Add tests for Gettext comparators

tests/comparators/test_gettext.py

+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+#
+# debbindiff: highlight differences between two builds of Debian packages
+#
+# Copyright © 2015 Jérémy Bobbio <lunar@debian.org>
+#
+# debbindiff 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.
+#
+# debbindiff 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 debbindiff.  If not, see <http://www.gnu.org/licenses/>.
+
+import codecs
+import os.path
+import shutil
+import pytest
+from debbindiff.comparators.gettext import compare_mo_files
+
+TEST_FILE1_PATH = os.path.join(os.path.dirname(__file__), '../data/test1.mo') 
+TEST_FILE2_PATH = os.path.join(os.path.dirname(__file__), '../data/test2.mo') 
+
+def test_no_differences():
+    differences = compare_mo_files(TEST_FILE1_PATH, TEST_FILE1_PATH)
+    assert len(differences) == 0
+
+@pytest.fixture
+def differences():
+    return compare_mo_files(TEST_FILE1_PATH, TEST_FILE2_PATH)[0].details # skip container with path
+
+def test_diff(differences):
+    expected_diff = open(os.path.join(os.path.dirname(__file__), '../data/mo_expected_diff')).read()
+    assert differences[0].unified_diff == expected_diff
+
+def test_charsets():
+    differences = compare_mo_files(os.path.join(os.path.dirname(__file__), '../data/test_no_charset.mo'),
+                                   os.path.join(os.path.dirname(__file__), '../data/test_iso8859-1.mo'))
+    differences = differences[0].details # skip container with path
+    expected_diff = codecs.open(os.path.join(os.path.dirname(__file__), '../data/mo_charsets_expected_diff'), encoding='utf-8').read()
+    assert differences[0].unified_diff == expected_diff

tests/data/mo_charsets_expected_diff

+@@ -1,17 +1,17 @@
+ msgid ""
+ msgstr ""
+ "Project-Id-Version: debbindiff\n"
+ "POT-Creation-Date: 2015-06-24 12:42+0200\n"
+ "PO-Revision-Date: 2015-06-24 14:57+0200\n"
+ "Last-Translator: Someone <user@example.org>\n"
+-"Language-Team: English <user@example.org>\n"
++"Language-Team: Français <user@example.org>\n"
+ "Language: en\n"
+ "MIME-Version: 1.0\n"
+-"Content-Type: text/plain\n"
++"Content-Type: text/plain; charset=iso8859-1\n"
+ "Content-Transfer-Encoding: 8bit\n"
+ 
+ msgid "Another string"
+-msgstr "Another string"
++msgstr "Une chaine, là aussi"
+ 
+ msgid "String"
+-msgstr "String"
++msgstr "Chaine, là"

tests/data/mo_expected_diff

+@@ -1,14 +1,17 @@
+ msgid ""
+ msgstr ""
+ "Project-Id-Version: debbindiff\n"
+ "POT-Creation-Date: 2015-06-24 12:42+0200\n"
+-"PO-Revision-Date: 2015-06-24 12:42+0200\n"
++"PO-Revision-Date: 2015-06-24 14:57+0200\n"
+ "Last-Translator: Someone <user@example.org>\n"
+ "Language-Team: English <user@example.org>\n"
+ "Language: en\n"
+ "MIME-Version: 1.0\n"
+ "Content-Type: text/plain; charset=UTF-8\n"
+ "Content-Transfer-Encoding: 8bit\n"
+ 
++msgid "Another string"
++msgstr "Another string"
++
+ msgid "String"
+ msgstr "String"