Finish refactor of the new compressed file class support. Closes GitLab issue #7.

Signed-off-by: Roberto Rosario <roberto.rosario.gonzalez@gmail.com>

mayan/apps/common/tests/contrib/test_file1.txt

@@ -0,0 +1 @@
+TEST FILE 1

mayan/apps/common/tests/contrib/test_file2.txt

@@ -0,0 +1 @@
+TEST FILE 2

mayan/apps/common/tests/contrib/test_file3.txt

@@ -0,0 +1 @@
+TEST FILE 3

mayan/apps/common/tests/literals.py

@@ -1,5 +1,38 @@
 from __future__ import unicode_literals
 
+import os
+
+from django.conf import settings
+
 TEST_ERROR_LOG_ENTRY_RESULT = 'test_error_log_entry_result_text'
 TEST_VIEW_NAME = 'test view name'
 TEST_VIEW_URL = 'test-view-url'
+
+# Filenames
+TEST_FILENAME1 = 'test_file1.txt'
+TEST_FILENAME2 = 'test_file2.txt'
+TEST_FILENAME3 = 'test_file3.txt'
+TEST_FILE_CONTENTS_1 = 'TEST FILE 1\n'
+TEST_FILE_CONTENTS_2 = 'TEST FILE 2\n'
+TEST_TAR_BZ2_FILE = 'test_file.tar.bz2'
+TEST_TAR_FILE = 'test_file.tar'
+TEST_TAR_GZ_FILE = 'test_file.tar.gz'
+TEST_ZIP_FILE = 'test_file.zip'
+TEST_COMPRESSED_FILE_CONTENTS = [TEST_FILENAME1, TEST_FILENAME2]
+
+# File paths
+TEST_FILE3_PATH = os.path.join(
+    settings.BASE_DIR, 'apps', 'common', 'tests', 'contrib', TEST_FILENAME3
+)
+TEST_TAR_BZ2_FILE_PATH = os.path.join(
+    settings.BASE_DIR, 'apps', 'common', 'tests', 'contrib', TEST_TAR_BZ2_FILE
+)
+TEST_TAR_FILE_PATH = os.path.join(
+    settings.BASE_DIR, 'apps', 'common', 'tests', 'contrib', TEST_TAR_FILE
+)
+TEST_TAR_GZ_FILE_PATH = os.path.join(
+    settings.BASE_DIR, 'apps', 'common', 'tests', 'contrib', TEST_TAR_GZ_FILE
+)
+TEST_ZIP_FILE_PATH = os.path.join(
+    settings.BASE_DIR, 'apps', 'common', 'tests', 'contrib', TEST_ZIP_FILE
+)

mayan/apps/common/tests/test_compressed_files.py

@@ -0,0 +1,70 @@
+from __future__ import unicode_literals
+
+from common.tests import BaseTestCase
+from django.test import override_settings
+
+from ..compressed_files import Archive, TarArchive, ZipArchive
+
+from .literals import (
+    TEST_COMPRESSED_FILE_CONTENTS, TEST_FILE_CONTENTS_1, TEST_FILE_CONTENTS_2,
+    TEST_FILE3_PATH, TEST_FILENAME1, TEST_FILENAME2, TEST_FILENAME3,
+    TEST_TAR_BZ2_FILE_PATH, TEST_TAR_FILE_PATH, TEST_TAR_GZ_FILE_PATH,
+    TEST_ZIP_FILE_PATH
+)
+
+
+class TarArchiveClassTestCase(BaseTestCase):
+    archive_path = TEST_TAR_FILE_PATH
+    cls = TarArchive
+    filename = TEST_FILENAME3
+    file_path = TEST_FILE3_PATH
+    members_list = TEST_COMPRESSED_FILE_CONTENTS
+    member_name = TEST_FILENAME1
+    member_contents = TEST_FILE_CONTENTS_1
+
+    def test_add_file(self):
+        archive = self.cls()
+        archive.create()
+        with open(self.file_path) as file_object:
+            archive.add_file(file_object=file_object, filename=self.filename)
+            self.assertTrue(archive.members(), [self.filename])
+
+    def test_open(self):
+        with open(self.archive_path) as file_object:
+            archive = Archive.open(file_object=file_object)
+            self.assertTrue(isinstance(archive, self.cls))
+
+    def test_members(self):
+        with open(self.archive_path) as file_object:
+            archive = Archive.open(file_object=file_object)
+            self.assertEqual(archive.members(), self.members_list)
+
+    def test_member_contents(self):
+        with open(self.archive_path) as file_object:
+            archive = Archive.open(file_object=file_object)
+            self.assertEqual(
+                archive.member_contents(filename=self.member_name), self.member_contents
+            )
+
+    def test_open_member(self):
+        with open(self.archive_path) as file_object:
+            archive = Archive.open(file_object=file_object)
+            file_object = archive.open_member(filename=self.member_name)
+            self.assertEqual(
+                file_object.read(), self.member_contents
+            )
+
+
+class ZipArchiveClassTestCase(TarArchiveClassTestCase):
+    archive_path = TEST_ZIP_FILE_PATH
+    cls = ZipArchive
+
+
+class TarGzArchiveClassTestCase(TarArchiveClassTestCase):
+    archive_path = TEST_TAR_GZ_FILE_PATH
+    cls = TarArchive
+
+
+class TarBz2ArchiveClassTestCase(TarArchiveClassTestCase):
+    archive_path = TEST_TAR_BZ2_FILE_PATH
+    cls = TarArchive