull, text_ascii1):
+    return text_ascii1.compare(devnull).details
+
+def test_identification(devnull):
+    assert isinstance(devnull, Device)
+
+def test_diff(differences):
+    with open(data('device_expected_diff')) as f:
+        expected_diff = f.read()
+    assert differences[0].unified_diff == expected_diff
+
+def test_diff_reverse(differences_reverse):
+    with open(data('device_expected_diff')) as f:
+        expected_diff = f.read()
+    assert differences[0].unified_diff == expected_diff
diff --git a/tests/data/device_expected_diff b/tests/data/device_expected_diff
new file mode 100644
index 0000000..e69de29

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